AC Tech SM Series VFD Drives Manual

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SCL/SCM Series

Installation and Operation Manual

Contents
1

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1

Products Covered in This Manual. . . . . . . . . . . . . . . . . . . . . 2

1.2

Product Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3

Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.4

Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.5

Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.6

Customer Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SCL/SCM DIMENSIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

SCL/SCM MODEL DESIGNATION CODE. . . . . . . . . . . . . . . . . . . . . . 7

SCL/SCM SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

SCL/SCM RATINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6.1

Installation After a Long Period of Storage. . . . . . . . . . . . . . 9

INPUT AC POWER REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . 10
7.1

Input Voltage Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

7.2

Input Fusing Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 11

7.3

Input Wire Size Requirements . . . . . . . . . . . . . . . . . . . . . . 12

7.4

Installation According to EMC Requirements. . . . . . . . . . . 12

POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.1

Input and Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

SCL/SCM POWER WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . 14

CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10.1

Control Wiring vs. Power Wiring. . . . . . . . . . . . . . . . . . . . . 15

10.2

TB-2: Circuit Common. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SM01N

10.3

Surge Suppression on Relays. . . . . . . . . . . . . . . . . . . . . . . 15

10.4

Start/Stop Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

10.5

Speed Reference Signals. . . . . . . . . . . . . . . . . . . . . . . . . . 15

10.6

Speed Reference Selection . . . . . . . . . . . . . . . . . . . . . . . . 16

10.7

Drive Status Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . 17

SCL/SCM CONTROL WIRING DIAGRAMS. . . . . . . . . . . . . . . . . . . . 18
11.1

SCL/SCM Terminal Strip. . . . . . . . . . . . . . . . . . . . . . . . . . . 18

11.2

Two-Wire Start/Stop Control. . . . . . . . . . . . . . . . . . . . . . . . 19

11.3

Three-Wire Start/Stop Control. . . . . . . . . . . . . . . . . . . . . . . 20

11.4

Preset Speeds & Speed Pot (2-Wire Start/Stop Control). . 21

INITIAL POWER UP AND MOTOR ROTATION . . . . . . . . . . . . . . . . 22

PROGRAMMING THE SCL/SCM DRIVE. . . . . . . . . . . . . . . . . . . . . . 24
13.1

Setting Values in Tenths of Units Above 100. . . . . . . . . . . 25

13.2

Electronic Programming Module (EPM). . . . . . . . . . . . . . . 26

PARAMETER MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

DESCRIPTION OF PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . 31

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

SCL/SCM DISPLAY MESSAGES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

SM01N

17.1

Speed Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

17.2

Changing the Speed Reference Source. . . . . . . . . . . . . . . 48

17.3

Status and Warning Messages. . . . . . . . . . . . . . . . . . . . . . 49

THE SCL/SCM SUB-MICRO DRIVE

Input Power Terminals
(3 left terminals)

DC Bus Terminals
(2 right terminals)

Electronic
Programming
Module
EPM

3-Digit LED Display

Programming
Buttons

Control Terminal Strip

Output Motor Terminals

Safety Information
All safety information given in these Operating Instructions has the same layout:
Signal Word! (characterizes the severity of the danger)
Note (describes the danger and informs on how to proceed)

Signal Words

Icon
Warning of
hazardous
electrical
voltage

DANGER!

Warns of impending danger.
Consequences if disregarded:
Death or severe injuries.

Warning of
a general
danger

WARNING!

Warns of potential, very hazardous situations.
Consequences if disregarded:
Death or severe injuries.

Warning of
damage to
equipment

STOP!

Warns of potential damage to material and
equipment.
Consequences if disregarded:
Damage to the controller/drive or its environment.

Information

Note

Designates a general, useful note.
If you observe it, handling the controller/drive
system is made easier.

SM01N

GENERAL

1.1

Products Covered in This Manual

This manual covers the AC Tech SCL and SCM Series Variable Frequency Drives.
1.2

Product Changes

AC Technology Corporation reserves the right to discontinue or make modifications to the
design of its products without prior notice, and holds no obligation to make modifications
to products sold previously. AC Technology Corporation also holds no liability for losses
of any kind which may result from this action. Instruction manuals with the most up-to-date
information are available for download from the AC Tech website (www.actech.com).
1.3

Warranty

AC Technology Corporation warrants the SCL/SCM Series AC motor control to be free of
defects in material and workmanship for a period of 24 months from the date of shipment
from AC Tech's factory. If, under normal use, an SCL/SCM motor control becomes defective
within the stated warranty time period, contact AC Technology's Service Department for
instructions on obtaining a warranty replacement unit. AC Technology Corporation reserves
the right to make the final determination as to the validity of a warranty claim, and sole
obligation is to repair or replace only components which have been rendered defective
due to faulty material or workmanship. No warranty claim will be accepted for components
which have been damaged due to mishandling, improper installation, unauthorized repair
and/or alteration of the product, operation in excess of design specifications or other
misuse, or improper maintenance. AC Technology Corporation makes no warranty that its
products are compatible with any other equipment, or to any specific application, to which
they may be applied and shall not be held liable for any other consequential damage or
injury arising from the use of its products.
This warranty is in lieu of all other warranties, expressed or implied. No other person,
firm or corporation is authorized to assume, for AC Technology Corporation, any
other liability in connection with the demonstration or sale of its products.
1.4

Receiving

Inspect all cartons for damage which may have occurred during shipping. Carefully
unpack equipment and inspect thoroughly for damage or shortage. Report any damage
to carrier and/or shortages to supplier. All major components and connections should be
examined for damage and tightness, with special attention given to PC boards, plugs,
knobs and switches.
1.5

Safety Information

Some parts of AC Tech controllers can be electrically live and some surfaces can be hot.
Non-authorized removal of the required cover, inappropriate use, and incorrect installation
or operation creates the risk of severe injury to personnel or damage to equipment. All
operations concerning transport, installation, and commissioning as well as maintenance
must be carried out by qualified, skilled personnel familiar with the installation, assembly,
commissioning, and operation of variable frequency drives and the application in which
the drive is used.

SM01N

INSTALLATION
Ensure proper handling and avoid excessive mechanical stress. Do not bend any
components and do not change any insulation distances during transport, handling,
installation or maintenance.
Do not touch any electronic components or contacts. This drive contains electrostatically
sensitive components, which can easily be damaged by inappropriate handling. Static
control precautions must be adhered to during installation, testing, servicing and repairing
of this drive and associated options. Component damage may result if proper procedures
are not followed.
This drive has been tested by Underwriters Laboratory (UL) and is an approved component
in compliance with UL508C Safety Standard.
• Suitable for use on a circuit as described in Section 7.0 of this manual.
• Use minimum 75°C copper wire only.
Warnings!

• Shall be installed in a Pollution Degree 2 macro-environment.

This drive must be installed and configured in accordance with both national and international
standards. Local codes and regulations take precedence over recommendations provided
in this and other AC Tech documentation.
The drive is considered a component for integration into a machine or process. It is neither
a machine nor a device ready for use in accordance with European directives (reference
machinery directive and electromagnetic compatibility directive). It is the responsibility of
the end user to ensure that the machine meets the applicable standards.
ELECTRICAL CONNECTION
When working on live drive controllers, applicable national safety regulations must be
observed. The electrical installation must be carried out according to the appropriate
regulations (e.g. cable cross-sections, fuses, protective earth [PE] connection). While
this document does make recommendations in regards to these items, national and local
codes must be adhered to.
The documentation contains information about installation in compliance with EMC
(shielding, grounding, filters and cables). These notes must also be observed for CEmarked controllers. The manufacturer of the system or machine is responsible for
compliance with the required limit values demanded by EMC legislation.
APPLICATION
The drive must not be used as a safety device for machines where there is a risk of
personal injury or material damage. Emergency Stops, over-speed protection, acceleration
and deceleration limits, etc must be made by other devices to ensure operation under
all conditions.

SM01N

The drive does feature many protection devices which are aimed at protecting the drive
and the driven equipment by generating a fault and shutting the drive and motor down by
removing power. Mains power variances can also result in shutdown of the drive. When
the fault condition disappears or is cleared, the drive can be configured to automatically
restart, it is the responsibility of the user, OEM and/or integrator to ensure that the drive
is configured for safe operation.
1.6

Customer Modification

AC Technology Corporation, its sales representatives and distributors, welcome the
opportunity to assist our customers in applying our products. Many custom options are
available to aid in this function. AC Technology Corporation cannot assume responsibility
for any modifications not authorized by its engineering department.

SM01N

SCL/SCM DIMENSIONS

Dimensions for the SCL/SCM models rated 0.33 - 1.5Hp (0.25 - 1.1kW).

If R < 6.30" (160)
S = 0.19" (5)
T = 0.38" (10)
U = 0.18" (5)
V = 0.66" (17)

T
U
V

D
P

If R = 6.30" (160)
S = 0.28" (7)
T = 0.50" (13)
U = 0.24" (6)
V = 0.90" (23)

S
Dia. Slot
Mounting Tab Detail

0.33

0.25

0.5

0.75

1.5

0.37

0.55

0.75

1.1

INPUT
VOLTAGE

INPUT
PHASE

SCM
MODEL

SCL
MODEL

120

208 / 240

SM004S

N/A

5.75 (146)

SM204S

SL204S

5.75 (146)

2.88 (74)

3.26 (83)

0.28 (7)

4.37 (111)

2.88 (74)

3.26 (83)

0.28 (7)

4.37 (111)

120

SM005S

N/A

5.75 (146)

2.88 (74)

3.26 (83)

0.28 (7)

4.37 (111)

208 / 240

SM205S

SL205S

5.75 (146)

2.88 (74)

3.26 (83)

0.28 (7)

4.37 (111)

208 / 240

SM205

N/A

5.75 (146)

2.88 (74)

3.26 (83)

0.28 (7)

4.37 (111)

400 / 480

SM405

N/A

5.75 (146)

2.88 (74)

3.94 (100)

0.80 (20)

4.37 (111)

208 / 240

SM208S

SL208S

5.75 (146)

2.88 (74)

3.63 (92)

0.63 (16)

4.37 (111)

120

SM010S

N/A

5.75 (146)

3.76 (95)

4.88 (124)

1.50 (38)

4.37 (111)

208 / 240

SM210S

SL210S

5.75 (146)

2.88 (74)

3.63 (92)

0.63 (16)

4.37 (111)

208 / 240

SM210

N/A

5.75 (146)

2.88 (74)

3.63 (92)

0.63 (16)

4.37 (111)

480 / 590

SM410

N/A

5.75 (146)

2.88 (74)

4.74 (120)

1.60 (41)

4.37 (111)
4.37 (111)

120

SM015S

N/A

5.75 (146)

3.76 (96)

4.88 (124)

1.50 (38)

208 / 240

SM215S

SL215S

5.75 (146)

3.76 (96)

4.88 (124)

1.50 (38)

4.37 (111)

208 / 240

SM215

N/A

5.75 (146)

2.88 (73)

5.56 (141)

2.56 (65)

4.37 (111)

400 / 480

SM415

N/A

5.75 (146)

2.88 (73)

5.74 (146)

2.56 (65)

4.37 (111)

Dimensions shown are in inches and (mm).

SM01N

Dimensions for the SCL/SCM models rated 2 - 15Hp (1.5 - 11kW).

If R < 6.30" (160)
S = 0.19" (5)
T = 0.38" (10)
U = 0.18" (5)
V = 0.66" (17)

T
U
V

D
P

If R = 6.30" (160)
S = 0.28" (7)
T = 0.50" (13)
U = 0.24" (6)
V = 0.90" (23)

S
Dia. Slot
Mounting Tab Detail

INPUT
VOLTAGE

1.5

2.2

4.0

7.5

5.5

7.5

INPUT
PHASE

SCM
MODEL

SCL
MODEL

208 / 240

SM220S

SL220S

5.75 (146)

208 / 240

SM220

N/A

5.75 (146)

400 / 480

SM420

N/A

5.75 (146)

208 / 240

SM230S

SL230S

5.75 (146)

3.76 (95)

4.88 (124)

1.50 (38)

4.37 (111)

2.88 (74)

5.56 (141)

2.56 (65)

4.37 (111)

2.88 (74)

5.74 (146)

2.56 (65)

4.37 (111)

3.76 (95)

5.53 (140)

2.18 (55)

4.37 (111)

208 / 240

SM230

N/A

5.75 (146)

3.76 (95)

5.53 (140)

2.18 (55)

4.37 (111)

400 / 480

SM430

N/A

5.75 (146)

3.76 (95)

5.47 (139)

2.13 (54)

4.37 (111)

208 / 240

SM250

N/A

5.75 (146)

3.76 (95)

6.74 (171)

3.40 (160)

3.25 (83)

400 / 480

SM450

N/A

5.75 (146)

3.76 (95)

6.74 (171)

3.40 (160)

3.25 (83)
4.81 (122)

208 / 240

SM275

N/A

7.75 (197)

5.02 (128)

7.18 (182)

3.40 (86)

400 / 480

SM475

N/A

5.75 (146)

3.76 (95)

6.74 (171)

3.40 (160)

3.25 (83)

208 / 240

SM2100

N/A

7.75 (197) 5.02 (128)

7.18 (182)

3.40 (86)

4.81 (122)

400 / 480

SM4100

N/A

7.75 (197)

5.02 (128)

7.18 (182)

3.40 (86)

4.81 (122)

208 / 240

SM2150

N/A

9.75 (248)

6.68 (170)

8.00 (203)

3.40 (86)

6.30 (160)

400 / 480

SM4150

N/A

7.75 (197)

5.02 (128)

7.18 (182)

3.60 (91)

4.81 (122)

Dimensions shown are in inches and (mm)

SM01N

SCL/SCM MODEL DESIGNATION CODE

The SCL/SCM model number gives a full description of the basic drive unit.
EXAMPLE: SL210S = SCL Series, 208/240 Vac, 1 HP, single phase input
SL

Series:
SL = SCL Series Variable Speed AC Motor Drive with integral line filter
SM = SCM Series Variable Speed AC Motor Drive
Input Voltage:
0 = 120 Vac (For 110, 115, and 120 Vac; 50 or 60 Hz)
2 = 208/240 Vac (For 208, 220, 230, and 240 Vac; 50 or 60 Hz)
4 = 400/480 Vac (For 380, 415, 460, and 480 Vac; 50 or 60 Hz)
Rating:
4
5
8
10

= 0.33 Hp (0.25 kW)
= 0.50 Hp (0.37 kW)
= 0.75 Hp (0.55 kW)
= 1 Hp (0.75 kW)

15
20
30
50

= 1.5 Hp (1.1 kW)
= 2 Hp (1.5 kW)
= 3 Hp (2.2 kW)
= 5 Hp (4.0 kW)

75 = 7.5 Hp (5.5 kW)
100 = 10 Hp (7.5 kW)
150 = 15 Hp (11 kW)

Input Phase:
S = Single phase input only.
No character indicates three phase input only

SCL/SCM SPECIFICATIONS
Conformity

Low Voltage Directive (73/23/EEC)

Approvals

UL 508C

Underwriters Laboratories - Power Conversion Equipment

Storage Temperature

-20° to 70° C

Ambient Operating Temperature

0° to 40° C (derate 2.5% per °C above 40°)

Ambient Humidity

< 95% (non-condensing)

Altitude

3300 ft (1000 m) above sea level (derate 5% per additional 3300 ft)

Input Line Voltages

120, 208/240, 400/480 Vac

Input Voltage Tolerance

+10%, -15%

Input Frequency Tolerance

48 to 62 Hz

Output Wave Form

Sine Coded PWM

Output Frequency

0 - 240 Hz

Carrier Frequency

4 kHz to 10 kHz (10 kHz requires derating; see parameter P02)

Service Factor

1.00 (up to 8 kHz carrier; derate for 10 kHz; see parameter P02)

Efficiency

Up to 98%

Power Factor (displacement)

0.96 or better

Overload Current Capacity

150% for 60 seconds, 180% for 30 seconds

Speed Reference Follower

0-10 VDC, 4-20 mA

Digital Outputs
Earth Leakage Current (EN 50178)

(1) Normally open relay; contacts rated 3 amps at 250 Vac
(1) Digital output (current-sourcing); rated 50 mA at 12 VDC
SCL: > 3.5 mA to PE

SCM: < 3.5 mA to PE

SM01N

SCL/SCM RATINGS
SCM

SCL

FOR

INPUT

OUTPUT

HEAT

MODEL

MOTORS

(50 - 60 Hz)

(3 phase)

LOSS 1

CURRENT

(WATTS)

NUMBER NUMBER

RATED
HP

INPUT

PHASE

0.25
0.37
0.75
1.1

1
1
1
1

120 Vac INPUT MODELS
SM004S
SM005S
SM010S
SM015S

N/A
N/A
N/A
N/A

0.33
0.50
1
1.5

SL204S
SL205S
N/A
SL208S
SL210S
N/A
SL215S
N/A
SL220S
N/A
SL230S
N/A
N/A
N/A
N/A
N/A

0.33
0.50
0.50
0.75
1
1
1.5
1.5
2
2
3
3
5
7.5
10
15

0.25
0.37
0.37
0.55
0.75
0.75
1.1
1.1
1.5
1.5
2.2
2.2
4.0
5.5
7.5
11

N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

0.50
1
1.5
2
3
5
7.5
10
15

0.37
0.75
1.1
1.5
2.2
4.0
5.5
7.5
11

6.8
9.2
16.6
24
3.9 / 3.4
5.8 / 5.0
3.1 / 2.7
6.9 / 6.0
10.6 / 9.2
5.8 / 5.1
13.9 / 12.0
8.0 / 6.9
18.4 / 16.0
9.1 / 7.9
24 / 21
12.4 / 10.8
19.6 / 17.1
28 / 25
34 / 32
54 / 48
1.6 / 1.4
3.0 / 2.5
4.3 / 3.6
4.8 / 4.0
6.4 / 5.4
10.6 / 8.8
14.2 / 12.4
18.1 / 15.8
27 / 24

(AMPS)

0 - 230 Vac
0.8
1.1
2.0
2.9

1.7
2.4
4.2
6.0

29
33
57
86

0 - 208 / 230 Vac
0.8
1.2
1.1
1.4
2.2
2.1
2.9
2.9
3.1
3.3
4.1
4.5
7.1
10.3
13.1
20.0

400 / 480 Vac
3
3
3
3
3
3
3
3
3

Values shown for 6kHz carrier frequency at full speed and full load.

SM01N

(kVA)

208 / 240 Vac
1
1
3
1
1
3
1
3
1
3
1
3
3
3
3
3

400 / 480 Vac INPUT MODELS
SM405
SM410
SM415
SM420
SM430
SM450
SM475
SM4100
SM4150

(AMPS)

120 Vac

208 / 240 Vac INPUT MODELS
SM204S
SM205S
SM205
SM208S
SM210S
SM210
SM215S
SM215
SM220S
SM220
SM230S
SM230
SM250
SM275
SM2100
SM2150

CURRENT POWER

1.9 / 1.7
2.8 / 2.4
2.8 / 2.4
3.7 / 3.2
4.8 / 4.2
4.8 / 4.2
6.9 / 6.0
6.9 / 6.0
8.1 / 7.0
8.1 / 7.0
11.0 / 9.6
11.0 / 9.6
17.5 / 15.2
25 / 22
30 / 28
48 / 42

23
31
31
34
47
47
68
68
71
71
108
108
173
286
379
476

0 - 400 / 460 Vac
1.1
2.1
3.0
3.3
4.5
7.1
10.3
13.1
20.0

1.3 / 1.1
2.5 / 2.1
3.6 / 3.0
4.1 / 3.4
5.8 / 4.8
9.4 / 7.8
12.6 / 11.0
16.1 / 14.0
24 / 21

31
47
58
63
92
155
254
310
390

INSTALLATION
NOTE
SCL/SCM Series drives are intended for inclusion within other equipment, by
professional electrical installers according to EN 61000-3-2. They are not intended
for stand-alone operation.

WARNING!

Drives must not be installed where subjected to adverse environmental conditions
such as: combustible, oily, or hazardous vapors or dust; excessive moisture or
dirt; vibration; excessive ambient temperatures. Consult AC Technology for more
information on the suitability of a drive to a particular environment.

SCL/SCM models are suitable for UL Pollution Degree 2 environment only, and MUST be
installed in an electrical enclosure that will provide complete mechanical protection and will
maintain the internal temperature within the drive’s ambient operating temperature rating.
All drive models MUST be mounted in a vertical position for proper heatsink cooling.
Maintain a minimum spacing around the drive of at least 1 inch (25 mm) on each side and
2 inches (50 mm) on the top and bottom for units up to 5 Hp (4 kW), and 2 inches (50 mm)
on each side and 4 inches (100 mm) on the top and bottom for larger units. Allow more
spacing if the drive is mounted next to other heat-producing equipment. Do not mount
drives above other drives or heat producing equipment. Fans or blowers should be used
to insure proper cooling in tight quarters.
In order to properly size an enclosure, the heat generated by the drive(s) must be known.
Refer to the HEAT LOSS column in Section 5.0, SCL/SCM RATINGS. An enclosure
manufacturer can then determine the required enclosure size based on the total heat
generated inside the enclosure (from the drive(s) and other heat sources), the maximum
allowable temperature inside the enclosure, the maximum ambient temperature outside
the enclosure, and the enclosure properties.
The SCL/SCM Series is UL approved for solid state motor overload protection. Therefore,
a separate thermal overload relay is not required for single motor applications.
6.1

Installation After a Long Period of Storage
STOP!
Severe damage to the drive can result if it is operated after a long period of storage
or inactivity without reforming the DC bus capacitors!

If input power has not been applied to the drive for a period of time exceeding three years
(due to storage, etc), the electrolytic DC bus capacitors within the drive can change
internally, resulting in excessive leakage current. This can result in premature failure of
the capacitors if the drive is operated after such a long period of inactivity or storage.
In order to reform the capacitors and prepare the drive for operation after a long period of
inactivity, apply input power to the drive for 8 hours prior to actually operating the motor.

SM01N

INPUT AC POWER REQUIREMENTS
DANGER!
Hazard of electrical shock! Capacitors retain charge after power is removed. Before
servicing the drive, disconnect incoming power and wait until the voltage between
terminals B+ and B- is 0 VDC.

The input voltage must match the nameplate voltage rating of the drive. Voltage fluctuation
must not vary by greater than 10% overvoltage or 15% undervoltage.
NOTE
Drives with dual input voltage ratings must be programmed for the proper supply
voltage (refer to Parameter 01 - LINE VOLTAGE SELECTION in Section 15,
DESCRIPTION OF PARAMETERS).

The drive is suitable for use on a circuit capable of delivering not more than 5,000 RMS
symmetrical amperes at the drive’s rated voltage.
If the kVA rating of the AC supply transformer is greater than 10 times the input kVA rating
of the drive(s), an isolation transformer or 2-3% input line reactor must be added to the
line side of the drive(s).
Three phase voltage imbalance must be less than 2.0% phase to phase. Excessive phase
to phase imbalance can cause severe damage to the drive.
Motor voltage should match line voltage in normal applications. The drive’s maximum
output voltage will equal the input voltage. Use extreme caution when using a motor with
a voltage rating which is different from the input line voltage.
7.1

Input Voltage Ratings

SM000S Series drives are rated for 120 Vac single phase, 50-60 Hz input. The drive will
function with input voltage of 120 Vac (+10%, -15%) at 48 to 62 Hz.
SM200S & SL200S Series drives are rated for 208/240 Vac, single phase, 50-60 Hz
input. The drive will function with input voltage of 208 to 240 Vac (+10%, -15%), at 48
to 62 Hz.
SM200 Series drives are rated for 208/240 Vac, three phase, 50-60 Hz input. The drive
will function with input voltage of 208 to 240 Vac (+10%, -15%) at 48 to 62 Hz.
SM400 Series drives are rated for 400/480 Vac, three phase, 50-60 Hz input. The drive
will function with input voltage of 400 to 480 Vac (+10%, -15%) at 48 to 62 Hz.
NOTE
Parameter 01 - LINE VOLTAGE SELECTION must be programmed according to the
applied input voltage. Refer to Section 15, DESCRIPTION OF PARAMETERS.

SM01N

7.2

Input Fusing Requirements

A circuit breaker or a disconnect switch with fuses must be provided in accordance with
the National Electric Code (NEC) and all local codes. Refer to the following tables for
proper ratings:

INPUT FUSE & CIRCUIT BREAKER RATINGS (for installation to UL and EN 60204-1)
120 Vac 1 phase
SM004S
10 A
SM005S
15 A
SM010S
SM015S

25 A
35 A

208/240 Vac 1 phase
S_204S
10 A
S_205S
10 A
S_208S
10 A
S_210S
15 A
S_215S
20 A
S_220S 25 / 20 A
S_230S 30 / 25 A

208/240 Vac 3 phase

400/480 Vac 3 phase

SM205

10 A

SM405

10 A

SM210
SM215
SM220
SM230
SM250
SM275
SM2100
SM2150

10 A
12 / 10 A
15 / 12 A
20 / 15 A
30 / 25 A
45 / 40 A
50 / 50 A
80 / 75 A

SM410
SM415
SM420
SM430
SM450
SM475
SM4100
SM4150

10 A
10 A
10 A
10 A
15 / 12 A
20 / 20 A
30 / 25 A
40 / 35 A

NOTE
•
•

Applicable national and local electrical codes take precedence over
recommendations in these tables.
Use UL Class CC fast-acting, current limiting type fuses. Select fuses with low
I 2 T values, rated at 200,000 AIC. Recommended fuses are Bussman KTK-R,
JJN, and JJS. Similar fuses with equivalent ratings by other manufacturers may
also be acceptable.

WARNING!
This product can cause a DC current in the protective conductor. Where a residual
current device (RCD) is used for protection in case of direct or indirect contact, only
an RCD of Type B is allowed on the supply side of this product. Otherwise, another
protective measure shall be applied, such as separation from the environment
by double or reinforced insulation, or isolation from the supply system by a
transformer.
Observe the following when using RCDs:
1. Only install the RCD between the supply mains and drive controller.
2. The RCD can be activated by:
- capacitive leakage currents between the cable screens during operation
(especially with long, screened motor cables)
- connecting several drives to the mains at the same time
- additional RFI filters

SM01N

7.3

Input Wire Size Requirements

INPUT WIRE SIZE REQUIREMENTS
120 Vac 1 phase
MODEL

AWG mm2

SM004S
SM005S

14
14

2.5
2.5

SM010S
SM015S

12
10

4.0
6.0

7.4

208/240 Vac 1 phase

208/240 Vac 3 phase

400/480 Vac 3 phase

MODEL

MODEL AWG mm2

SM205

2.5

SM405

2.5

SM210
SM215
SM220
SM230
SM250
SM275
SM2100
SM2150

14
14
14
14
12
8
8
6

2.5
2.5
2.5
2.5
4.0
10
10
16

SM410
SM415
SM420
SM430
SM450
SM475
SM4100
SM4150

14
14
14
14
14
12
10
8

2.5
2.5
2.5
2.5
2.5
4.0
6.0
10

S_204S
S_205S
S_208S
S_210S
S_215S
S_220S
S_230S

AWG mm2
14
14
14
14
14
12
10

2.5
2.5
2.5
2.5
2.5
4.0
6.0

Installation According to EMC Requirements

The SCM and SCL Series can be installed to meet the European standards for
Electromagnetic Compatibility (EMC) requirements. These requirements govern the
permissible electromagnetic emissions and immunity, both radiated and conducted, of
a drive system.
The EMC requirements apply to the final installation in its entirety, not to the individual
components used. Because every installation is different, the recommended installation
should follow these guidelines as a minimum. Additional equipment (such as ferrite core
absorbers on power conductors) or alternative wiring practices may be required to meet
conformance in some installations.
Filter: The input to the drive (or group of drives) must include a filter to reduce the electrical
noise reflected back to the AC Line. The SCL Series includes a filter that has been tested
to meet the industrial standards set by the EU, EN 61800-3 for conducted emissions and
EN 55011 for radiated emissions to class A compliance when installed in a control cabinet
with a motor cable < 10m. The SCM can be installed to meet these same standards when
used with an appropriately installed external line filter.
EMC
Compliance with EN 61800-3/A11
Installation: Shielded cable must be used for all control and power cables
and exposed wiring must be kept as short as possible.

A Screen clamps

B Control cable

C Low-capacitance motor cable

(core/core < 75 pF/m, core/screen < 150 pF/m)

D Electrically conductive mounting plate
E Filter

SM01N

SM01 1

POWER WIRING
DANGER!
Hazard of electrical shock! Capacitors retain charge after power is removed. Before
servicing the drive, disconnect the incoming power and wait until the voltage between
terminals B+ and B- is 0 VDC.

Note the drive input and output current ratings and the check applicable electrical codes for
required wire type and size, grounding requirements, over-current protection, and incoming
power disconnect, before wiring the drive. Size conservatively to minimize voltage drop.
Input fusing and a power disconnect switch or contactor MUST be wired in series with
terminals L1 and L2/N (on single-phase input models), or terminals L1, L2, and L3 (on
three-phase input models). This disconnect must be used to power down the drive when
servicing, or when the drive is not to be operated for a long period of time, but should not
be used to start and stop the motor.
Repetitive cycling of a disconnect or input contactor (more than once every two
minutes) may cause damage to the drive.
8.1

Input and Output Wiring

On single phase input models, wire the input power to terminals L1 and L2/N. On three
phase input models, wire the input power to terminals L1, L2, and L3. Refer to Section 9,
SCL/SCM POWER WIRING DIAGRAM.
Keep all three power output wires, from terminals U, V, and W to the motor, tightly bundled
and run them in a separate conduit away from all other power and control wiring.
It is not recommended to install contactors or disconnect switches between the drive and
motor. Operating such devices while the drive is running can potentially cause damage
to the drive's power components. If such a device is required, it should only be operated
when the drive is in a STOP state. If there is potential for the device to be opened while
the drive is running, the drive must be programmed for COAST to stop (refer to Parameter
4 - STOP METHOD), and an auxiliary contact on the device must be interlocked with the
drive's run circuit. This will give the drive a stop command at the same time the device
opens, and will not allow the drive to start again until the device is closed.

SM01N

SCL/SCM POWER WIRING DIAGRAM
Input
Single Phase Models

Input
Three Phase Models

208/240V 7.5Hp and larger
400/480V 10Hp and larger

208/240V up to 5Hp
400/480V up to 7.5Hp

Input AC Voltage

L1 L2/N

B- B+

7 5 10 HP
(5 5 7 5 kW)

0 25 5 HP
(0 37 4 kW)
4 5 lb in / 0 5 Nm

10 lb in / 1 2 Nm

0 24 in / 6 mm

0 35 in / 9 mm

Input AC Voltage

PE lug on heatsink

Input AC Voltage

L2 L3

B- B+

18 lb in / 2 0 Nm

Output

15 HP
(11 kW)

PE lug on heatsink

PE PE

T1 T2

T3 B- B+

0 5 in / 13 mm

PES
PES

Torque Requirements
PES
-

3-Phase
AC Motor

DC
Bus
Voltage

WARNING!
•
•

DO NOT connect incoming AC power to output terminals U, V, W, or terminals
B+, B-! Severe damage to the drive will result.
Leakage current may exceed 3.5 mA AC. Minimum size of the protective earth
(PE) conductor shall comply with local safety regulations for high leakage current
equipment.

NOTE
•
•
•
•
•
•

SM01N

WIRE AND GROUND IN ACCORDANCE WITH NEC OR CEC, AND ALL
APPLICABLE LOCAL CODES.
Motor wires MUST be run in a separate steel conduit away from control wiring
and incoming AC power wiring.
Do not install contactors between the drive and the motor without consulting AC
Technology for more information. Failure to do so may result in drive damage.
Use only UL and CSA listed and approved wire.
Minimum wire voltage rating is 300 V for 120, 208, and 240 Vac systems, and
600 V for 400 and 480 Vac systems.
Wire gauge must be based on a minimum of 125% of the rated input/output current
of the drive, and a minimum 75°C insulation rating. Use copper wire only.

CONTROL WIRING

10.1

Control Wiring vs. Power Wiring

External control wiring MUST be run in a separate conduit away from all other input and
output power wiring. If control wiring is not kept separate from power wiring, electrical noise
may be generated on the control wiring that will cause erratic drive behavior. Use twisted
wires or shielded cable grounded at the drive chassis ONLY. Recommended control wire
is Belden 8760 (2-wire), 8770 (3-wire), or equivalent.
NOTE
Control terminals provide basic isolation (insulation per EN 61800-5-1). Protection
against contact can only be assured by additional measures e.g. supplemental
insulation.

Strip off 0.20 to 0.25 inches (5 to 6 mm) of insulation for control wiring, and torque the
control terminals to 2 lb-in (0.2 Nm). Be careful not to overtorque the control terminals, as
this will cause damage to the terminal strip. This is not covered under warranty and can
only be repaired by replacing the control board.
10.2

TB-2: Circuit Common

The TB-2 terminal is used as circuit common for the analog speed reference inputs. If
necessary TB-2 may be connected to chassis ground.
10.3

Surge Suppression on Relays

Current and voltage surges and spikes in the coils of contactors, relays, solenoids, etc,
near or connected to the drive, can cause erratic drive operation. Therefore, a snubber
circuit should be used on coils associated with the drive. For AC coils, snubbers should
consist of a resistor and a capacitor in series across the coil. For DC coils, a free-wheeling
or flyback diode should be placed across the coil. Snubbers are typically available from
the manufacturer of the device.
10.4

Start/Stop Control

There are various control schemes that allow for 2-wire and 3-wire Start/Stop circuits. Refer
to the wiring diagrams in Section 11, SCL/SCM CONTROL WIRING DIAGRAMS.
10.5

Speed Reference Signals

The drive allows for three analog speed reference inputs:
SPEED POT

Connect the wiper of a speed pot to terminal TB-5, and connect the high
and low end leads to terminals TB-6 and TB-2, respectively. The speed
pot can be 2.5kΩ up to 10kΩ.

0-10 VDC

Wire the positive to terminal TB-5 and the negative to terminal TB-2. TB-5
input impedance is 120kΩ.

4-20 mA

Wire the positive to terminal TB-25 and the negative to terminal TB-2.
TB-25 input impedance is 250Ω.
15

SM01N

10.6

Speed Reference Selection

If an analog speed reference input is used to control the drive speed, terminal TB-13A,
13B, or 13E (Parameter 10, 11, or 12) may be programmed as the input select for the
desired analog input signal. When that TB-13 terminal is then closed to TB-11, the drive
will follow the selected analog speed reference input.
If an analog speed reference input is not selected on the terminal strip using TB-13A, 13B,
or 13E, speed control will default to STANDARD mode, which is governed by the setting
of STANDARD SPEED SOURCE (Parameter 05). The STANDARD SPEED SOURCE
can be the  and  buttons on the front of the drive, PRESET SPEED #1 (Parameter
31), a 0-10 VDC signal, or a 4-20 mA signal.
0 - 10 VDC and 4 - 20 mA INPUT SIGNALS
TB-13A, TB-13B, and TB-13E can all be programmed to select a 0-10 VDC or 4-20 mA
analog speed reference input.
PRESET SPEEDS
TB-13A can be programmed to select PRESET SPEED #1 (04), TB-13B to select
PRESET SPEED #2 (04), and TB-13E to select PRESET SPEED #3 (04). There are a
total of seven preset speeds, which are activated by different combinations of contact
closures between TB-13A, 13B, 13E and TB-11. Refer to Parameters 31-37 in Section
15, DESCRIPTION OF PARAMETERS.
JOG
TB-13B can be programmed to select either JOG FORWARD (07) or JOG REVERSE
(08). The Jog speed is set by PRESET SPEED #2 (Parameter 32). Close TB-13B to
TB-11 to JOG, and open the contact to STOP.
WARNING!
When operating in JOG mode, the STOP signal and the AUXILIARY STOP function
(see Parameters 10-12) WILL NOT stop the drive. To stop the drive, remove the
JOG command.
JOG REVERSE will operate the drive in reverse rotation even if ROTATION
DIRECTION (Parameter 17) is set to FORWARD ONLY.

NOTE
If the drive is commanded to JOG while running, the drive will enter JOG mode
and run at PRESET SPEED #2. When the JOG command is removed, the drive
will STOP.

MOTOR OPERATED POT (MOP) / FLOATING POINT CONTROL
TB-13B and TB-13E are used for this function, which controls the drive speed using
contacts wired to the terminal strip. Program TB-13B for DECREASE FREQ (05), and
program TB-13E for INCREASE FREQ (05). Closing TB-13B to TB-11 will cause the
speed setpoint to decrease until the contact is opened. Closing TB-13E to TB-11 will
cause the speed setpoint to increase until the contact is opened. The INCREASE FREQ
function will only operate while the drive is running.
SM01N

NOTE
If TB-13A, TB-13B, and TB-13E are all programmed to select speed references, and
two or three of the terminals are closed to TB-11, the higher terminal has priority and
will override the others. For example, if TB-13A is programmed to select 0-10VDC,
and TB-13E is programmed to select PRESET SPEED #3, closing both terminals
to TB-11 will cause the drive to respond to PRESET SPEED #3, because TB-13E
overrides TB-13A.
The exception to this is the MOP function, which requires the use of TB-13B and TB13E. This leaves TB-13A to be used for some other function. If TB-13A is programmed
for a speed reference, and TB-13A is closed to TB-11, TB-13A will override the MOP
function.

10.7

Drive Status Digital Outputs

There is one Form A relay at terminals TB-16 and TB-17. The relay contacts are rated 3
amps at 250 Vac.
Terminal TB-13E can also be configured as a digital output. This output circuit is a currentsourcing type rated at 12 VDC and 50 mA maximum.
The Form A relay and digital output can be programmed to indicate any of the following:
RUN, FAULT, INVERSE FAULT, FAULT LOCKOUT, AT SPEED, ABOVE PRESET SPEED
#3, CURRENT LIMIT, AUTO SPEED MODE, and REVERSE. Refer to Parameters 06
and 12 in Section 15, DESCRIPTION OF PARAMETERS.
The diagram below illustrates how TB-13E, when configured as a digital output, can be
used to drive an external relay:
Diode Snubber
(1N4148 or Equivalent)

SCL/SCM Terminal Strip

TB-13E

Relay Coil

TB-2

TB-13E used to Drive an External Relay

SM01N

SCL/SCM CONTROL WIRING DIAGRAMS

11.1

SCL/SCM Terminal Strip

Shown below is the control terminal strip, along with a brief description of the function of
each terminal. The following wiring diagram examples provide a quick reference to wire
the drive for the most common configurations.

SIGNAL COMMON

0-10V DC INPUT

SPEED POT POWER SUPPLY

DIGITAL INPUT REFERENCE

13A 13B 13E

4-20mA INPUT

TB-13E FUNCTION SELECT

TB-13B FUNCTION SELECT

TB-13A FUNCTION SELECT

1
RUN

FORM A RELAY

Maintained
RUN/STOP
Contact

SCL/SCM Terminal Strip
NOTE
•
•

SM01N

The function of terminals TB-13A, 13B, 13E and the Form A relay at terminals
16 and 17 are dependent on the programming of certain parameters.
Refer to Section 15, DESCRIPTION OF PARAMETERS.
The digital inputs (terminals 1, 13A, 13B, and 13E) are active-high. They can
be activated using terminal 11 (which is +12 VDC) as shown in the following
diagrams, or by using an external voltage source with a range of +12 VDC to
+28 VDC (+ 10%).

11.2

Two-Wire Start/Stop Control

SIGNAL COMMON

0-10V DC INPUT

SPEED POT POWER SUPPLY

DIGITAL INPUT REFERENCE

Maintained
RUN/STOP
Contact
(FORWARD)

13A 13B 13E

4-20mA INPUT

TB-13E FUNCTION SELECT

TB-13B FUNCTION SELECT

TB-13A FUNCTION SELECT
RUN REVERSE

1
RUN

FORM A RELAY

Maintained
RUN/STOP
Contact
(REVERSE)

2-Wire Start/Stop Control
NOTE
•
•

•

Close TB-1 to TB-11 to RUN, and open to STOP. TB-1 functions as a RUN
input for two-wire start/stop circuits, and a STOP input for three-wire start/stop
circuits. Refer to Section 11.3
If reverse direction is required, set ROTATION (Parameter 17) to FORWARD
AND REVERSE (02), and program TB-13A (Parameter 10) to RUN REVERSE
(06). Close TB-13A to TB-11 to RUN in the reverse direction, and open to
STOP.
For 0-10 VDC or 4-20 mA speed control, set STANDARD SPEED SOURCE
(Parameter 05) to 0-10 VDC (03) or 4-20 mA (04).

SM01N

11.3

Three-Wire Start/Stop Control

SIGNAL COMMON

0-10V DC INPUT

SPEED POT POWER SUPPLY

DIGITAL INPUT REFERENCE

Momentary
STOP
Contact

13A 13B 13E

REV

FWD

4-20mA INPUT

TB-13E FUNCTION SELECT
(START FORWARD)

TB-13B FUNCTION SELECT

TB-13A FUNCTION SELECT
(START REVERSE)

1
STOP

FORM A RELAY

Momentary
START
Contact

3-Wire Start/Stop Control
NOTE
•
•
•
•

SM01N

Program TB-13E (Parameter 12) for START FORWARD (06).
If reverse direction is required, set ROTATION (Parameter 17) to FORWARD
AND REVERSE (02), and program TB-13A (Parameter 10) for START
REVERSE (07).
Momentarily close TB-13E to TB-11 to START in the forward direction, or close
TB-13A to TB-11 to START in the reverse direction. Momentarily open TB-1 to
TB-11 to STOP the drive.
For 0-10 VDC or 4-20 mA speed control, set STANDARD SPEED SOURCE
(Parameter 05) to 0-10 VDC (03) or 4-20 mA (04).

11.4

Preset Speeds & Speed Pot (2-Wire Start/Stop Control)

13A 13B 13E

TB-13E FUNCTION SELECT
(PRESET SPEED #3)

0-10V DC INPUT

TB-13B FUNCTION SELECT
(PRESET SPEED #2)

SIGNAL COMMON

TB-13A FUNCTION SELECT
(PRESET SPEED #1)

DIGITAL INPUT REFERENCE

SPEED POT POWER SUPPLY

1
RUN

FORM A RELAY

SPEED
POT

Maintained
RUN/STOP
Contact

Speed Potentiometer
NOTE:
•

•
•

For preset speed control, all or some of the TB-13 terminals must be
programmed as preset speed selects. If only two or three preset speeds are
required, only two of the TB-13 terminals must be used. Refer to the table in
the description of Parameters 31-37 in Section 15.
Program the PRESET SPEEDS (Parameters 31-37) to the desired values.
If speed pot control is desired when none of the preset speeds are selected (all
preset speed selects are open to TB-11), set STANDARD SPEED SOURCE
(Parameter 05) to 0-10 VDC (03).

SM01N

INITIAL POWER UP AND MOTOR ROTATION
DANGER!
Hazard of electrical shock! Wait three minutes after disconnecting incoming power
before servicing drive. Capacitors retain charge after power is removed.

STOP!
•

•

DO NOT connect incoming AC power to output terminals U, V, and W or
terminals B+, B-! Severe damage to the drive will result. Do not continuously
cycle input power to the drive more than once every two minutes. Damage to
the drive will result.
Severe damage to the drive can result if it is operated after a long
period of storage or inactivity without reforming the DC bus capacitors!
Refer to Section 6.1, Installation After a Long Period of Storage

Before attempting to operate the drive, motor, and driven equipment, be sure all procedures
pertaining to installation and wiring have been properly followed.
Disconnect the driven load from the motor. Verify that the drive input terminals (L1 and
L2/N, or L1, L2, and L3) are wired to the proper input voltage per the nameplate rating
of the drive.
Energize the incoming power line. The LED display will flash a three digit number (320
in the example below) that identifies the parameter version contained in the drive. The
display should then read “- - -”, which indicates that the drive is in a STOP condition. This
is shown below:
Apply input power
Display flashes parameter
version (300-399)
Display then reads "- - -"

Follow this 4-step procedure to check the motor rotation. This procedure assumes that
the drive has been powered up for the first time, and that none of the parameters have
been changed.
1. Use the  button to decrease the speed setpoint to 00.0 Hz. The left decimal point
will illuminate as the speed setpoint is decreased. If the  button is held down, the
speed setpoint will decrease by tenths of Hz until the next whole Hz is reached, and
then it will decrease by one Hz increments. Otherwise, each push of the  button will
decrease the speed setpoint by a tenth of a Hz.
Once 00.0 Hz is reached, the display will toggle between “00.0” and “- - -”, which
indicates that the drive is in a STOP condition with a speed setpoint of 00.0 Hz.
2. Give the drive a START command. This can be done using one of several wiring
methods described in Section 11, SCL/SCM CONTROL WIRING DIAGRAMS. Once
the START command is issued, the display will read “00.0”, indicating that the drive
is in a RUN condition with a speed setpoint of 00.0 Hz.

SM01N

3. Use the  button to increase the speed setpoint until the motor starts to rotate. The left
decimal point will light as the speed setpoint is increased. If the  button is held down,
the speed setpoint will increase by tenths of Hz until the next whole Hz is reached,
and then it will increase by one Hz increments. Otherwise, each push of the button
will increase the speed setpoint by a tenth of a Hz.
4. If the motor is rotating in the wrong direction, give the drive a STOP command and
remove power from the drive. Wait three minutes for the bus capacitors to discharge,
and swap any two of the motor wires connected to U, V, W.
NOTE
The drive is phase insensitive with respect to incoming line voltage. This means
that the drive will operate with any phase sequence of the incoming three phase
voltage. Therefore, to change the motor rotation, the phases must be swapped at
the drive output terminals or at the motor.

SM01N

PROGRAMMING THE SCL/SCM DRIVE

The drive may be programmed by one of two methods: using the three buttons and 3-digit
LED display on the front of the drive, or by programming the Electronic Programming
Module (EPM) using the optional EPM Programmer. This section describes programming
the drive using the buttons and display, which are shown below:

BUTTONS

DISPLAY

Mode
To enter the PROGRAM mode to access the parameters, press the Mode button. This will
activate the PASSWORD prompt (if the password has not been disabled). The display will
read “00” and the upper right-hand decimal point will be blinking, as shown below:
Press Mode
Display reads "00"
Upper right decimal point blinks
Use the  and  buttons to scroll to the password value (the factory default password
is “225”) and press the Mode button. Once the correct password value is entered, the
display will read "P01", which indicates that the PROGRAM mode has been accessed at
the beginning of the parameter menu (P01 is the first parameter). This is shown below:
Use  and  to scroll to the
password value

Press Mode to enter password

Parameter menu is accessed
at the first parameter

NOTE
If the display flashes “Er”, the password was incorrect, and the process to enter the
password must be repeated.

SM01N

Use the s and t buttons to scroll to the desired parameter number. In the example below,
Parameter 19 is being displayed, which is the ACCELERATION TIME of the drive:
Use s and t to scroll to the desired
parameter number (the example is
Parameter 19 - ACCELERATION
TIME)

Once the desired parameter number is found, press the Mode button to display the present
parameter setting. The upper right-hand decimal point will begin blinking, indicating that
the present parameter setting is being displayed, and that it can be changed by using
the  and  buttons.
Press Mode to display present
parameter setting (example setting is 20.0)
Upper right decimal point blinks
Use s and t to change setting
(example setting changed to
30.0)
Press Mode to store new setting
Pressing Mode will store the new setting and also exit the PROGRAM mode. To change
another parameter, press the Mode key again to re-enter the PROGRAM mode (the
parameter menu will be accessed at the parameter that was last viewed or changed before
exiting). If the Mode key is pressed within two minutes of exiting the PROGRAM mode,
the password is not required access the parameters. After two minutes, the password
must be entered in order to access the parameters again.
13.1

Setting Values in Tenths of Units Above 100

Parameter settings and the keypad speed command can always be adjusted in tenths of
unit increments from 0.0 to 99.9. Above 100 however, values can be set in whole units or
tenths of units, depending on the setting of Parameter 16 - UNITS EDITING.
If Parameter 16 - UNITS EDITING is set to WHOLE UNITS (02), parameter values and
the keypad speed command can only be adjusted by whole unit increments above 100.
For example, Parameter 19 - ACCELERATION TIME could not be set to 243.7 seconds.
It could only be set to 243 or 244 seconds. Likewise, the keypad speed command (set
using the s and t buttons) could not be set to 113.4 Hz. It could only be set to 113 or
114 Hz.

SM01N

If, however, Parameter 16 - UNITS EDITING is set to TENTHS OF UNITS (01), parameter
values and the keypad speed command can be adjusted in tenths of unit increments up
to a value of 1000 (above 1000, whole unit increments only). Each push of the s or t
button will adjust the value by one tenth of a unit. If the s or t button is pressed and
held, the value will increment by tenths of units until the next whole unit is reached, and
then the value will increment by whole units.
When a value above 100 is being adjusted by tenths of units, the value is shifted to the
left by one digit so that the tenths portion of the value can be displayed. This results in
the first digit (reading from left to right) of the value disappearing from the display. Also,
the lower decimal point will blink to indicate that the actual value is above 100. Once
the value is no longer being adjusted, the value will shift back to the right and the tenths
portion of the value will disappear.
In the example below, Parameter 19 - ACCELERATION TIME is presently set to 243.0
seconds, and is being increased to 243.7 seconds.
Go to Parameter 19 and press
Mode to see present setting ("243"
seconds)
Upper right decimal point blinks

Press s button to see tenths portion
Value shifts to the left ("2" disappears)
Upper right decimal point and lower
decimal point blink

Press s button to scroll up to "43.7"

Press Mode to store new value
13.2

Electronic Programming Module (EPM)

Every SCL/SCM Series drive has an Electronic Programming Module (EPM) installed on
the main control board. The EPM stores the user’s parameter settings and special OEM
default settings (if programmed). The EPM is removable, allowing it to be installed in
another drive for quick set-up. For example, if a drive is being replaced with a new one,
the EPM can be taken out of the first drive and installed in the new drive. Downtime is
minimized because the new drive does not require programming - it is ready to run when
the EPM is installed.

SM01N

The SCL/SCM Series drive contains two or three sets of parameter values, depending on
whether the drive has been programmed with optional OEM default settings. The first set
of values is the factory default settings, which are permanently stored on the main control
board and cannot be changed. The second set of values is the user settings, which are
stored in the EPM. When the drive leaves the factory, the user settings are the same as
the factory default settings, but the user settings can be changed to configure the drive
for a particular application. The optional third set of values is the OEM default settings,
which are also stored in the EPM. OEM default settings are typically used in cases where
many drives are used for the same application, which requires that all of the drives have
the same parameter settings. The OEM default settings cannot be changed without the
optional EPM Programmer. The drive can be programmed to operate according to the user
settings or the OEM default settings (Refer to Parameter 48 in Section 15).
NOTE
The drive will not operate without the EPM installed. The drive will display “F1” if
the EPM is missing or damaged.

STOP!
Do not remove the EPM while power is applied to the drive. Damage to the EPM
and/or drive may result.

The optional EPM Programmer has the ability to quickly and easily program many SC
Series drives for the same configuration. Once a “master” EPM is programmed with the
desired parameter settings, the EPM Programmer can then copy those settings to other
EPMs, allowing many drives to be configured very quickly. Consult the EPM Programmer
Instruction Manual or contact the factory for more information.
If the OEM settings in the EPM become corrupted, the drive will operate normally, until an
attempt is made to perform a RESET OEM using Parameter 48, PROGRAM SELECTION.
The drive will then flash “GF” to indicate that the OEM settings are no longer valid. The
EPM must then be re-programmed using the optional EPM Programmer.
If the OEM settings and the user settings are both corrupted, the drive will display “GF”
immediately and the drive will require a RESET 60 or RESET 50 using Parameter 48,
PROGRAM SELECTION. Once the RESET is performed, the parameters can then be
programmed individually to match the OEM default settings. This will allow the drive to
operate as if it were in OEM mode, even though it is actually operating in USER mode.
Refer to Parameter 48 in Section 15, DESCRIPTION OF PARAMETERS.
NOTE
The drive will also display “GF” if a RESET OEM or OPERATE WITH OEM SETTINGS
is attempted when the EPM does not contain OEM defaults.

SM01N

PARAMETER MENU

NO.

PARAMETER NAME

RANGE OF ADJUSTMENT

FACTORY
DEFAULT

LINE VOLTAGE

HIGH (01), LOW (02)

HIGH (01)

CARRIER FREQUENCY

4kHz (01), 6 kHz (02), 8 kHz (03), 10 kHz (04)

6 kHz (02)

START METHOD

NORMAL (01), START ON POWER UP (02),
START WITH DC BRAKE (03),
AUTO RESTART WITH DC BRAKE (04),
FLYING RESTART 1 (05),
FLYING RESTART 2 (06),
FLYING RESTART 3 (07)

NORMAL (01)

STOP METHOD

COAST (01), COAST WITH DC BRAKE (02),
RAMP (03), RAMP WITH DC BRAKE (04)

COAST (01)

STANDARD SPEED
SOURCE

KEYPAD (01), PRESET #1 (02),
0-10 VDC (03), 4-20 mA (04)

KEYPAD (01)

RELAY OUTPUT

NONE (01), RUN (02), FAULT (03),
INVERSE FAULT (04), FAULT LOCKOUT (05),
AT SET SPEED (06), ABOVE PRESET #3 (07),
CURRENT LIMIT (08), AUTO SPEED (09),
REVERSE (10)

NONE (01)

TB-13A FUNCTION
SELECT

NONE (01), 0-10 VDC (02), 4-20 mA (03),
PRESET SPEED #1 (04),
START FORWARD (05),RUN REVERSE (06),
START REVERSE (07),
EXTERNAL FAULT (08),
INVERSE EXT FAULT (09),
AUXILIARY STOP (10),
ACCEL/DECEL #2 (11)

NONE (01)

TB-13B FUNCTION
SELECT

NONE (01), 0-10 VDC (02), 4-20 mA (03),
PRESET SPEED #2 (04), DECREASE FREQ (05),
START FORWARD (06), JOG FORWARD (07),
JOG REVERSE (08), EXTERNAL FAULT (09),
INVERSE EXT FAULT (10), AUX. STOP (11),
ACCEL/DECEL #2 (12), REMOTE KEYPAD (13)

NONE (01)

SM01N

NO.

FACTORY
DEFAULT

PARAMETER NAME

RANGE OF ADJUSTMENT

TB-13E INPUT
FUNCTIONS

NONE (01), 0-10 VDC (02), 4-20 mA (03),
PRESET SPEED #3 (04), INCREASE FREQ (05),
START FORWARD (06), EXTERNAL FAULT (07),
INVERSE EXT FAULT (08), AUX. STOP (09),
ACCEL/DECEL #2 (10),

TB-13E OUTPUT
FUNCTIONS

RUN (11), FAULT (12), INVERSE FAULT (13),
FAULT LOCKOUT (14), AT SET SPEED (15),
ABOVE PRESET #3 (16), CURRENT LIMIT (17),
AUTO SPEED (18), REVERSE (19),
DYNAMIC BRAKING (20),

OTHER FUNCTIONS

REMOTE KEYPAD (21)

CONTROL

TERMINAL STRIP ONLY (01)
REMOTE KEYPAD ONLY (02)

TERMINAL
STRIP ONLY
(01)

UNITS EDITING

TENTHS OF UNITS (01), WHOLE UNITS (02)

WHOLE
UNITS (02)

ROTATION

FORWARD ONLY (01),
FORWARD AND REVERSE (02)

FORWARD
ONLY (01)

ACCELERATION TIME

0.1 - 3600.0 SEC

20.0 SEC

DECELERATION TIME

0.1 - 3600.0 SEC

20.0 SEC
0.0 SEC

NONE (01)

DC BRAKE TIME

0.0 - 3600.0 SEC

DC BRAKE VOLTAGE

0.0 - 30.0 %

0.0 %

MINIMUM FREQUENCY

0.0 - MAXIMUM FREQUENCY

0.0 Hz

MAXIMUM FREQUENCY

MINIMUM FREQUENCY - 240 Hz

CURRENT LIMIT

30 - 180 %

180 %

MOTOR OVERLOAD

30 - 100 %

100 %

BASE FREQUENCY

25.0 - 500.0 Hz

SCL = 50.0 Hz
SCM = 60.0 Hz

FIXED BOOST

0.0 - 30.0 %

1.0 %

ACCEL BOOST

0.0 - 20.0 %

0.0 %

SM01N

NO.

PARAMETER NAME

RANGE OF ADJUSTMENT

FACTORY
DEFAULT

SLIP COMPENSATION

0.0 - 5.0 %

0.00 %

31-37

PRESET SPEEDS

0.0 - MAXIMUM FREQUENCY

0.0 Hz

SKIP BANDWIDTH

0.0 - 10.0 Hz

0.0 Hz

SPEED SCALING

0.0 - 6500.0

0.0

ACCEL/DECEL #2

0.1 - 3600.0 SEC

20.0 SEC

PASSWORD

000 - 999

225

SPEED AT MIN SIGNAL

MINIMUM FREQUENCY - 999Hz

0.0Hz

SPEED AT MAX SIGNAL

MINIMUM FREQUENCY - 999Hz

SCL = 50 Hz
SCM = 60 Hz

CLEAR HISTORY

MAINTAIN (01), CLEAR (02)

MAINTAIN (01)

PROGRAM SELECTION

USER SETTINGS (01)
OEM SETTINGS (02)
RESET OEM (03), RESET 60 (04)
RESET 50 (05), TRANSLATE (06)

SCL = RESET
50 (05)
SCM = RESET
60 (04)
(N/A)

FAULT HISTORY

(VIEW-ONLY)

SOFTWARE CODE

(VIEW-ONLY)

(N/A)

DC BUS VOLTAGE

(VIEW-ONLY)

(N/A)

MOTOR VOLTAGE

(VIEW-ONLY)

(N/A)

LOAD

(VIEW-ONLY)

(N/A)
(N/A)

0-10 VDC INPUT

(VIEW-ONLY)

4-20 mA INPUT

(VIEW-ONLY)

(N/A)

TB STRIP STATUS

(VIEW-ONLY)

(N/A)

KEYPAD STATUS

(VIEW-ONLY)

(N/A)

SM01N

15
P01

DESCRIPTION OF PARAMETERS
LINE VOLTAGE SELECTION

Parameter P01 calibrates the drive for the actual applied input voltage. Set this parameter
to HIGH (01) for 120, 220-240, and 460-480 Vac input, or LOW (02) for 200-208 and
380-415 Vac input.
NOTE
If this parameter is changed while the drive is running, the new value will not take
effect until the drive is stopped.

P02

CARRIER FREQUENCY

Parameter P02 sets the switching rate of the output IGBT’s. Increasing the carrier
frequency will result in less audible motor noise. Available settings are: 4 kHz, 6 kHz, 8
kHz, and 10 kHz.
PARAMETER
SETTING

CARRIER
FREQUENCY

AMBIENT OR
OUTPUT DERATE

4 kHz

40°C or 100%

6 kHz

40°C or 100%

8 kHz

40°C or 100%

10 kHz

35°C or 92%

NOTE
•
•

P03

The SCL/SCM drive is fully rated up to 8 kHz carrier frequency. If the 10 kHz
carrier frequency is selected, the drive’s ambient temperature rating OR output
current rating must be de-rated to the value shown in the table above.
If this parameter is changed while the drive is running, the change will not take
effect until the drive is stopped.

START METHOD
WARNING!
Automatic starting of equipment may cause damage to equipment and/or injury to
personnel! Automatic start should only be used on equipment that is inaccessible
to personnel.

NORMAL: The drive will start when the appropriate contact is closed on the terminal
strip. See Section 11 for possible control configurations.

START ON POWER UP: The drive will automatically start upon application of input
power.

SM01N

START WITH DC BRAKE: When a START command is given, the drive will apply DC
BRAKE VOLTAGE (Parameter 22) for the duration of DC BRAKE TIME (Parameter
21) prior to starting the motor to ensure that the motor is not turning.

AUTO RESTART WITH DC BRAKING: Upon a START command, after a fault, or
upon application of power, the drive will apply DC BRAKE VOLTAGE (Parameter 22)
for the duration of DC BRAKE TIME (Parameter 21) prior to starting (or restarting)
the motor.

FLYING RESTART 1: LOW performance. Slowest synchronization and lowest current
level. This setting results in the smoothest synchronization.

FLYING RESTART 2: MEDIUM performance. Faster synchronization and
higher current level. This setting allows faster synchronization while retaining
smoothness.

FLYING RESTART 3: HIGH performance. Fastest synchronization and highest current
level. This setting allows the fastest synchronization, but sacrifices smoothness.

When programmed for auto-restart (settings 04 - 07), the drive will attempt three restarts
after a fault. The interval between restart attempts is 15 seconds for setting 04, and 2
seconds for settings 05, 06 and 07. During the interval between restart attempts, the display
will read “SP” to indicate Start Pending. If all three restart attempts fail, the drive will trip
into FAULT LOCKOUT (displayed “LC”) and require a manual reset. Refer to Section 16,
TROUBLESHOOTING.
The FLYING RESTART 1 - 3 settings allow the drive to start into a spinning load after a fault
or upon application of input power. They differ in the time required to find the motor speed
and the amount of current required to synchronize with it. The faster the drive attempts
to find the motor speed, the more current is required. The first two restart attempts will try
to start into the spinning load, but the third restart attempt will act like AUTO RESTART
WITH DC BRAKING.
NOTE
Settings 02 and 04 - 07 require a two-wire start/stop circuit to operate. The RUN
contact must remain closed for the power-up start and auto-restart functions to
operate.

P04

STOP METHOD

COAST TO STOP: When a STOP command is given, the drive shuts off the output
to the motor, allowing it to coast freely to a stop.

COAST WITH DC BRAKE: When a stop command is given, the drive will activate
DC braking (after a delay of up to 2 seconds, depending on frequency) to help
decelerate the load. Refer to Parameters: 21 - DC BRAKE TIME, and 22 - DC BRAKE
VOLTAGE.

RAMP TO STOP: When a stop command is given, the drive will decelerate the motor
to a stop at the rate determined by Parameter 20 - DECELERATION TIME.

SM01N

P05

RAMP WITH DC BRAKE: When a stop command is given, the drive will decelerate
the motor down to 0.2 Hz (at the rate set by Parameter 20 - DECELERATION TIME)
and then activate DC braking according to the settings of Parameters 21 - DC BRAKE
TIME and 22 - DC BRAKE VOLTAGE. This is used to bring the load to a final stop,
as the motor may still be turning slightly after the drive stops.
STANDARD SPEED SOURCE

P05 selects the speed reference source when the drive is in STANDARD speed mode.
The following speed references can be selected:
01

KEYPAD: Use the s and t buttons to scroll to the desired speed.

PRESET SPEED #1: Drive will operate at the frequency set in Parameter 31.

0-10 VDC: Drive will respond to a 0-10 VDC signal wired to TB-5 (+) and TB-2 (-).

4-20 mA: Drive will respond to a 4-20 mA signal wired to TB-25 (+) and TB-2 (-).

P06

RELAY OUTPUT

P06 selects the status indication for the normally open relay output at TB-16 and TB-17:
01

NONE: Disables the relay output.

RUN: Closes upon a START command. Opens if the drive is in a STOP state, the
drive faults, or input power is removed. DC braking is considered a STOP state.

FAULT: Closes if there is no fault condition. Opens if the drive faults, or input power
is removed.

INVERSE FAULT: Closes if the drive faults. Opens if there is no fault condition.

FAULT LOCKOUT: Closes when input power is applied. Opens if three restart attempts
are unsuccessful, or if input power is removed.

AT SET SPEED: Closes if the drive is within + 0.5 Hz of the speed setpoint.

ABOVE PRESET SPEED #3: Closes if the output frequency exceeds PRESET
SPEED #3 (Parameter 33). Opens if the output frequency is equal to or less than
PRESET SPEED #3.

CURRENT LIMIT: Closes if the output current exceeds the CURRENT LIMIT setting.
Opens if the output current is equal to or less than CURRENT LIMIT (see Parameter
25).

AUTOMATIC SPEED MODE: Closes if an AUTOMATIC (terminal strip) speed
reference is active. Opens if a STANDARD (Parameter 5) speed reference is
active.

REVERSE: Closes when reverse rotation is active. Opens when forward rotation is
active (see Parameter 17 - ROTATION DIRECTION).

SM01N

P10

TB-13A FUNCTION SELECT

P10 selects the function of terminal TB-13A. Closing TB-13A to TB-11 (or opening in
the case of settings 08 and 10) activates the selected function. The following functions
can be selected:
01

NONE: Disables the TB-13A function.

0-10 VDC: Selects a 0-10 VDC signal (at TB-5) as the AUTO speed reference
input.

4-20 mA: Selects a 4-20 mA signal (at TB-25) as the AUTO speed reference input.

PRESET SPEED #1: Selects PRESET SPEED #1 as the speed reference. The drive
will operate at the frequency programmed into Parameter 31.

START FORWARD: Sets up the drive for a 3-wire start/stop circuit. Momentarily close
TB-13A to TB-11 to start the drive, and momentarily open TB-1 to TB-11 to stop.

RUN REVERSE: Close TB-13A to TB-11 to run in the reverse direction, and open
to stop. Close TB-1 to TB-11 to run in the forward direction and open to stop.

START REVERSE: Momentarily close TB-13A to TB-11 to start the drive in the reverse
direction, and momentarily open TB-1 to TB-11 to stop. Parameter 17 - ROTATION
must be set to FORWARD AND REVERSE (02), and TB-13E must be used for
START FORWARD.

EXTERNAL FAULT: Sets TB-13A as a normally closed external fault input. Open
TB-13A to TB-11 to trip the drive.

INVERSE EXTERNAL FAULT: Sets TB-13A as a normally open external fault input.
Close TB-13A to TB-11 to trip the drive.

AUXILIARY STOP: When TB-13A is opened with respect to TB-11, the drive will
decelerate to a STOP (even if STOP METHOD is set to COAST) at the rate set into
ACCEL/DECEL #2 (Parameter 42).

ACCEL/DECEL #2: Selects the acceleration and deceleration time programmed into
ACCEL/DECEL #2 (Parameter 42).

P11

TB-13B FUNCTION SELECT

P11 selects the function of terminal TB-13B. Closing TB-13B to TB-11 (or opening in
the case of settings 09 and 11) activates the selected function. The following functions
can be selected:
01

NONE: Disables the TB-13B function.

0-10 VDC: Selects a 0-10 VDC signal (at TB-5) as the AUTO speed reference
input.

4-20 mA: Selects a 4-20 mA signal (at TB-25) as the AUTO speed reference input.

PRESET SPEED #2: Selects PRESET SPEED #2 as the speed reference. The drive
will operate at the frequency programmed into Parameter 32.

SM01N

DECREASE FREQ: Closing TB-13B to TB-11 will decrease the speed setpoint until
the contact is opened. TB-13E must be programmed for INCREASE FREQ.

START FORWARD: Sets up the drive for a 3-wire start/stop circuit. Momentarily close
TB-13B to TB-11 to start the drive, and momentarily open TB-1 to TB-11 to stop.

JOG FORWARD: Close TB-13B to TB-11 to JOG in the forward direction. The drive
will run at PRESET SPEED #2 (Parameter 32) when in JOG mode.

JOG REVERSE: Close TB-13B to TB-11 to JOG in the reverse direction. The drive
will run at PRESET SPEED #2 (Parameter 32) when in JOG mode.
WARNING!
•
•

When operating in JOG mode, the STOP signal and the AUXILIARY STOP
function (see Parameters 10-12) WILL NOT stop the drive. To stop the drive,
remove the JOG command.
JOG REVERSE will operate the drive in reverse rotation even if ROTATION
DIRECTION (Parameter 17) is set to FORWARD ONLY.

EXTERNAL FAULT: Sets TB-13B as a normally closed external fault input. Open
TB-13B to TB-11 to trip the drive.

INVERSE EXTERNAL FAULT: Sets TB-13B as a normally open external fault input.
Close TB-13B to TB-11 to trip the drive.

AUXILIARY STOP: When TB-13B is opened with respect to TB-11, the drive will
decelerate to a STOP (even if STOP METHOD is set to COAST) at the rate set into
ACCEL/DECEL #2 (Parameter 42).

ACCEL/DECEL #2: Selects the acceleration and deceleration time programmed into
Parameter 42 - ACCEL/DECEL #2.

REMOTE KEYPAD: When the Remote Keypad option is being used, TB-13B must
be set to this function. Also, TB-13E (Parameter 12) must be set for REMOTE
KEYPAD (21), and CONTROL (Parameter 14) must be set to REMOTE KEYPAD
ONLY (02).
NOTE
If the drive is commanded to JOG while running, the drive will enter JOG mode and
run at PRESET SPEED #2 (Parameter 32). When the JOG command is removed,
the drive will STOP.

P12

TB-13E FUNCTION SELECT

Parameter P12 selects the function of terminal TB-13E. This terminal can be configured
as a digital input (settings 01 to 10) or a digital status output (settings 11 to 20). When
used as an input, closing TB-13E to TB-11 (or opening in the case of settings 07 and 09)
activates the selected function.
When used as an output, P12 can provide the drive's status for monitoring. If the Remote
Keypad option is being used, this parameter must be set to REMOTE KEYPAD (21).

SM01N

The following input functions can be selected for P12:
01

NONE: Disables the TB-13E function.

0-10 VDC: Selects a 0-10 VDC signal (at TB-5) as the AUTO speed reference
input.

4-20 mA: Selects a 4-20 mA signal (at TB-25) as the AUTO speed reference input.

PRESET SPEED #3: Selects PRESET SPEED #3 as the speed reference. The drive
will operate at the frequency programmed into Parameter 33.

INCREASE FREQ: Closing TB-13E to TB-11 will increase the speed setpoint until
the contact is opened. INCREASE FREQ will only work when the drive is running.
TB-13B must be programmed for DECREASE FREQ.

START FORWARD: Sets up the drive for a 3-wire start/stop circuit. Momentarily close
TB-13E to TB-11 to start the drive, and momentarily open TB-1 to TB-11 to stop.

EXTERNAL FAULT: Sets TB-13E as a normally closed external fault input. Open
TB-13E to TB-11 to trip the drive.

INVERSE EXTERNAL FAULT: Sets TB-13E as a normally open external fault input.
Close TB-13E to TB-11 to trip the drive.

AUXILIARY STOP: When TB-13E is opened with respect to TB-11, the drive will
decelerate to a STOP (even if STOP METHOD is set to COAST) at the rate set into
ACCEL/DECEL #2 (Parameter 42).

ACCEL/DECEL #2: Selects the acceleration and deceleration time programmed into
ACCEL/DECEL #2 (Parameter 42).

The following output functions can be selected for P12. The terms "open" and "close"
refer to the state of the internal transistor that activates the circuit. When the transistor
is "closed" the circuit is complete, and TB-13E is pulled up to 15 VDC (when "open", TB13E is at 0 VDC potential).
11

RUN: Closes upon a START command. Opens if the drive is in a STOP state, the
drive faults, or input power is removed. DC braking is considered a STOP state.

FAULT: Closes if there is no fault condition. Opens if the drive faults, or input power
is removed.

INVERSE FAULT: Closes if the drive faults. Opens if there is no fault condition.

FAULT LOCKOUT: Closes when input power is applied. Opens if three restart attempts
are unsuccessful, or if input power is removed.

AT SET SPEED: Closes if the drive is within + 0.5 Hz of the speed setpoint.

ABOVE PRESET SPEED #3: Closes if the output frequency exceeds PRESET
SPEED #3 (Parameter 33). Opens if the output frequency is equal to or less than
PRESET SPEED #3.

CURRENT LIMIT: Closes if the output current exceeds the CURRENT LIMIT setting.
Opens if the output current is equal to or less than CURRENT LIMIT (see Parameter
25).

SM01N

AUTOMATIC SPEED MODE: Closes if an AUTOMATIC (terminal strip) speed
reference is active. Opens if a STANDARD (Parameter 5) speed reference is
active.

REVERSE: Closes when reverse rotation is active. Opens when forward rotation is
active (refer to Parameter 17 - ROTATION DIRECTION).

DYNAMIC BRAKING: TB-13E becomes the "trigger" that activates the optional
external Dynamic Braking module. Refer to the instructions included with the Dynamic
Braking option.

REMOTE KEYPAD: When the Remote Keypad option is being used, TB-13E must be
set for this function. Also, TB-13B (Parameter 11) must be set for Remote Keypad (13)
and CONTROL (Parameter 14) must be set for REMOTE KEYPAD ONLY (02).

P14

CONTROL

Parameter P14 selects the source of START/STOP and direction commands.
01

TERMINAL STRIP ONLY: The drive will only respond to START/STOP and direction
commands from the terminal strip.

REMOTE KEYPAD ONLY: The drive will only respond to START/STOP and direction
commands from the optional remote keypad. Terminals 13B and 13E must also be
set for the REMOTE KEYPAD option (refer to Parameters 12 and 13).

P16

UNITS EDITING

P16 allows parameter and keypad speed editing in whole units or tenths of units above
100. Below 100, the value can always be changed by tenths of units.
01

TENTHS OF UNITS: The value can always be changed by tenths of units (up to a
value of 1000). If the  or  button is pressed and held, the value will change by
tenths of units until the next whole unit is reached, and then the value will change by
whole units. Refer to Section 13.1, Setting Values in Tenths of Units Above 100.

WHOLE UNITS: The value can be changed by tenths of units until 99.9 is reached.
Above 99.9, the value will change in whole unit increments only. Below a value of
100, if the  or  button is pressed and held, the value will change by tenths of units
until the next whole unit is reached, and then the value will change by whole units.

P17

ROTATION DIRECTION

FORWARD ONLY: The drive will only allow rotation in the forward direction. However,
JOG REVERSE (see Parameter 11) will still operate even if FORWARD ONLY is
selected.

FORWARD AND REVERSE: The drive will allow rotation in both directions.

P19

ACCELERATION TIME

P19 sets the acceleration rate for all of the speed reference sources (keypad, speed pot,
jog, MOP, and preset speeds). This setting is the time to accelerate from 0 Hz to the BASE
FREQUENCY (Parameter 27).
37

SM01N

P20

DECELERATION TIME

P20 sets the deceleration rate for all of the speed reference sources (keypad, speed pot, jog,
MOP, and preset speeds). This setting is the time to decelerate from BASE FREQUENCY
to 0 Hz. If the drive is set for COAST TO STOP (setting 01 or 02 in Parameter 04), this
parameter will have no effect when a STOP command is given.
P21

DC BRAKE TIME

P21 sets the length of time that the DC braking voltage is applied to the motor. The DC
BRAKE TIME should be set to the lowest value that provides satisfactory operation in
order to minimize motor heating.
P22

DC BRAKE VOLTAGE

P22 sets the magnitude of the DC braking voltage, in percentage of the line voltage. The
point at which the DC braking is activated depends on the selected STOP METHOD
(Parameter 04):
If COAST WITH DC BRAKE is selected, braking is activated after a time delay of up to 2
seconds, depending on the output frequency at the time of the STOP command. In this
case, the DC braking is the only force acting to decelerate the load.
If RAMP WITH DC BRAKE is selected, braking is activated when the output frequency
reaches 0.2 Hz. In this case, the drive decelerates the load to a near stop and then DC
braking is used to bring the load to a final stop.
P23

MINIMUM FREQUENCY

P23 sets the minimum output frequency of the drive for all speed reference sources except
the PRESET SPEEDS (Parameters 31-37), and is used with MAXIMUM FREQUENCY
(Parameter 24) to define the operating range of the drive.
When using an analog input speed reference (0-10 VDC or 4-20 mA), Parameters 45
and 46 (SPEED AT MIN SIGNAL and SPEED AT MAX SIGNAL) also affect the drive's
speed range.
NOTE
If this parameter is changed while the drive is running, the new value will not take
effect until the drive is stopped.

P24

MAXIMUM FREQUENCY

P24 sets the maximum output frequency of the drive for all speed reference sources,
and is used with MINIMUM FREQUENCY (Parameter 23) to define the operating range
of the drive.
When using an analog input speed reference (0-10 VDC or 4-20 mA), Parameters 45 and
46 (SPEED AT MIN SIGNAL and SPEED AT MAX SIGNAL) also affect the drive's speed
range.
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NOTE
If this parameter is changed while the drive is running, the new value will not take
effect until the drive is stopped.

P25

CURRENT LIMIT

P25 sets the maximum allowable output current of the drive. The maximum setting is
either 180% or 150%, depending on whether LINE VOLTAGE SELECTION (Parameter
01) is set to HIGH or LOW.
If the load demands more current than the CURRENT LIMIT setting, the drive will reduce
the output frequency in an attempt to reduce the output current. When the overcurrent
condition passes, the drive will accelerate the motor back up to the speed setpoint.
P26

MOTOR OVERLOAD

The SCL/SCM Series is UL approved for solid state motor overload protection, and
therefore does not require a separate thermal overload relay for single motor applications.
This circuit allows the drive to deliver up to 150% current for one minute. If the overload
circuit “times out”, the drive will trip into an OVERLOAD fault (displayed as "PF"). MOTOR
OVERLOAD should be set to the ratio (in percent) of the motor current rating to the drive's
output current rating to properly protect the motor.
Example: A 3 HP, 480 Vac drive with a 4.8 Amp rating is operating a 2 HP motor with a
current rating of 3.4 Amps. Dividing the motor current rating by the drive's output current
rating yields 71% (3.4 / 4.8 = 0.71 = 71%), so this parameter should be set to 71%.
P27

BASE FREQUENCY

The BASE FREQUENCY determines the V/Hz ratio by setting the output frequency at
which the drive will output full voltage to the motor. In most cases, the BASE FREQUENCY
should be set to match the motor’s rated frequency.
Example: A 230 Vac, 60 Hz motor requires a V/Hz ratio of 3.83 (230 V / 60 Hz = 3.83
V/Hz) to produce full torque. Setting the BASE FREQUENCY to 60 Hz causes the drive
to output full voltage (230 Vac) at 60 Hz, which yields the required 3.83 V/Hz. Output
voltage is proportional to output frequency, so the 3.83 V/Hz ratio is maintained from 0
- 60 Hz, allowing the motor to produce full torque from about 2 Hz (below 2 Hz there is
less torque due to slip) up to 60 Hz.
NOTE
If this parameter is changed while the drive is running, the new value will not take
effect until the drive is stopped.

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P28

FIXED BOOST

FIXED BOOST increases starting torque by increasing the output voltage when operating below
half of the base frequency. For better out-of-the-box performance, SCL/SCM Series drives
are shipped with a setting that is different from the factory default of 1%. Units rated 0.33 to 1
HP (0.25 to 0.75 kW) = 5.3%, 1.5 to 2 HP (1.1 to 1.5 kW) = 4.4%, 3 HP (2.2 kW) = 3.6%, 5 HP
(4 kW) = 3.0%, 7.5 HP (5.5 kW) = 2.7%, 10 HP (7.5 kW) = 2.4%, and 15 HP (11 kW) =
2.2%.
P29

ACCELERATION BOOST

ACCELERATION BOOST helps accelerate high-inertia loads. During acceleration, the
output voltage is increased to increase motor torque. Once the motor reaches the new
speed setpoint, the boost is turned off and the output voltage returns to the normal
value.
P30

SLIP COMPENSATION

SLIP COMPENSATION is used to counteract changes in motor speed (slip) caused by
changes in load. In a standard AC induction motor, the shaft speed decreases as load
increases, and increases as load decreases. By increasing or decreasing the output
frequency in response to an increasing or decreasing load, the slip is counteracted and
speed is maintained. Most standard NEMA B motors have a 3% slip rating.
P31 - P37 PRESET SPEED #1 - #7
Preset speeds are activated by contact closures between TB-11 and TB-13A, 13B, and
13E. The TB-13 terminals must be programmed as preset speed selects using Parameters
10-12.
NOTE
Preset speeds can operate below the frequency defined by the Minimum Frequency
parameter (Parameter 23).

Refer to the table below for activation of the preset speeds using the TB-13 terminals:
SPEED #

TB - 13A

TB - 13B

TB - 13E

1
2

CLOSED
OPEN

OPEN
CLOSED

OPEN
OPEN
CLOSED

OPEN

CLOSED

OPEN

CLOSED

OPEN

CLOSED

6
7

OPEN
CLOSED

CLOSED
CLOSED

NOTE
When a TB-13 terminal is programmed for a function other than a preset speed
select, it is considered OPEN for the table above.

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Preset Speed #6 and #7 can also be used as skip frequencies to restrict the drive from
operating at frequencies that cause vibration in the system. Refer to Parameter 38.
P38

SKIP BANDWIDTH

The SCL/SCM drive has two skip frequencies that can be used to lock out critical
frequencies that cause mechanical resonance in the system. Once SKIP BANDWIDTH is
set to a value other than 0 Hz, the skip frequencies are enabled. When the skip frequency
function is enabled, PRESET SPEED #6 and #7 are used as the skip frequencies. SKIP
BANDWIDTH sets the range above the skip frequencies that the drive will not operate
within.
Example: The critical frequency is 23 Hz, and it is desired to skip a frequency range of
3 Hz above and below the critical frequency (therefore the skip range is 20 to 26 Hz).
PRESET SPEED #6 or #7 would be set to 20 Hz, and the SKIP BANDWIDTH would be
set to 6 Hz.
If the drive is running at a speed below the skip range, and it is given a speed command
that is within the skip range, the drive will accelerate to the start of the skip range (20 Hz
in the example) and run at that speed until the speed command is greater than or equal to
the "top" of the skip range. The drive will then accelerate through the skip range to the new
speed. Likewise, if the drive is running at a speed above the skip range, and it is given a
speed command that is within the skip range, the drive will decelerate to the "top" of the
skip range (26 Hz in the example) and run at that speed until the speed command is less
than or equal to the "bottom" of the skip range. The drive will then decelerate through the
skip range to the new speed.
NOTE
PRESET SPEEDS #6 and #7 can still be used as preset speeds even if they are
also being used as skip frequencies.

P39

SPEED SCALING

Parameter P39 scales the display to indicate speed in units other than frequency. This
parameter should be set to the desired display value when the drive output is 60 Hz. The
highest setting is 6500, and the highest value that can be displayed is 6553.6. If SPEED
SCALING is set to 0.0, the speed scaling function is disabled and the display will indicate
frequency.
Example: A machine produces 175 parts per hour when the motor is running at 60 Hz.
Setting SPEED SCALING to 175 will calibrate the drive's display to read 175 when the
motor is running at 60 Hz. This is a linear function, so at 30 Hz the display would read
87.5 Hz, and at 120 Hz the display would read 350.

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NOTE
•
•

P42

If the displayed value will exceed 999, the value is shown in two parts. For
example, if the displayed value is 1800, the display will indicate this by toggling
between "1--" and "800".
If SPEED SCALING is set such that the maximum displayable value (6553.6) is
exceeded, the display will flash "9999" to indicate that the value is out of range.
For example, if SPEED SCALING is set to 6000, the drive will display 6000
when it is running at 60 Hz. If the speed is increased past 65.5 Hz (at 65.5 Hz,
the scaled value would be 6550), the display will flash "9999" because a scaled
value above 6553.6 cannot be displayed.

ACCEL / DECEL #2

Parameter P42 sets the second acceleration and deceleration rate of the drive, which can
be activated using terminals TB-13A, 13B, or 13E (Parameter 10, 11, or 12).
P44

PASSWORD

P44 allows the PASSWORD to be changed to any number between 000 and 999. Setting
PASSWORD to 000 disables the password function. The factory default password is
225.
P45

SPEED AT MIN SIGNAL

P45 sets the speed at which the drive will run when it receives the minimum speed
reference signal (0 VDC or 4 mA). This is used in conjunction with SPEED AT MAX
SIGNAL (Parameter 46) to define the speed range of the drive when following an analog
speed reference signal.
P46

SPEED AT MAX SIGNAL

P46 sets the speed at which the drive will run when it receives the maximum speed
reference signal (10 VDC or 20 mA). This is used in conjunction with SPEED AT MIN
SIGNAL (Parameter 45) to define the speed range of the drive when following an analog
speed reference signal.
NOTE
If SPEED AT MIN SIGNAL is set higher than SPEED AT MAX SIGNAL, the drive
will react inversely to the speed reference signal. Therefore, as the speed reference
signal increases, the drive speed will decrease, and vice-versa.

P47

CLEAR FAULT HISTORY

MAINTAIN: Maintains the FAULT HISTORY (Parameter 50) entries for
troubleshooting.

CLEAR: Erases the FAULT HISTORY (Parameter 50) entries.

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P48

PROGRAM SELECTION

P48 is used to select whether the drive will operate according to the user settings or the
optional OEM default settings, and to reset the parameters to default settings. Refer to
Section 13.2.
01

OPERATE WITH USER SETTINGS: The drive will operate according to the user
settings. Operation in USER mode allows the parameter values to be changed to
suit any application.

OPERATE WITH OEM DEFAULTS: The drive will operate according to the optional
OEM default settings, which configure the drive for a specific application. When
operating in OEM mode, the parameter values can be viewed, but not changed. If
an attempt is made to change a parameter setting, the display will flash “GE”. If the
drive is not programmed with OEM default settings, the display will flash “GF” if this
option is selected.

RESET OEM: Resets the user parameters to the OEM default settings. If the drive
is not programmed with OEM default settings, the display will flash “GF” if this option
is selected.

RESET 60: Resets the user parameters to the factory defaults for a 60 Hz base
frequency. Parameters 24, 27, and 46 will reset to 60.0 Hz.

RESET 50: Resets the user parameters to the factory defaults for a 50 Hz base
frequency. Parameters 24, 27, and 46 will reset to 50.0 Hz.

TRANSLATE: If an EPM from a drive with a previous (but compatible) parameter
version is installed in a new drive, the new drive will function like the previous version
drive, but none of the parameter settings can be changed ("cE" will be displayed if this
is attempted). The TRANSLATE function converts the EPM to the new parameter
version so that the parameters can be changed, but it also retains the old parameter
settings so the new drive will operate like the old drive without having to re-program
all of the parameters. Once the EPM is "translated", it will no longer work in the old
drive.
NOTE
•

•

If the user parameters are reset to the OEM defaults (using the RESET OEM
option), and then OPERATE WITH USER SETTINGS is selected, the USER
settings will be the same as the OEM default settings. This allows the drive to
operate as if it was in OEM mode, but the parameter values can be changed.
This is useful if some of the OEM default settings need to be fine-tuned for proper
operation. The new parameter values are not actually stored as new OEM default
settings however; they are simply stored as new USER settings. Therefore, if
the parameters are reset to the OEM defaults again, the parameters that were
changed will be reset to their “old” value. The optional EPM Programmer is
required to change OEM default settings. Refer to Section 13.2.
Only the TRANSLATE (06) function can be performed while the drive is running.
The display will flash "Er" if an attempt is made to select any other function while
the drive is running.

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P50

FAULT HISTORY

The FAULT HISTORY stores the last eight faults that tripped the drive. Refer to Section
16, TROUBLESHOOTING for a list of the faults and possible causes.
Use the  and  buttons to scroll through the fault entries. The faults are stored from
newest to oldest, with the first fault shown being the most recent.
The display will read “_ _” if the FAULT HISTORY does not contain any fault messages.
P51

SOFTWARE VERSION

Parameter P51 displays the software version number for the control board software. This
information is useful when contacting the factory for programming or troubleshooting
assistance.
The software version is displayed in two parts which alternate. The first part is the software
version, and the second part is the revision number. For example, if the display flashes
"94" and "02", this indicates that the drive contains the second revision of version 94
software.
P52

DC BUS VOLTAGE

P52 displays the DC bus voltage in percent of nominal. Nominal DC bus voltage is
determined by multiplying the drive’s nameplate input voltage rating by 1.4.
P53

MOTOR VOLTAGE

P53 displays the output voltage in percent of the drive’s nameplate output voltage
rating.
P54

MOTOR LOAD

P54 displays the motor load in percent of the drive’s output current rating.
P55

0-10 VDC INPUT

Parameter P55 displays the level of the 0-10 VDC input signal at TB-5. A reading of 100%
indicates a 10 VDC input at TB-5.
P56

4-20 mA INPUT

Parameter P56 displays the level of the 4-20 mA input signal at TB-25. A reading of
20% indicates a 4 mA input at TB-25, and a reading of 100% indicates a 20 mA input at
TB-25.

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P57

TERMINAL STRIP STATUS

P57 indicates the status of several terminals using the vertical segments of the LED display.
An illuminated segment indicates that the particular terminal is closed to TB-11.

TB-1

P58

TB-13A

TB-13E
(input)

TB-13B

TB-13E
(output)

FACTORY
RESERVED

KEYPAD AND PROTECTION STATUS

P58 indicates the status of the buttons on the keypad, and the status of the protective
circuitry in the drive, using the horizontal segments of the LED. An illuminated segment
indicates that the corresponding button is pressed, or the protective circuit is active.




FCLIM

Mode

OUTPUT
FAULT

FCLIM is an abbreviation for Fast Current Limit.

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TROUBLESHOOTING

To aid in troubleshooting, Parameters 50 through 60 can be accessed without entering the
PASSWORD. Simply press the Mode button twice to “skip” over the PASSWORD prompt,
and “P50” will be displayed to indicate that the parameter menu has been entered and
Parameter 50 (FAULT HISTORY) can be viewed. The  and  buttons can then be used
to scroll from Parameter 50 to Parameter 60. Once the desired parameter is found, press
the Mode button to view its “contents”. When finished, press Mode to exit the parameter
menu. An example is shown herein:
Press Mode once
Display reads "00"
Upper right decimal point blinks
Press Mode again

Display reads "P50" (FAULT HISTORY)
Use  and  to scroll to the desired
parameter number
(In this example Parameter 54 has been
selected, which is MOTOR LOAD)
Press Mode to view parameter contents (77 = 77% LOAD)
Upper right decimal point blinks
Press Mode again to exit
In the example above, Parameter 54 - MOTOR LOAD is being viewed. The “77” in the
example indicates that the load on the motor is 77% of the output current rating of the
drive.
The table herein lists the fault conditions that will cause the drive to shut down, as well
as some possible causes. Contact the factory for more information on troubleshooting
faults.

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FAULT MESSAGES
FAULT

DESCRIPTION & POSSIBLE CAUSES

High Temp. Fault: Ambient temperature is too high; Cooling fan has failed (if
equipped).

Control Fault: A blank EPM, or an EPM with corrupted data has been installed. Perform a factory reset using Parameter 48 - PROGRAM SELECTION.

Incompatibility Fault: An EPM with an incompatible parameter version has been installed. Either remove the EPM or perform a factory reset (Parameter 48) to change
the parameter version of the EPM to match the parameter version of the drive.

Dynamic Braking Fault: The drive has sensed that the dynamic braking resistors are
overheating and shuts down to protect the resistors.

External Fault: One of the TB-13 terminals is set as an External Fault input and that
terminal is open with respect to TB-11. Refer to Parameters 10, 11 and 12.

Data Fault: User data and OEM defaults in the EPM are corrupted.

High DC Bus Voltage Fault: Line voltage is too high; Deceleration rate is too fast;
Over-hauling load. For fast deceleration or overhauling loads, dynamic braking may
be required

Remote Keypad Fault: The communication link between the drive and the optional
Remote Keypad has been lost. Check for proper wiring and/or noise.

Low DC Bus Voltage Fault: Line voltage is too low.

Output Transistor Fault: Phase to phase or phase to ground short circuit on the
output; Boost settings are too high; Acceleration rate is too fast; Failed output transistor.

PF
UF
F1
FC,
F2 - F9,
Fo

Current Overload Fault: VFD is undersized for the application; Mechanical problem
with the driven equipment.
Start Fault: Start command was present when the drive was powered up. Must
wait 2 seconds after power-up to apply Start command if START METHOD is set to
NORMAL.
EPM Fault: The EPM is missing or damaged.
Internal Faults: The control board has sensed a problem - consult factory.

To clear a fault, issue a STOP command on the terminal strip. The fault will only clear if
the condition that caused the fault has passed. For example, if the drive trips on a LOW
DC BUS VOLTAGE FAULT (LF) due to low input voltage, the fault cannot be cleared until
the input voltage returns to a normal level.
If the drive is programmed to automatically restart after a fault (see Parameter 03), the
drive will attempt to restart three times after a fault (the drive will not restart after CF, cF,
GF, FC, F1, F2-F9, or Fo faults). If all three restart attempts are unsuccessful, the drive will
trip into FAULT LOCKOUT (LC), which requires a manual reset as described above.
47

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SCL/SCM DISPLAY MESSAGES

The following paragraphs describe the various displays and messages that can appear
on the SCL/SCM drive.
17.1

Speed Display

If the drive is in a STOP state (indicated by "- - -" on the display), and the commanded
speed is changed, the display will show the commanded speed, and the upper left decimal
point will turn on solid. About five seconds after a change is made, the display will begin to
alternate between the commanded speed value and the "- - -" display. If the Mode button
is pressed, the display will stop alternating and show the "- - -" display only.
When the drive is given a START command, the displayed speed will start increasing as
the drive accelerates up to the commanded speed. If the commanded speed is changed
while the drive is running, the display will show the commanded speed rather than the
actual speed, until the actual speed reaches the commanded speed.
If the commanded speed is changed faster than the drive can accelerate or decelerate,
the upper left decimal point will blink to indicate that the the drive is accelerating or
decelerating to the new speed. Once the actual speed reaches the commanded speed,
the upper left decimal point will turn on solid for 5 seconds and then turn off to indicate
that the commanded speed has been reached, and that the display is now showing the
actual speed.
17.2

Changing the Speed Reference Source

When the speed source is changed while the drive is running, the display will flash the
message for the new speed source to indicate that the new speed source is active. Also,
if the drive is being controlled from a speed source other than the  and  buttons (0-10
VDC, 4-20 mA, etc), and one of the  or  buttons is pressed, the display will flash the
present speed source message to indicate that the  and  buttons are invalid.
Example 1: The drive is running and the present speed source is the keypad. TB-13A is
programmed to select a 4-20 mA signal as the speed source. When TB-13A is closed to
TB-11, the display will flash “EI” to indicate that the speed source has changed to the 4-20
mA signal. If the contact between TB-13A and TB-11 is opened, the display will flash “CP”
to indicate that the speed source has changed back to the  and  buttons.
Example 2: The speed source is a 0-10 VDC signal. If the  or  button is pushed, the
display will flash “EU” to indicate that the present speed source is the 0-10 VDC signal
and that the  and  buttons are invalid.

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Refer to the following table for the possible speed reference source displays:
DISPLAY

SPEED SOURCE DISPLAYS
DESCRIPTION

CONTROL PAD: Speed is set using the  and  buttons on the front of the drive.

EXTERNAL CURRENT: Speed is controlled by a 4-20 mA signal wired to TB-25 and TB-2

EXTERNAL VOLTAGE: Speed is controlled by a 0-10 VDC signal wired to TB-5 and TB-2.

JOG: The drive is in Jog mode, and the speed is set by Preset Speed #2 (Parameter 32).

MOP (Motor Operated Pot): Contacts wired to TB-13B and TB-13E are used to increase
and decrease the drive speed.

Pr1 - Pr7

PRESET SPEEDS #1-7: Speed is set by the indicated Preset Speed (Parameters 31-37).

NOTE
The speed source displays will flash when the speed reference source is changed
while the drive is running to indicate that the new speed reference source is
active

17.3

Status and Warning Messages
STATUS AND WARNING MESSAGES

DISPLAY

DESCRIPTION

DC BRAKING: The DC braking circuit is activated.

“cE” will be displayed if an EPM with a different parameter version is installed and then
an attempt is made to change parameter settings without performing the TRANSLATE
function. Refer to PROGRAM SELECTION (Parameter 48).

CURRENT LIMIT: The output current has exceeded the CURRENT LIMIT setting
(Parameter 25) and the drive is reducing the output frequency to reduce the output
current. If the drive remains in CURRENT LIMIT for too long, it can trip into a CURRENT
OVERLOAD fault (PF).

ERROR: Invalid data has been entered or an invalid command was attempted.

“GE” will be displayed if an attempt is made to change the OEM default settings when
the drive is operating in the OEM mode (refer to Parameter 48).

If “GF” is displayed when a RESET OEM is attempted, it indicates that the OEM defaults
in the EPM are corrupted. If “GF” is displayed upon power-up, it indicates that the OEM
defaults and the user settings in the EPM are corrupted. Refer to Section 13.2.

FAULT LOCKOUT: The drive has failed three restart attempts and now requires a manual
reset.

SERIAL: The optional remote keypad is active as the user interface instead of the
buttons on front of the drive. Refer to Parameter 14 (CONTROL).

START PENDING: “SP” blinks during the interval between restart attempts.
DECEL OVERRIDE (both upper decimal points blinking): The drive has stopped decelerating
to avoid tripping into an HF fault due to regenerative energy from the motor.

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Notes

Lenze AC Tech Corporation
630 Douglas Street • Uxbridge, MA 01569 • USA
Sales: 800 217-9100 • Service: 508 278-9100
www.lenze-actech.com

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AC Tech SM Series VFD Drives Manual

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