Section 3 Sec3

User Manual: Section 3 DirectSOFT Quick Start

Open the PDF directly: View PDF .
Page Count: 5

Example Program

6

Building an Example Program

The pages that follow will explain how to do the following:

Dcreate a project

Duse the tool palette to enter instructions and build a ladder program

Duse “hot keys” to work faster

Denter nicknames and add comments

Dsetup an internal timer

Dsetup a self-resetting internal counter

Dcut and paste rungs of logic

Dsave your program to disk

Dcommunicate with your PLC

Dload your program into PLC memory

Dmonitor your program with the Data View

NOTE: The following program is given only to illustrate how some of the key features

of the software operate. This is not intended to teach you how to write ladder logic.

This example has four basic tasks:

1. Load a value into memory of your PLC that can be used as a preset for a timer.

2. Setup a self-resetting timer.

3. Use a counter to count the number of times the timer reaches the preset value

and resets.

4. Use Comparative Boolean relays to turn ON an internal coil when the counter

current value equals 5, and turn ON a second internal coil when the counter

current value equals 6.

END

OUT

OUT

OUT

OUT

DL105,

DL205

or

DL405

SP0

C2

CTA0

C1

DL305

LD K10

V2000

C0 TMR

T0

K100

CNT

CT0

V2000

CTA0

SP0

CT0

T0

END

K5

K6

=

=

C374

C162

CT601

C161

DSTR

K10

R400

C160 TMR

T600

K100

CNT

CT601

R400

CT601

C374

CT601

T600

K5

K6

=

=

OUT DOUT

The ladder logic shown below is the same program for the DL105/DL205/DL405

and DL305 families. As you work through the

Direct

SOFT screens to enter this

program in the pages that follow, the DL105/DL205/DL405 will be shown. If you

have a DL305 family PLC, substitute the proper elements and memory locations.

For example instead of entering SP0, you would enter C374.

T0 T600

What You Will

Learn

Example

Ladder Logic

Example

Example Program

77

When you click on the

Direct

SOFT icon from the

Direct

SOFT Windows Group, a

screen similar to the one shown below appears. You will notice a programming icon

in the upper left-hand corner. Click on this icon to enter your new project.

Click here to start

programming

You should now see the New Project window. You can name your project using any

combination of 8 characters (no spaces). Use “EXAMPLE1” for this example. Move

the selection bar to the PLC Family and CPU Type. For this example, use a PLC

belonging to the DL105/DL205/DL405 families. Click on OK after you have made

your Family and Type selections. If you have a DL305 type PLC, be sure and select it

instead from the choices. Keep in mind the available mnemonics, processing rules

and even the tool bar characteristics are tailored to the Family and Type selections

that you make.

New Project

Window

Type in a name

for your project

..then click on

OK

Select the

PLC Family..

Select the

CPU Type..

Step 1:

Enter the

Programming

Mode

Step 2:

Start a New Project

Example Program

8

After clicking OK to enter your project name, PLC family and CPU type, you will see

the skeleton ladder logic template. You are in the View Only Mode at this point. In

this mode, the cursor is always hollow and all you can do is browse.

View Only

Mode

(cursor is hollow)

You will want to use the Edit Mode for entering programs. This is accomplished by

holding down the control key and simultaneously pressing the letter E key (CTRL +

E). You could also click Edit on the top menu bar and then selected Edit Mode.

Direct

Soft indicates the Edit Mode is active when the cursor becomes solid and a

Tool Palette appears in the lower right portion of the screen.

In order to facilitate clear printing reproduction in this manual, you will also at this

time turn off the default 3-D Token for the ladder logic. You do this by clicking on View

and then Options. This is followed by clicking on the box labeled 3-D Token. This

removes the X in the box. To exit and record your selections, click on OK.

Edit Mode

(cursor is solid)

Tool Bar

Deselect this feature

to turn off the 3-D

ladder view look.

Step 3:

Switch to the

Edit Mode

Example Program

99

The Tool Palette can be very helpful, especially in the beginning while learning to

program in

Direct

SOFT. Later, you may prefer to use the faster Hot Keys instead of

clicking on the tool buttons themselves. The Hot Keys are shown below each

element symbol on the icon button. The expanded list is provided in the main

Direct

SOFT User Manual.

The Tool Palette shown below may not be exactly like the

one you have on your computer screen.

The tool palette shown depends on which

CPU your PLC is using. In this example, you will be using only the elements common

to all CPUs, therefore this will not be a problem.

Normally Open Contact Normally Closed Contact

Normally Open Immediate

Contact

Equal-To Contact

Greater-Than or

Equal-To Contact

Display Contact Setup

(Instruction Browser)

Display Box Setup

(Instruction Browser)

Wire Connection to Output

Normally Closed

Immediate Contact

Not-Equal-To Contact

Less Than Contact

Display Coil Setup

(Instruction Browser)

Element Browser

Wire Connection to Stage

Use the Tool Palette to enter the first instruction of the program. First move the

cursor to the desired location of the first element. A normally open contact needs to

be placed in the selected position to load the preset on the first scan. To do this, click

on the button that shows the normally open symbol. This will open a small input

window for setting up the contact.

Click here to

open input

window for

Normally Open

Contact

Move cursor to

where you want

the instruction

positioned.

The Tool Palette

Step 4:

Using the Tool

Palette to Enter

the First Element

Example Program

10

Use contact SP0 as the first element to load a preset into the PLC memory. SP0 is

used because you only need this rung to execute once, i.e. the first scan. Notice the

green/red indicator in the box. It will display the validation of each input. For

example, if you typed the letter O instead of the digit 0, the indicator would turn red

and stay red until you correct your mistake.

Enter SP0 to have

a contact that will

close on the first

scan only

Notice the Er-

ror Indicator

will glow green

if you enter a

valid contact

Click on the check mark (3) in the upper part of the input box when you have finished

typing in the element and have the green light. At that point, the instruction will be

entered. Notice the yellow vertical bar that appears next to the rung.

Since this is not

a color manual, you see a light gray vertical bar in the screen example shown below.

The yellow bar indicates you have entered an Instruction or instructions, but that you

have not compiled the rung yet by selecting Accept from the Edit menu. Rungs that

have already been accepted into compiled memory will have a green bar instead.

Without being compiled, you will not see the icons for Save to Disk or Save to PLC

enabled. This means in order to save your program anywhere you will have to

Accept your editing first. For example, if you wanted to stop working with

Direct

SOFT right now, you would first want to accept all the edited rungs so that you

could save the revised program to disk.

Yellow color coded

bar indicates the

rung has not been

accepted yet

The Save to Disk

icon is not available

because you have

not accepted your

editing yet

Step 5:

Using the SP0

Relay in Our

Program.