Nedap N V TRANSIT 2.4 GHz Microwave ID System User Manual MEMO
N. V. Nederlandsche Apparatenfabriek NEDAP 2.4 GHz Microwave ID System MEMO
User manual
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| Document ID | 279257 |
| Application ID | k9mgjKGkSdzo7eVbzc7Mtw== |
| Document Description | User manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
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| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 172.46kB (2155733 bits) |
| Date Submitted | 2002-10-28 00:00:00 |
| Date Available | 2002-10-28 00:00:00 |
| Creation Date | 2002-09-19 13:00:36 |
| Producing Software | Acrobat Distiller 5.0 (Windows) |
| Document Lastmod | 2002-10-24 16:33:21 |
| Document Title | MEMO |
| Document Creator | Acrobat PDFMaker 5.0 for Word |
| Document Author: | Ben van Zon |
TRANSIT-USA INSTALLATION GUIDE (For Extended and PS-270 versions) September 19, 2002 Part no : 9875220 This information is furnished for guidance, and with no guarantee as to its accuracy or completeness; its publication conveys no license under any patent or other right, nor does the publisher assume liability for any consequence of its use; specifications and availability of goods mentioned in it are subject to change without notice; it is not to be reproduced in any way, in whole or in part, without the written consent of the publisher. Version: 1.0, September 19, 2002 1 – Introduction. © Nederlandsche Apparatenfabriek N.V. (IDEAS- AVI) Parallelweg 2E P.O. Box 103 NL - 7140 AC Groenlo FCC ID : CGD TRANSIT The device complies with part 15 of the FCC rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference that may cause undesired operation. The products described in this document may be subject to modifications without corresponding updating of the document. © Copyright 2002 Nederlandsche Apparatenfabriek N.V. (IDEAS- AVI) © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 2-41 Version: 1.0, September 19, 2002 1 – Introduction. Contents 1 INTRODUCTION................................................................................................................................................................ 4 1.1 Characteristics................................................................................................................................................................ 4 1.2 Versions.......................................................................................................................................................................... 5 1.3 Safety precautions. ........................................................................................................................................................ 6 2 INSTALLATION............................................................................................................................................................ 7 2.1 Installation...................................................................................................................................................................... 7 2.2 Basic connections.......................................................................................................................................................... 8 2.3 Transceiver unit DIP-switch settings and indications and adjustments. ........................................................... 11 2.4 PS-270 connections, U-link & DIP-switch settings and indications. ................................................................. 14 2.5 Optional NX-500 board, TRANSIT Extended only. .......................................................................................... 22 3 COMMUNICATION INTERFACES. ................................................................................................................................. 25 3.1 Connections to inductive readers............................................................................................................................. 25 3.2 Connections via the special code emulation outputs. ........................................................................................... 25 3.3 Removing the optional communication boards..................................................................................................... 25 3.4 RS 232 (RS 232 III, Art. No.: 7806434) .................................................................................................................. 26 3.5 RS 422 (CM-422, Art. No.: 7811730) ...................................................................................................................... 27 3.6 Universal thin server. ( Art. No.: 7806434 ) ........................................................................................................... 28 3.7 Profibus DP (Art. No: 7817134) .............................................................................................................................. 29 4 APPLICATION INFORMATION ........................................................................................................................... 30 4.1 Available embedded software. .................................................................................................................................. 30 4.2 Coverage area............................................................................................................................................................... 30 4.3 Speed limitations. ........................................................................................................................................................ 31 4.4 Using more systems at the same location. .............................................................................................................. 31 4.5 Read range control TRANSIT-SUB. (Art. 7800150) ............................................................................................ 32 4.6 Typical situations......................................................................................................................................................... 34 4.7 Typical configurations................................................................................................................................................ 39 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 3-41 Version: 1.0, September 19, 2002 1 – Introduction. Introduction. A high level of performance, security, reliability and convenience is required in various control and monitoring systems. TRANSIT is a long-range automatic identification system. The TRANSIT reader communicates with a broad range of tags in all environmental conditions. TRANSIT is based on proven microwave technology in the 2.45 GHz ISM band and allows identification of tags at a distance up to 10 meters, even at high speeding passage. The NEDAP TRANSIT system features radio frequency identification equipment using modulated backscatter. In this method, the tags send there code to the reader by modulating and reflecting the signal transmitted by the reader. To reduce the influence of unwanted reflections, NEDAP applied circular polarization, which also allows orientation freedom of the tags. TRANSIT combines microwave identification and inductive identification in one unit. The system has the possibility to identify vehicle and persons caring NEDAP XS-cards. For this purpose a small inductive antenna can be connected to the reader. (Reflex-130) The combination of the small inductive antenna with TRANSIT is called the Gate-Master function. Special firmware will be needed see par 3.1 TRANSIT system has a wide range of tags for various applications. Lithium batteries energize the tag circuit, which gives lifetimes up to 10 years. Heavy-duty tag is developed for vehicle applications. The Window-tags can be mounted easily behind the windshield of a vehicle. The Booster-unit is a special Window-tag that can hold a NEDAP inductive identification card. The booster reads this card after activation by the driver. The information from the card is then transmitted to the microwave reader. Combi-booster is a combination of the Window-tag and the Booster-unit, which makes the identification of driver and vehicle possible. Pocket-tag is a microwave tag intended for the identification of people on large distances. 1.1 Characteristics. The TRANSIT consists out of stainless steel housing, covered by a synthetic material cover. Removing the two snake eye screws in the cover using a special tool can open this cover. After opening the unit the major components of the system are becoming visible. In the cover the Transceiver-unit is located, on the bottom of the stainless steel housing the Power-supply-unit is located. On the Power-supply-unit one of the optional communication boards can be placed. The backside of the unit hosts three PG-adapters respectively two PG-9, to be used for data communication cables, and one PG-13 adapter to be used for Mains connections. PG-adapters for mains and data © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 4-41 Version: 1.0, September 19, 2002 1.2 1 – Introduction. Versions. Version Description Article number. TRANSIT 120 Vac USA PS-270 Special version with PS-270 for parking systems 9875220 TRANSIT 120 Vac USA Extended PS-270 Extended version of TRANSIT for access control systems and parking systems. t.b.d. Opened Cover Frequencyselect DIP switches Transceiver unit Location optional com. Board Optional NX-500 SimpleXS board. Trans-IT Extended ONLY Rubber seal Stainless steel housing Power supply unit PS-270 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 5-41 Version: 1.0, September 19, 2002 1.3 1 – Introduction. Safety precautions. The following safety precautions shall be observed during normal use, service and repair. • The TRANSIT shall be connected to safety ground. • Disconnecting from main power supply before removing any parts. • The TRANSIT shall only be installed and serviced by qualified personnel • To be sure of safety, do not modify or add anything other than mentioned in this manual or indicated by NEDAP NV. • Replace fuses only with the same type and rating. • Connecting the TRANSIT to the 120 Vac mains shall be in accordance with one of the two options shown in the figures below. • The safety switch shall be a two-pole switch, disconnecting the line and neutral, with a contact distance of at least 3-mm. Safety switch 120 Vac Installation connection box Fixed wiring 120 Vac 120 Vac wall socket 120 Vac plug Maximum cable length 2 meters © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 6-41 Version: 1.0, September 19, 2002 2 – INSTALLATION INSTALLATION 2.1 Installation. The TRANSIT reader can be installed in any position. Normally the reader shall be mounted in a horizontal position, then the coverage area in the horizontal plane is maximized. In some applications a vertical installation is required to make use of the smaller beam width in the vertical plane. The mounting brackets which make rotation in the vertical and horizontal plane possible is standard included in every TRANSIT. The following mast mounting part is available for the TRANSIT. Part • Mast mounting set Description NEDAP article number Universal mast mounting set for square and round masts. Max. 150 mm square and max. 190 mm round 5626595 +/- 30º 2.1.1 Mast mounting. 310 mm 190 mm max TRANSIT 150 mm max 245 mm Mast mounting set Extension bracket © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO 30 mm Page 7-41 Version: 1.0, September 19, 2002 2.1.2 2 – INSTALLATION Wall mounting. Turn angle +/- 30º 245 mm Turn angle +/- 45º 107 mm 252 mm 100 mm 100 mm 9 mm 310 mm 2.2 Basic connections. 120KHZ MOD RELAY CONT Reader disable HOST COM Host system Any NEDAP inductive reader © NEDAP IDEAS – AVI External antenna Reflex-130 P.O. Box 103, NL-7140 AC GROENLO Reflex-130 INT MAINS Page 8-41 Version: 1.0, September 19, 2002 TRANSIT Basic connections 2 – INSTALLATION Cable type Max length Functional description Signal names System power supply. The safety ground shall be connected directly to the chassis. System power supply. MAINS • MAINS-IN 3 * 0.75 mm2 N/A. • DC-SUPPLY 2 * 1.5 mm2 N/A RELAY CONT 3 * 0.75 mm2 25Vdc, 2 A Relay contacts normally 120Vac, open, center contact and normally closed. 1A COM NC NO Reflex-130 INT 4 * 0.25 mm2 shielded Maximum Connection to the 15 meter external inductive antenna Reflex-130. HF+ HFUL GND NA 120VAC-L 120 VAC-N Safety Ground +24VDC GND HOST-COM • B-W-O-OUT 4 * 0.25 mm2 shielded Maximum Detected tag numbers 50 meter are packed according the Bar-code-39, Wiegand26 or Omron-7811-2 protocol. Selected by EEPROM O-1 O-2 O-3 GND • RS 232-C 3 * 0.25 mm2 shielded cable capacity <= 100 pF/meter Maximum When STANDARD 15 meter communication board is placed. TX GND RX • RS-422 4 * 0.25 mm2 shielded cable capacity <= 100 pF/meter Maximum When OPTIONAL 1200 meter communication board is placed. TXTX+ RXRX+ GND © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 9-41 Version: 1.0, September 19, 2002 TRANSIT Basic connections Reader disable 2 – INSTALLATION Cable type Max length Functional description Signal names 2 * 0.25 mm2 Maximum Use always a relay shielded 15 meter contact to connect the internal 5 Vdc to the Reader disable input. Rdis 5V Using an external 5 Vdc voltage can damage the unit 120KHZ MOD © NEDAP IDEAS – AVI Coax RG58U Maximum Connects any external 100 meter NEDAP inductive reader to the TRANSIT. The TRANSIT shall modulate the received tag data on the 120 kHz signal from the inductive reader. By doing this it looks as if the TRANSIT is an inductive antenna for the external inductive reader. P.O. Box 103, NL-7140 AC GROENLO HF+ HF- Page 10-41 Version: 1.0, September 19, 2002 2.3 2 – INSTALLATION Transceiver unit DIP-switch settings and indications and adjustments. 2.3.1 DIP switch settings. FREQ SEL SW-1 DIP-switch Transceiver unit • SW-1 Switch type Function 5 bit dip switch Description Frequency selection. LSB changes results in 600 kHz frequency changes. Switch number S-1 S-2 S-3 S-4 S-5 Channels select within sub band. Channels select within sub band. Channels select within sub band. Channels select within sub band. Sub band selection. Frequency selection table. SUBBAND 5 S-5 SW1 © SUBBAND 6 S-5 SW1 Frequency kHz S-1 S-2 S-3 S-4 Frequency kHz S-1 S-2 S-3 S-4 2.438.400 2.448.000 2.439.000 2.448.600 2.439.600 2.449.200 2.440.200 2.449.800 2.440.800 2.450.400 2.441.400 2.451.000 2.442.000 2.451.600 2.442.600 2.452.200 2.443.200 2.452.800 2.443.800 2.453.400 2.444.400 2.454.000 2.445.000 2.454.600 2.445.600 2.455.200 2.446.200 2.455.800 2.446.800 2.456.400 2.447.400 2.457.000 NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 11-41 Version: 1.0, September 19, 2002 2.3.2 2 – INSTALLATION Transceiver unit indications. PLL LOCKED D-7 Indications Transceiver unit • © PLL LOCKED Indication type Dual color LED NEDAP IDEAS – AVI Description Red indicates PLL is unlocked. Green indicates PLL is locked. P.O. Box 103, NL-7140 AC GROENLO Indication number D-7 Page 12-41 Version: 1.0, September 19, 2002 2.3.3 2 – INSTALLATION Transceiver unit adjustments. FREQ FINE C-105 DD ADJ P-4 TX-PWR ADJ P-2 AGC LEVEL P-3 Adjustments Transceiver unit Adjustment type Function Description Adjustment number • FREQ FINE Trim cap. Factory setting Fine tuning reference frequency for synthesizer. C-105 • TX-PWR Trim pot. Customer setting • DD-ADJ Trim pot. • AGCLEVEL Trim pot. © NEDAP IDEAS – AVI Reduction transmitter power by maximum 20 dB. Maximum EIRP < 18 dBm . P-2 Factory setting Received data duty cycle correction. P-4 Factory setting AGC reference level adjustment. P-3 P.O. Box 103, NL-7140 AC GROENLO Page 13-41 Version: 1.0, September 19, 2002 2.4 2 – INSTALLATION PS-270 connections, U-link & DIP-switch settings and indications. Reflex-130 INT K16 Reader disable K7-3.K7-4 When relay is powered the read function is disabled. B-W-O-OUT GND K7-5 B-W-O-OUT K4-1..K-3 Door-contact K4-4..K4-5 OPT COM INT K2 RELAYCONT K6 DATA-CNTL K14 120 KHZ MOD K1-1..K1-2 TX-CONT K1-3..K1-5 EXT-MODUNIT K11 DC-SUPPLY K10 DC-PWR K8 MAINS-OUT K5 MAINS-IN K3 PLACE THIS CONNECTION WHEN DOOR CONTACT IS NOT USED ! K4-4 -> K4-5 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 14-41 Version: 1.0, September 19, 2002 2.4.1 2 – INSTALLATION PS-270 connections. PS-270 connections Connector type Function Description • Reflex-130 INT (K16) 5-p mkds phoenix External 120 kHz antenna con. connection 120 kHz antenna con. Reflex-130 LED cont. high pos. ID Ground LED cont. high neg. ID • Reader disable (K7-1..K7-4) 5-p mkds phoenix Controls Spare the flow of Spare data to the Reader disable controller. +5 Vdc connection Signal names Pin number HF+ HFUL GND NA R-dis 5V • B-W-O-OUT (K7-5) 5-p mkds phoenix Code emulation. Output for Omron, Wiegand and Barcode. GND • B-W-O-OUT (K4-1..K4-3) 5-p mkds phoenix Code emulation. Output for Omron, Wiegand and Barcode Ground O-1 O-2 O-3 • Door contact (K4-4..K4-5) 5-p mkds phoenix Door contact Door contact Ground Door GND • RELAY-CONT (K6) 3-p mkds phoenix Floating relay contacts Center contact Normally closed contact Normally open contact COM NC NO • DATA-CNTL (K14) 6 wire flat cable Internal PCB connector connection Micro Match to transceiver unit Ground connection Spare TTL received tag data Received signal strength TTL signal PLL locked TTL signal enable TX GND Det-data-out U-AGC Locked TX-enable HF+ HF- • 120 KHZ-MOD (K1-1..K1-2) 2-p mkds phoenix 120 kHz 120 kHz connection input from 120 kHz ground con. external NEDAP inductive reader © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 15-41 Version: 1.0, September 19, 2002 PS-270 connections 2 – INSTALLATION Connector type Function Description Signal names Pin number • TX-CONT (K1-3..K1-5) 2-p mkds phoenix Transmitter control Ground for control sign. TTL signal PPL locked TTL input to enable TX GND LCK TXD • EXT-MODUNIT (K11) 3-p mkds phoenix Connects received tag data to external reader Isolated ground. Optical isolated current loop connection. 5 Vdc supply optocoupler. GND CLS +5V • DC-SUPPLY (K10) 2-p mkds phoenix External External 24 Vdc input DC power External DC supply connection ground. +24Vdc GND • MAINS-OUT (K5) 2-p mkds phoenix Internal 120 Vac output line. connection 120 Vac output neutral to NX-500 optional board. 120Vac 120Vac • MAINS-IN (K3) 2-p mkds phoenix External 120 Vac input line AC power 120 Vac output neutral connection 120Vac 120Vac • DC-PWR (K8) 10 wire flat cable PCB connector Micro Match. Internal connection to transceiver unit. Ground connection. +15 Vdc connection +15 Vdc connection Ground connection. -15 Vdc connection -15 Vdc connection Ground connection. + 5 Vdc connection + 5 Vdc connection Ground connection. 10 rr © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 16-41 Version: 1.0, September 19, 2002 PS-270 connections • © 2 – INSTALLATION Connector type OPT COM INT 14 pen male connector 15.8 (K2) mm NEDAP IDEAS – AVI Function Description Connection to optional communication board. Not connected. TTL TX-data com. TTL RX-data com. Ready to send Cleared to send. Ground Ground 5 Vdc output RS 485 I/O toggle signal. Not connected. Ground 24 Vdc output for com. board. Not connected. Not connected P.O. Box 103, NL-7140 AC GROENLO Signal names Pin number TX RX RTS CTS GND GND XV5P I/O GND XV24P 10 11 12 13 14 Page 17-41 Version: 1.0, September 19, 2002 2.4.2 2.4.2.1 2 – INSTALLATION PS-270 U-Link & DIP-switch settings. U-links. DIP SWITCH SW-1 Range beep on/off K-15 DATA / DATA* controller K-9 DATA / DATA* modulator K-12 Inductive Mod select K-13 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 18-41 Version: 1.0, September 19, 2002 PS-270 U-link settings • • • • 2 – INSTALLATION U-link position Invert microwave data Range beep function Inverts inductive modulator data Inductive Mod select U-link number K-9 Inverts uWave TTL data (default position) Inverts uWave TTL data. K-15 Selects range beep function off. (default position) Selects range beep function on. Inverts TTL data from uW-receiver and inductive-receiver to modulator. (default) Inverts TTL data from uW-receiver and inductive-receiver to modulator. K-12 Selects modulator setting for voltage coupled receivers. K-13 2.4.2.2 Description Selects modulator setting for current coupled receivers. (As is needed for the NX500 or SimpleXS) (default) DIP-switch SW-1 settings. Refer for the DIP-switch settings to the manual of the loaded firmware. © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 19-41 Version: 1.0, September 19, 2002 2.4.3 2 – INSTALLATION PS-270 indications. DOOR CLOSED D-15 STS ID D-14 NA UL D-6 RXLEVEL D-28..D-30 DCRAW D-17 RANGE BUZZER X-1 PLL LOCKED D-2 +5 Vdc PRESENT D-22 -15 Vdc PRESENT D-23 +15 Vdc PRESENT D-24 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 20-41 Version: 1.0, September 19, 2002 PS-270 Indications 2 – INSTALLATION Indication type • RX-LEVEL LED red • DC-RAW • Description Indication number LED bar indicating the received tag signal strength. D-28..D30 LED green LED active indicates that the DC supply is present. D-17 PLL LOCKED LED green LED active indicates PLL is locked. D-2 • +5 Vdc PRESENT LED green LED active indicates that this voltage is present. D-22 • -15 Vdc PRESENT LED green LED active indicates that this voltage is present. D-23 • +15 Vdc PRESENT LED green LED active indicates that this voltage is present. D-24 • NA UL LED indicates that the TRANSIT is standby and the door is locked LED indicates that a tag is detected, shall stay active during unlock time. The door is unlocked. D-6 • Dual color LED= red Dual color LED= green • STS • ID • • © D-6 Dual color LED indicates that processor is running by showing heartbeat LED= red (blinking). Dual color LED active during tag recognition (fast blinking). LED= green D-14 DOOR CLOSED LED red LED active indicates door contact closed. D-15 RANGE BUZZER Sound When activated by U-link K-15 and a valid tag is present the beep repeat frequency gives an indication for the received signal strength from the tag. X-1 NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO D-14 Page 21-41 Version: 1.0, September 19, 2002 2.5 2 – INSTALLATION Optional NX-500 board, TRANSIT Extended only. OPT COM INT K4 D5 RELAY ACTIVATED D4 DOOR CONTACT Reflex-130 INT K2-11..K2-16 D3 PORTER CONTACT DOOR CONTACT K2-9 .. K2-10 24 Vdc FUSE 1A SB MANUAL RELEASE K2-8 .. K2-9 D2 DETECTION STATUS RELAY CONT K2-5 .. K2-7 D1 PROG. STATUS 24 Vdc OUT K2-3 .. K2-4 24 Vdc FUSE 1A SB 24 VDC IN K2-1..K2-2 MAINS FUSE 0.3A SB MAINS-IN K1 PLACE THIS CONNECTION WHEN DOOR CONTACT IS NOT USED! K2-9->K2-10 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 22-41 Version: 1.0, September 19, 2002 2.5.1 © 2 – INSTALLATION Connections. NX-500 Connections Cable type Max length Functional description Pin number Signal names MAINS-IN (K1) 3 * 0.75 mm2 N/A. System power-supply. The safety ground shall be connected directly to the chassis. 120VAC-L 120 VAC-N Safety Ground 24 VDC IN (K2-1 .. K2-2) 2 * 0.75 mm2 N/A System emergency power-supply. +24VDC GND 24 VDC OUT (K2-3 .. K2-4) 2 * 0.4 mm2 Maximum DC supply intended for 100 meter lock control +24VDC GND RELAY CONT (K2-5 .. K2-7) 3 * 0.75 mm2 25Vdc, 2 A Relay contacts normally 120Vac, open, center contact and normally closed. 1A NC COM NO MANUAL RELEASE (K2-8 .. K2-9) 2 * 0.25 mm2 Maximum Connect to push button 100 meter to indicate manual door release. PORT GND DOOR CONTACT (K2-9 .. K2-10) 2 * 0.25 mm2 Maximum Connect to door contact 100 meter To indicate door closed 10 GND DOOR Reflex-130 INT (K2-11 .. K2-16) 5 * 0.25 mm2 shielded Maximum Connection to the 50 meter external inductive antenna Reflex-130. 11 12 13 14 15 16 HF+ GND UL GND NA IND NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 23-41 Version: 1.0, September 19, 2002 NX-500 Connections Cable type OPT COM INT (K2) 2.5.2 2 – INSTALLATION Max length 14 pin male Conconnector 15.8 nection to mm. optional communication board. Functional description Pin number Signal names Not connected. TTL TX-data com. TTL RX-data com. Ready to send Cleared to send. Ground Ground 5 Vdc output RS 485 I/O toggle signal. Not connected. Ground 24 Vdc output for com. board. Not connected. Not connected TX RX RTS CTS GND GND XV5P I/O 10 11 12 GND XV24P 13 14 Indications. NX-500 Indications PROG. STATUS Indication type LED red DETECTION LED green STATUS Description Indication number 1 sec on / 1 sec off : Program is operational 1 short flash: Not enough RAM. 2 short flashes: RAM failure. 3 short flashes: EPROM failure D-1 FLASH: Transponder/XS-card detected; authorized and not authorized. D-2 PORTER CONTACT LED green Activated when manual door-release button activated. D-3 DOOR CONTACT LED green Activated when door contact is closed. D-4 RELAY ACTIVATED LED green Activated when relay is activated. D-5 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 24-41 Version: 1.0, September 19, 2002 3 – Communication interfaces. Communication interfaces. 3.1 Connections to inductive readers. The TRANSIT features two ways to connect it to external inductive NEDAP readers. • Bringing the 120 kHz antenna signal of the external inductive reader to the TRANSIT and connecting it to 120 kHz-MOD connector of the Power supply unit (K1-1 and K1-2). The TRANSIT will modulate the received tag data on the 120 kHz antenna signal of the external inductive reader. The TRANSIT looks for the external inductive reader as an antenna. This feature makes the application of the TRANSIT simple in existing installations. To optimize the quality of the modulating signal the modulation depth can be selected in accordance with the type of receiver used in the external inductive reader. The U-Link setting: “ Inductive Mod select, K-13”, on the Power supply unit allows for the selection between voltage- or current coupled receivers. Contact NEDAP when in doubt which kind of external inductive receiver you want to connect to the TRANSIT system. • Remember that when using the modulation function of the TRANSIT on the 120 kHz antenna signal of an external inductive reader, to select external antenna (tuning) on this inductive reader. For the Accessor III-A and Accessor III-B for example this shall be realized by setting J1 in the external position. 3.2 • The outputs OUT-1, OUT-2 and OUT-3 used for the emulated output for Wiegand 26, Omron, Barcode and others are vulnerable for large potential differences. Care shall be taken to connect always the ground of the receiving system to the TransIT and use shielded cable. 3.3 • © Connections via the special code emulation outputs. Removing the optional communication boards. Remove the optional communication boards only when the TransIT is disconnected from the mains supply, not doing this will damage the communication board. NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 25-41 Version: 1.0, September 19, 2002 3.4 3 – Communication interfaces. RS 232 (RS 232 III, Art. No.: 7806434) RX-LED RS232 3 pin CON K-3 TX-LED D25 CON K-2 Internal interface RS 232 III OPT-COM INT K-1 Connector type Function Description Signal names Pin number See par 3.1.3.2 See par 3.1.3.2 • OPT COM INT 14 pen male connector 15.8 (K2) mm • RS232 3 pin CON K-3 3 pin WECO PCB RS 232 Transmit (output) connection Ground Receive (input) Tx GND Rx • D25 CON K-2 D25 connector female RS 232 Transmit (output) connection Receive (input) Do not connect. Do not connect Ground (shield) Identifier (max 100 mA) Do not connect Tx Rx RTS CTS GND +5Vdc DTR 20 © NEDAP IDEAS – AVI ConnecSee par 3.1.3.2 tion to Powersupply unit. P.O. Box 103, NL-7140 AC GROENLO Page 26-41 Version: 1.0, September 19, 2002 3.5 3 – Communication interfaces. RS 422 (CM-422, Art. No.: 7811730) OPT-COM INT K-2 D25 CON K-1 TX LED RX LED • The CM 422 board has galvanic isolation. • Maximum data rate 9600 baud. • The LED’s are indicating respectively that data is being transmitted (Tx) and data being received (Rx). • The RX- and RX+ lines are always terminated with a 120 Ω resistor. • The TX- and TX+ lines have to be terminated at the host side. • Connection to host: • RX+ => TX- (host) • RX- => TX+ (host) • TX+ => RX- (host) • TX- => RX+ (host) Internal interface CM 422 Connector type • OPT COM INT 14 pen male connector 15.8 K-2 mm • D 25 CON K-1 © NEDAP IDEAS – AVI Function Description ConnecSee par 3.1.3.2 tion to Power supply unit. D25 connector RS 422 Receive* (input) female connection Receive (input) Transmit* (output) Transmit (output) P.O. Box 103, NL-7140 AC GROENLO Signal names Pin number See par 3.1.3.2 See par 3.1.3.2 RXRX+ TXTX+ 15 17 19 25 Page 27-41 Version: 1.0, September 19, 2002 3.6 3 – Communication interfaces. Universal thin server. ( Art. No.: 7806434 ) The Universal Thin Server (UTS) is designed to connect NEDAP RF-ID devices with a serial interface to an Ethernet network using the TCP/IP protocol. The Ethernet network interface speed is 10-Mbit. 3.6.1 3.6.1.1 LED Status Display Yellow and Green LED The green LED displays the status of the serial channel (the red LED will be off while in normal operation). Stable color : Channel idle, no connection Blinking, 1 sec cycle : Connected over the network 3.6.1.2 Red LED If the red LED is on or blinking, the green LED will give a diagnostics code. There is a fatal error, and the UTS is not working. Red LED stable on, green LED blinking: 1x: EPROM-checksum error 2x: RAM-error 3x: Network controller error (Token Ring) 4x: E²PROM checksum error or bad 5x: IP address already used on network Red LED blinking, green LED blinking: 4x: The network connection is faulty. This code should only appear after power up. Even though the UTS is going into operation mode, the problem will potentially persist. 5x: No DHCP response was received. See user manual Universal Thin Server for detailed information © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 28-41 Version: 1.0, September 19, 2002 3.7 3 – Communication interfaces. Profibus DP (Art. No: 7817134) Power Led (Red) Profibus Socket Fuse T315 mA 250 Volt Grounding Tab Station address (X1) Profibus Led (Red) Station address (X10) EPROM Socket Status Led (Green) Profibus Indications Function • Profibus socket • Address setting Station address X1 and X10 • Power LED Indication Red • Status LED Indication Green • Profibus LED Indication Red • Grounding tab Earth connection • Fuse • Eprom socket © NEDAP IDEAS – AVI Connection for Profibus Cable Overload protection Description Here the Profibus Cable must be connected With these two rotation switches a station address from 0 –99 can be selected. Use switch X1 to select the units an x10 to select the tens. Addresses lower then 3 are mostly used by the Profibus master so it is recommended not to use the values 0 – 2. This LED indicates that power is available. This LED should always be on as soon as power is turned on. This LED indicates the status of the Profibus DP Interface Module and should always blink. The status is indicated by the on and off time of the LED. See manual for all possible status indications. This LED will be on when the Profibus master recognizes the interface module. When this LED is off then this mostly indicates an error at the Profibus master I connected to Profibus cable shield and must be connected to ground. Protects the galvanic isolated Profibus circuit. Fuse is blown when Power LED is off and status LED is still blinking. Here the Eprom with the embedded software will be inserted. P.O. Box 103, NL-7140 AC GROENLO Page 29-41 Version: 1.0, September 19, 2002 4 – APPLICATION INFORMATION APPLICATION INFORMATION 4.1 Available embedded software. The TRANSIT communication features are defined by the firmware loaded in to the micro controller located on the Power supply unit PS-270. The micro controller is a Micro Chip PIC 16F876-20I / SP (NEDAP Art. No.: 2802260). For every firmware version an installation guide is available. The firmware can be loaded and upgraded in the PIC using a special software tool. Contact Nedap for the possibilities. 4.2 Coverage area. Transponder Line of sight 45 ° Maximum range 10 m 5m The TRANSIT system operates in the 2.4 to 2.45 GHz ISM band. The labels used with the TRANSIT system are all equipped with lithium battery’s to power the internal logic. The labels do not contain a transmitter but are using the received power from the reader, after modification, for re-transmission to the reader. This principle is called modulated backscatter The labels are so called field modifying devices. The received RF power from the reader is modulated with the data from the chip containing the ID-number. To read a label there has to be a line of side to the label from the reader. Most synthetic materials are transparent for RF energy with little attenuation and are forming no obstruction. Snow and ice are no problem as long as it is in crystal form. Closed water films are a problem for the detection range. Heavy rain shall be no problem as long as there is no closed water film on the TRANSIT front cover or on the label. To reduce the influence of unwanted reflections circular polarization is used, this brings also rotation freedom for the label. Placing the labels on metal surface is not influencing the read range. One has to keep in mind that the misalignment is most of the time present in two planes. This makes simple evaluation of the coverage area difficult. A computer model has been developed in which most geometry’s can be evaluated. Contact Nedap when in doubt. The antenna diagram of the TRANSIT has a vertical beam width of 40° and a horizontal beam width of 80°. The labels are having a symmetrical diagram, 80° in the horizontal and vertical plane. The coverage area is based on the combination of the two diagrams. When defining the reading range between reader and label one should take in account the misalignment between reader and label. Good practice is to reduce the read range by a factor of two when the label is on the –3 dB points of the reader antenna and the normal on the label still parallel to the main axes of the reader. One has to keep in mind that the misalignment is most of the time present in two planes. This makes simple evaluation of the coverage area difficult. A computer model has been developed in which most geometries can be evaluated. Contact Nedap when in doubt. In par. 4.5 the detection area for a number of practical situations is given. © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 30-41 Version: 1.0, September 19, 2002 4.3 4 – APPLICATION INFORMATION Speed limitations. The maximum speed a transponder can pass the reader antenna and the transponder can be read is depended on the following factors: Item Typical value • Length of the detection trajectory. 6 meter • Distance between reader and tag. 5 meter • Number of valid frames needed for valid read. • Length of code. • Data rate • Frame time 64 bits 1.875 KBPS 34 msec In this situation a maximum speed of 200 km/hour can be allowed. For every other geometry one should carefully consider the above mentioned parameters before a specification on the maximum speed is defined. This speed can ONLY be obtained with firmware in the 54 bit detection mode, see firmware user manuals. 4.4 Using more systems at the same location. When two or more systems are within a range of 15 meters, these systems should have a frequency offset of at least 600 kHz with respect to each other. The frequency should be factory set. When in doubt or when two readers are ‘looking’ to each other, frequency offset is recommended. This frequency offset has to stay within the local radio regulations. When two readers are heaving a frequency offset they can be mounted close together and they can read the same label at the same time. © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 31-41 Version: 1.0, September 19, 2002 4.5 4 – APPLICATION INFORMATION Read range control TRANSIT-SUB. (Art. 7800150) Until now to only possible way to reduce the reading distance of the TRANSIT in a controlled way was the use of so called reference transponders. A transponder without the correct customer code was placed in the reading area in such a way that only transponders which had a return signal stronger then this reference transponder could be recognized by the TRANSIT. Due to the fact that it is not always possible to find a good position for a reference transponder or due to the fact that it is not possible to use a reference transponder from a cost or esthetical stand point the TRANSIT SUB ( Squelch Upgrade Board) was developed. TRANSIT SUB is a small PCB board which can be build into any TRANSIT. TRANSIT SUB makes use of the already available AGC voltage (Automatic Gain Control Voltage) present in the Transceiver unit. This AGC- voltage represents the received signal strength of a transponder in front of the TRANSIT. When the orientation is fixed and no changes are present in the propagation path when the transponder is approaching the TRANSIT, this AGC voltage is a good measure for the distance between TRANSIT and transponder. For the TRANSIT’s equipped with the PS-270 Power-supply and the firmware P-61, Q-70 and P-70 there is the possibility to set the squelch reference level by means of commands via the serial data communication channel when the DC2/DC4 asynchronous protocol is selected. 4.5.1 Content TRANSIT retrofit kit. • 1x Printed circuit board TRANSIT SUB. (article 7800150) • 3x Adhesive printed circuit board mounting supports. • 1x 10 wire flat wire cable of approximately 100 mm. • 1x 6 wire flat wire cable of approximately 100 mm. • 3 colored wires for connecting the TRANSIT SUB to the PS-270 power supply unit. WARNING: When the TRANSIT SUB is placed and minimum squelch level is selected the maximum read range can be shorter then without the TRANSIT SUB. © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 32-41 Version: 1.0, September 19, 2002 4.5.2 4 – APPLICATION INFORMATION Theory of operation. When a transponder is moving towards the TRANSIT the received signal strength will change as function of distance. It should be clear that also tag orientation with respect to the TRANSIT reader determines the received signal strength. The AGC voltage (U-agc, agc = automatic gain control) is proportional to the received signal strength. TRANSIT SUB compares this voltage to an user settable reference voltage. This reference voltage is called the squelch level (SQ-level). When U-agc < SQ-level the squelch is active (SQ-ON) and the received transponder signals are suppressed. When Uagc > SQ-level the squelch is not active (SQ-OFF) and the received transponder signals are normally processed. U-agc SQ-level U-agc > SQ-level U-agc < SQ-level SQ-OFF 4.5.3 SQ-ON Squelch level setting. The TRANSIT SUB has two ways of setting the squelch level (SQ-level); locally or remotely . Locally the squelch level can be set by means of potentiometer P-2 when the U-links K-7 and K-6 are set for position 2. Remotely the squelch level can be set by means of software commands, when the U-links K-7 and K-6 are set for position 1, which are controlling a so called DCP (digitally controlled potentiometer). The DCP has 100 positions and controls in this way a dynamic range of approximately 70 dB which means per step 0.7 dB in transponder return signal. Due to the fact that there is no linear relation between the transponder return signal and the distance the following relation between DCP step and distance is valid. Transponder Distance meter Change in distance for 1 step DCP in cm 10 15 25 The DCP rate of change when commanded up or down can be selected between fast and slow. Default is slow. To step through the complete dynamic range (100 steps) between 100 and 50 seconds is needed in SLOW mode. To step through the complete dynamic range (100 steps) between 20 and 17 seconds is needed in FAST mode. For more detailed information refer to Manual TransIT-SUB © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 33-41 Version: 1.0, September 19, 2002 4.6 4 – APPLICATION INFORMATION Typical situations. 4.6.1 Introduction. In the following diagrams a contour plot is shown of the received label signal. This contour plot gives always the top view of the situation. The position of the reader is always at 0,0. The label is positioned in a area of 10 by 10 meter. The scale of the plot is such that every square has a dimension of 1 by 1 meter. The minimum signal needed from the label is –100 dBm. This means that the area inside the –100 dBm contour represents the detection area. The following parameters are used within the examples: Parameter Description. R-height D-angle Mounting height of the TRANSIT reader with respect of the ground. Angle over which the reader is rotated in the vertical plane. When D-angle is 0 degrees the reader ‘looks’ parallel to the ground. When D-angle is 90 degrees the reader is ‘looking’ straight down. Angle over which the reader is rotated in the horizontal plane. Mounting height of the transponder with respect to the ground. Angle over which the label is rotated in the vertical plane. When L-angle is 90 degrees the label is ‘looking’ parallel to the ground. When L-angle is 0 degrees the label ‘looks’ straight up. A-angle L-height L-angle 4.6.2 Example 1. Received power : -100 dBm minimum 10 Parameter Value R-height D-angle 100 100 A-angle L-height L-angle 0° 0° 90° 90 90 100 100 This example shows the ideal situation the reader is positioned at the same height as the label. This figure can be used for approaching labels as for labels passing at certain distance in front of the reader. 110 110 80 90 90 70 120 110 100 80 60 50 130 140 100 110 120 130 140 Rpow © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 34-41 Version: 1.0, September 19, 2002 4.6.3 4 – APPLICATION INFORMATION Example 2. Received power : -100 dBm minimum 10 Parameter 140 140 130 R-height D-angle 120 120 130 A-angle L-height L-angle 110 110 45° 0° 90° 120 100 Value 130 120 110 120 By placing the reader on a height of 3 meters and not adjusting the vertical angle of the label, we see a strong reduction in the detection area. 90 110 130 100 90 140 100 120 150 130 120 190 180 170 130 110 160 150 140 160 140 150 170 180 190 Rpow 4.6.4 Example 3. Received power : -100 dBm minimum 10 140 Parameter 140 130 130 R-height D-angle 120 120 A-angle 130 L-height L-angle 110 110 120 100 90 110 80 120 110 90 100 80 90 130 100 160 150 120 140 130 110 120 140 150 160 45° 0° 45° By letting the label look up 45° the detection area increases. Due to the reader D-angle of 45° at a height of 3 meters and a label height of 1 meter the maximum of energy is approximately 2 meters before the reader. This maximum could be placed much further out to improve the detection area. 120 100 Value Rpow © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 35-41 Version: 1.0, September 19, 2002 4.6.5 4 – APPLICATION INFORMATION Example 4. Received power : -100 dBm minimum Parameter 10 110 105 R-height D-angle 110 100 A-angle L-height L-angle 100 105 Value 105 95 15° 0° 45° 110 105 100 115 100 90 120 115 110 95 90 125 95 110 105 135 150 145 160 155 180 175 170 115 130 140 100 110 125 120 105 120 115 125 130 135 140 By reducing the reader down look angle (Dangle) to 15° the range is again improved. 145 150 155 160 180 170 175 125 160 165 145 150 155 135 140 125 130 115 120 110 135 140 120 130 105 145 150 160 155 165 Rpow 4.6.6 Example 5.0 Received power : -100 dBm minimum 10 Parameter Value 120 R-height D-angle 120 100 100 110 A-angle 110 140 140 L-height L-angle 160 150 130 140 130 120 160 130 80 130 120 140 130 This example shows the detection area when the TRANSIT reader is placed 90 degrees rotated. This means that the smaller beam width is in the horizontal plane. This results in a much narrower detection area which can be necessary in certain applications. 130 140 120 130 130 130 130 70 80 120 110 100 90 60 90 140 130 100 110 120 90° 140 140 150 150 110 140 0° 160 100 140 110 150 150 160 160 150 0° 90 90 100 150 150 120 150 Rpow © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 36-41 Version: 1.0, September 19, 2002 4.6.7 4 – APPLICATION INFORMATION Example 6. Received power : -100 dBm minimum 10 150 155 145 145 150 160 150 165 165 155 160 165 165 160 155 150 170 180 175 170 160 155 150 140 145 140 125 130 120 155 170 R-height D-angle 180 170 175 150 145 140 135 130 A-angle 135 125 L-height L-angle 120 115 110 120 Parameter 160 145 115 125 165 130 135 155 160 165 110 Value 90° 0° 0° 105 115 100 105 110 105 100 95 100 This is a situation were the reader sits on the ceiling 8 meters above a door. The reader position is 0, 2. The labels is at a height of 1 meter and is looking straight up. 95 95 110 105 110 100 Rpow 4.6.8 Example 7. Received power : -100 dBm minimum 10 145 150 160 160 155 Parameter 120 140 155 130 135 140 130 120 125 135 125 115 110 150 R-height D-angle 115 A-angle 105 145 L-height L-angle 120 110 140 135 130 125 130 120 115 110 105 Value 125 100 140 90° 0° 0° 135 100 115 This is a situation were the reader sits on the ceiling 8 meters above a door. The reader position is 0, 2. The labels is at a height of 1 meter and is looking straight up. The difference with example 6 is that the reader is rotated 90 degrees to make use of the smaller beam width 105 95 95 120 95 110 130 120 135 125 115 110 105 125 100 130 135 Rpow © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 37-41 Version: 1.0, September 19, 2002 4.6.9 4 – APPLICATION INFORMATION Example 8. Received power : -105 dBm minimum 10 105 Parameter 100 Value 110 R-height D-angle 115 A-angle 95 105 L-height L-angle 100 120 110 15° 30° 1.25 60° 90 115 125 95 105 90 100 95 110 100 120 130 115 115 110 105 135 135 140 130 125 115 145 110 120 170 150 135 125 135 120 130 135 This example is typical for the situation where a label is behind the windshield of a car and the reader is placed along the road. The reader is rotated 30° towards the road in the horizontal plane. 120 140 140 145 150 10 Rpow © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 38-41 Version: 1.0, September 19, 2002 4.7 4 – APPLICATION INFORMATION Typical configurations. 120 Vac or 24 Vdc 120 Vac or 24 Vdc Communication to Host Communication to Host Card Transponder Inductive antenna Internal relay controls gate Internal relay controls gate Transponder STAND ALONE GATE MASTER • Use of short authorization table possible. • Use of short authorization table possible. • Profi-Bus or InterBus S network connection optional. • Reflex 130 as inductive antenna • GATE MASTER firmware needed! 120 Vac or 24 Vdc 120 Vac or 24 Vdc Transponder Inductive Nedap reader. (Accessor III) Communication to Host WIN-GATE Transponder Internal relay controls gate TRANSIT Extended Internal relay controls gate Communication to Host WinXS TRANSIT • Max. 1000 tag’s in authorization table. • Max. 100.000 tag’s in authorization table. • Slave in multi drop loop. (32 slaves max) • TRANSIT connected to antenna input. • Loop control by means of WIN-GATE. • Connection to any inductive reader possible. © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Page 39-41 Version :- 1.0 September 19, 2002 Appendix A Appendix A – Technical specification Technical specification Item Housing Dimensions Weight Protection class Temperature operational Temperature storage Specification Remarks Stainless steel 310 x 107 x 245 < 5 kg IP 65 -30°C .. +55°C Relative humidity -40°C .. +85°C 10 .. 93% non-condensing. Identification range Object speed Typical 10 meters 200 km/h Power supply 120 Vac +/- 10%, 200 mA, 50/60 Hz DC supply shall be capable of delivering a 1 A inrush current. 24 Vdc +/- 10 %, 500 mA 30 VA (TRANSIT Extended) Power consumption Tag in line of sight. Identification trajectory > 5 meter, 64 bit tag only. 18 VA (TRANSIT) Frequency range Number of channels Channel spacing Polarization EIRP Receiver sensitivity Antenna gain 2438.4 MHz .. 2457.0 MHz 32 600 kHz Circular (LHC) Max 18.7 dBm linear -100 dBm > 8 dBi EMC Safety In accordance with the 89/336/EEC European directive EN 50081-1, EN 50082-1 EN 50082-2, ETS 0908 EN 60950 Complies to the following regulations FCC Part 15.245 ETS 300 440 © NEDAP IDEAS – AVI P.O. Box 103, NL-7140 AC GROENLO Selected by DIP-switch, sealed in factory. To be used when systems are close together. Valid for RX-array and TX-array Page 40-41 Version : 1.0 September 19, 2002 Appendix B ITEM Appendix B – Nedap part numbers. Nedap part numbers. Part number 9874801 Description Microwave identification system in stainless steel housing. • TRANSIT • TRANSIT Extended 9873694 Microwave identification system in stainless steel housing intended for access control. • Booster XScard 9848827 • Booster ISOcard 9848819 • Window tag R/O. 9862897 Tag which can be placed behind the windshield of a vehicle and in which a thick inductive card can be placed. Activation after pressing the card. Tag which can be placed behind the windshield of a vehicle and in which a thin inductive card can be placed. Activation after pressing the card. Tag which can be placed behind the windshield of a vehicle. This tag is always active. Number is factory programmed. • Window tag R/W. 9866078 • Switched Window tag R/O 9866094 • Switched Window tag R/W 9866086 Tag which can be placed behind the windshield of a vehicle. This tag is only active for a short time after activation by the driver. This tag can also be read and programmed inductively. • Heavy duty tag R/O 9875689 • Heavy duty tag R/W 6 9849289 This tag is a heavy-duty tag that can be mounted at the outside of many vehicles and is capable of exposure to harsh environmental conditions. This tag has an EX approval (Eex ia IIC T4) Number is factory programmed. Programmable with 6 decimal number by customer. 64 bit frame length including customer code. • Heavy duty tag R/W 80 9875697 Programmable with 20 hexadecimal numbers by customer. 128bit frame length NO customer code. • Combi Booster ISO 9884025 • Combi Booster LCC 9894017 This tag combines the functionality of a Window Tag and a Booster. Vehicle-ID is fixed programmed into the CombiBooster. There are a number of operational modes. See CombiBooster manual. As Combi Booster ISO but can hold the thicker XS-cards. • Pocket-tag R/O 9882170 Credit Card sized microwave and inductive readable tag intended for identifying people. Uses simple multi tag protocol. • Pocket-tag R/W 6 9881670 • RS 232 III 7806434 Credit Card sized microwave and inductive readable tag intended for identifying people. Uses simple multi tag protocol. Programmable with 6 decimal number by customer. 64 bit frame length including customer code. Optional communication board. • CM422 7811730 Optional communication board. (RS422) • Current loop II 7803940 Optional communication board. • Profi-Bus DP 7817134 Optional communication board for Profi-Bus networks. • InterBus 7817169 Optional communication board for InterBus networks. © NEDAP IDEAS - AVI Tag which can be placed behind the windshield of a vehicle. This tag is always active. This tag can also be read and programmed inductively. Tag which can be placed behind the windshield of a vehicle. This tag is only active for a short time after activation by the driver. Number is factory programmed. 41-41 ® P61 firmware for TRANS-IT (PS-270) Installation Guide 28 June 2002 Part.no. 5268397 This information is furnished for guidance, and with no guarantee as to its accuracy or completeness; its publication conveys no licence under any patent or other right, nor does the publisher assume liability for any consequence of its use; specifications and availability of goods mentioned in it are subject to change without notice; it is not to be reproduced in any way, in whole or in part, without the written consent of the publisher. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 1 of 18 P61 firmware CONTENTS INTRODUCTION.......................................................................................................................... 3 DIP SWITCH SETTINGS.............................................................................................................. 4 LED INDICATORS....................................................................................................................... 4 APPLICATION INFORMATION...................................................................................................... 5 4.1 DC2/DC4 PROTOCOL........................................................................................................ 5 4.1.1 EVENT MESSAGES............................................................................................... 5 4.1.2 COMMAND MESSAGES......................................................................................... 7 FIRMWARE UPGRADING.......................................................................................................... 12 FIRMWARE REVISION HISTORY............................................................................................... 12 HARDWARE ............................................................................................................................. 13 ASCII TABLE............................................................................................................................ 14 DC2/DC4 PROTOCOL ............................................................................................................... 15 C.1 DATA FORMAT................................................................................................................ 15 C.2 PROTOCOL DESCRIPTION.............................................................................................. 15 C.3 SPECIAL CHARACTERS ................................................................................................. 15 C.4 DATA MESSAGE............................................................................................................. 16 C.5 CHECKSUM CALCULATION............................................................................................. 16 C.6 FLOWCHART.................................................................................................................. 17 DECIMAL TO ASCII CONVERSION TABLE................................................................................. 18 © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 2 of 18 P61 firmware INTRODUCTION The P61 firmware is the standard TRANS-IT® (PS-270) firmware. The TRANS-IT® is based on proven microwave technology in the 2.45 GHz ISM band and allows identification of tags at a distance up to 10 meters, even at high speeding passage. The P61 firmware combines microwave identification with inductive identification at 120 kHz. The P61 firmware supports a wide range of transponders for various applications. The heavy duty tag is developed typical for vehicle applications. The window-tags can be mounted easily behind the windshield of a vehicle. The booster-unit is a special window tag, which is able to hold a NEDAP inductive identification card. This card is read by the booster. The combi-booster combines the features of the window-tag with a booster allowing to identify both vehicle and driver. The P61 firmware supports the DC2/DC4 asynchronous communication protocol. This ASCII based communication protocol supports software handshaking and error checking. Identified transponders are automatically reported to any connected host computer in an event message, therefore no polling is required. Below the main features of the P61 firmware are summarised: • Supports DC2/DC4 communication protocol • Identifies microwave 2.45GHz transponders and (if enabled) inductive 120kHz transponders. • Decodes NEDAP PM-transponders, NEDAP Combi-Boosters and EM Marin 400x transponders. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 3 of 18 P61 firmware DIP SWITCH SETTINGS The TRANS-IT® (PS-270) has 8 DIP-switches, which are used by the P61 firmware as described in the table below. Refer to appendix A when locating the DIP-switches. VALUE ON OFF Framelength 128 bit Framelength 64 bit ON OFF Manchester decoding disabled Manchester decoding enabled ON OFF Baudrate 9600 Baudrate 1200 Baudrate 19200 Baudrate 38400 ON ON OFF OFF ON OFF ON OFF Data format 7/even/1 Data format 8/none/1 ON OFF Use default antenna Microwave and inductive antenna Table 1: DIP-switch settings Note1: Note2: Note3: Set DIP-switch 8 only to OFF when using a TRANS-IT® reader with an inductive (120kHz) antenna connected. The P61 firmware then tries to identify transponders on both antennas (microwave and inductive). When on one antenna a valid transponder is identified it sticks to that antenna source and does not identify anymore on the other antenna. So, when a vehicle is identified with the microwave antenna and this vehicle stays in front of the TRANS-IT®, nobody is identified at the inductive antenna. When identifying vehicles at high speed it is recommended to keep DIP-switch 8 in ON position. Set DIP-switch 7 to OFF when no combi-booster or EF-coded transponders are to be identified. This increases the detection speed. DIP-switch 7 is only read during a startup. Set DIP-switch 6 to OFF when manchester encoded transponders (e.g. EM Marin 400x) are to be identified. LED INDICATORS A number of LED's are used by the P61 firmware to indicate the current status. The table below describes the function of each LED. Refer to appendix A when locating the LED's. LED Description STS Status LED. Indicates that the power is on and the processor is running. The LED continuously blinks like the system's heartbeat. Identification LED. This green LED starts to blink fast when a valid transponder is identified. The LED stays off when no (valid) transponder is identified. Unlock LED. The unlock LED is normally off and goes on when a valid transponder is identified. The LED is turned off when no transponder is identified anymore and the relay-hold-time has elapsed. This LED can be connected to a Reflex or DC130 antenna. There is also a relay contact present which has the same function. Lock LED. Red LED indicating system standby. This LED is normally on and goes off when the unlock LED goes on. This LED can be connected to a Reflex of DC130 antenna. Input status LED This red LED is on when the input contact is closed. The input is not used in the P61 firmware. ID UL NA INP / DOOR Table 2: LED indicators © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 4 of 18 P61 firmware APPLICATION INFORMATION The main function of the reader is to detect NEDAP transponders and to transmit its identification number to a host computer. The id-number will be sent to the host in a so-called event message. A detailed description of each event message is given in chapter 4.1.1. Command messages allow a host computer to change settings in the reader or to request information from the reader. The command messages are described in chapter 4.1.2. 4.1 DC2/DC4 PROTOCOL DC2/DC4 protocol is the standard Nedap protocol which supports two-way communications, error checking and software handshaking. This chapter describes the application layer of the DC2/DC4 protocol as it is implemented in the P61 firmware. Refer to appendix C for a description of the DC2/DC4 protocol details. 4.1.1 EVENT MESSAGES Event messages are messages that report to the host computer that a specific event has occurred inside the reader. There are different types of event messages that may be send by the reader, like the detection event that is sent when a transponder is identified. Event messages, when they occur, are stored locally in the reader in the event buffer. Once communication is idle the reader will try to transmit the event message. A maximum of 3 event messages can be stored. When the event buffer is full a new event will overwrite the oldest one. The event buffer is located in RAM memory and its contents will be lost when the power is off. The reader may send the following event messages. Protocol dependant characters are not shown here. Spaces are added for clarity. Spaces are only added for readability. O-event: Reader restarted Description: The reader sends this event message as soon as the reader is powered-up to indicate that the system is active. Application settings stored in EEPROM were not lost. Syntax: 01 01 01 20 O [????????] Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. Notes: In case the P-event is sent the O-event is omitted. P-event: Reader reset Description: The reader sends this event message as soon as the reader is powered-up to indicate that the system is active. Application settings stored in EEPROM were reset to their factory default. EEPROM settings are not lost when the reader is switched off. The EEPROM settings may be lost when the firmware is changed. Syntax: 01 01 01 20 P [????????] Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. Notes: In case the P-event is sent the O-event is omitted. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 5 of 18 P61 firmware N-event: Transponder identified (6-digit CF/DF/GF-code) Description: When a transponder is identified this event message reports its identification number. This event is only sent when a 6-digit transponder is identified. See also the timing diagram in Figure 1. Syntax: 01 01 01 20 N [????????] nnnnnn Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. nnnnnn Identification number in range from 1 to 999999. Detection Event message Figure 1: Timing diagram detection event N-event: End of detection (6-digit CF/DF/GF-code) Description: This event message is transmitted when a previously identified transponder is no longer present. The event is not send until the holdtime has expired. Syntax: 01 01 01 20 N [????????] 000000 Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. Notes: Not every detection event has to be followed by a end-of-detection event. See the timing diagram in Figure 2. Detection ID-1 ID-2 Holdtime Event message ID-1 ID-2 End-of-detection Figure 2: Timing diagram end-of-detection event U-event: Combi-booster identified Description: When a combi-booster is identified this event message reports both identification numbers. The first identification number is from the combi-booster, the second number is from the card which may be placed in the combi-booster. Syntax: 01 01 01 20 U [????????] 0000aaaaaa bbbbbbbbbb Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. aaaaaa Combi-booster identification number in range from 1 to 999999. bbbbbbbbbb Card identification number. Can be hexadecimal if a EM-Marin 400x transponder card is used. Notes: When no card is placed in the combi-booster the second identification number is left blank (filled with zeros). U-event: Transponder identified (80-bit EF-code) Description: When a transponder is identified this event message reports its identification number. This event is only sent when an 80-bit transponder is identified. Syntax: 01 01 01 20 U [????????] xxxxxxxxxxxxxxxxxxxx Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. xxx...xxx Identification number 80 bit hexadecimal. Hexadecimal character made out of 4 bits (nibble) added with the value of character '0'. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 6 of 18 P61 firmware U-event: EM-Marin 400x transponder identified Description: When a EM-Marin 400x transponder is identified this event message reports its identification number. Syntax: 01 01 01 20 U [????????] 0000000000 xxxxxxxxxx Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. Notes: The EM-Marin 400x transponder may be identified by the inductive antenna (if enabled by DIP-switch 8) or by the microwave antenna when placed in a booster. U-event: End of detection Description: This event message is transmitted when a previously identified transponder is no longer present. The event is not send until the holdtime has expired. Syntax: 01 01 01 20 U [????????] 00000000000000000000 Where: [????????] Optional unused timestamp. Can be enabled with command message 0265. Notes: Not every detection event has to be followed by a end-of-detection event. See the timing diagram in Figure 2. 4.1.2 COMMAND MESSAGES The following command messages may be sent to the reader. Protocol dependent characters are not shown here. 20 Check communication Description: Command message can be used to check the communication with the TRANS-IT. The TRANS-IT will always respond with an ACK. Syntax: 01010120 Reply: 0243 Request reader status Description: Request the current status of the reader. The reply message contains the transponder identification number. Syntax: 0101010243 Reply: 0101010243nnnnnn or 0101010243xxxxxxxxxxxxxxxxxxxx Where: nnnnnn Identification number 6-digit in range from 0 to 999999. xxx...xxx Identification number 80 bit hexadecimal. Example1: Window-tag number 12345 reply = 0101010243012345 Example2: Combi-booster number 666666 with no inductive card reply = 010101024300006666660000000000 Example3: Combi-booster number 666666 with Em-Marin card 0100F246A8 reply = 010101024300006666660100?246:8 Example4: Booster with Em-Marin card 0100F246A8 reply = 010101024300000000000100?246:8 0293 Request firmware version Syntax: 0101010293 Reply: 0101010293pppvvv Where: ppp Firmware name (P61). vvv Firmware Version (100 = version 1.00). © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 7 of 18 P61 firmware 0250 Clear event buffer Description: Erase all events from the event buffer. Events are automatically erased from the event buffer when they are transmitted to the host computer. But it may be useful to clear the event buffer when the host computer has been offline for a while to remove 'old' events. Syntax: 0101010250 Reply: 0263 Restart reader Description: Restart the reader. This is the same as turning the power-off and back on again, and will therefore be followed by an O-event (reader restart). All EEPROM settings are unaffected by this command. Syntax: 01010163[W] or: 0101010263[W] Reply: Where: [W] Optional unused parameter to accept message compatible with other NEDAP readers. Notes: See command message 02<>. 02<> Reset reader Description: Syntax: Reply: Where: Notes: Restart the reader and reset all EEPROM settings to their factory defaults. The reader will generate a P-event (reader reset). 01010102<>[W] Optional unused parameter to accept messages compatible with other NEDAP readers. See command message 0263. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 8 of 18 P61 firmware 0255 Request timers Description: Request timer values. Changed timer values are stored in EEPROM and are only lost when a 'reset reader' command is performed. The relay hold time (also referred to as the unlock-time) is default 1 second. It causes the unlock relay to stay activated for the specified time after the transponder could not be identified anymore. See timing diagram in Figure 3. When during the relay hold time the same transponder is identified again the reader will not generate a new detection event. The repeat time is default 0 seconds, which means that the detection event is only sent once. The repeat time causes the reader to transmit an detection event every 'repeat time' seconds for as long as the transponder is present. See timing diagram in Figure 4. Syntax: 0101010255 Reply: 0101010255AABBCCDD Where: AA Relay hold time in the range from 1 to 255 tenths of seconds. Use decimal to ASCII conversion table. BB Unused parameter (reserved for alarm time). CC Unused parameter (reserved for blocking time). DD Repeat time in the range from 0 to 255 tenths of seconds. Use decimal to ASCII conversion table. Detection Detection Holdtime Holdtime Relay Event message Figure 3: Timing diagram relay-hold-time 0256 Set timers Syntax: or: Reply: Where: Notes: T-Repeat T-Repeat Figure 4: Timing diagram repeat time 0101010256TTT 0101010256AA[BB[CC[DD]]] TTT Relay hold time in the range from 001 to 025 seconds. AA Relay hold time in the range from 1 to 255 tenths of seconds. Use decimal to ASCII conversion table. BB Unused parameter (reserved for alarm time). CC Unused parameter (reserved for blocking time). DD Repeat time in the range from 0 to 255 tenths of seconds. Use decimal to ASCII conversion table. See command message 0255. When only the relay hold time has to be changed, the other timer values do not have to be specified. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 9 of 18 P61 firmware 0265 Set 'time in event message' mode Description: Enables or disables the optional dummy timestamp characters in event messages. This setting is stored in EEPROM and is only lost when a 'reset reader' command is performed. Syntax: 0101010265m Reply: Where: 0 = disabled (default). Dummy timestamp characters in event messages will not be transmitted. 1 = enabled. Dummy timestamp characters in event messages are transmitted. 0266 Request 'time in event message' mode Syntax: 0101010266 Reply: 0101010266m Where: 0 = disabled (default). 1 = enabled. Notes: See command message 0265. 0267 Set 'end-of-detection' mode Description: The end-of-detection event is a detection event with identification number 0. This event is only send when the relay-hold time has expired. See timing diagram in Figure 2. This setting is stored in EEPROM and is only lost when a 'reset reader' command is performed. Syntax: 0101010267m Reply: Where: 0 = end-of-detection event message disabled (default). 1 = end-of-detection event message enabled. Notes: See command message 0255. 0268 Request 'end-of-detection' mode Syntax: 0101010268 Reply: 0101010268m Where: 0 = end-of-detection event message disabled (default). 1 = end-of-detection event message enabled. Notes: See command message 0267. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 10 of 18 P61 firmware 0270 Set relay activation mode Description: Set relay activation mode to manual or automatic. In manual mode the relay is only controlled by the command messages 0272, 0274 and 0276. In automatic mode the relay is also activated when a transponder is identified. This setting is stored in EEPROM and is only lost when a 'reset reader' command is performed. Changing the relay activation mode updates the relay output status if necessary. Syntax: 0101010270m Reply: Where: 0 = automatic (default). Relay will be activated and de-activated when transponders are identified. 1 = manual. Relay is only activated and de-activated with command messages 0272, 0274 and 0276. 0271 Request relay activation mode Syntax: 0101010271 Reply: 0101010271m Where: 0 = automatic (default). Relay will be activated and de-activated when transponders are identified. 1 = manual. Relay is only activated and de-activated with command messages 0272, 0274 and 0276. Notes: See command message 0270. 0272 Activate relay Description: Syntax: Reply: Activate unlock relay. The relay will not be de-activated until command message 0274 is received. When relay activation mode is automatic (default setting) the relay is activated when either this command is sent or a transponder is identified. When this command is sent the relay stays activated, also when there is no more detection. See also command 0270 to change the relay activation mode. 0101010272 0274 Deactivate relay Description: De-activate unlock relay. When relay activation mode is automatic the relay may be activated if a transponder is identified. If this is the case, this command will not deactivate the relay until end of detection. See also command 0270 to change the relay activation mode. Syntax: 0101010274 Reply: 0276 Activate relay single shot Description: Activate the unlock relay for a period of relay hold time and automatically deactivate afterwards. Syntax: 0101010274 Reply: © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 11 of 18 P61 firmware FIRMWARE UPGRADING The Microchip PIC16F876 is a single chip flash based microcontroller, which allows to upgrade the firmware by the asynchronous serial interface. The upgrading is performed by a freeware application called "PIC downloader" which downloads the firmware file (*.hex) to the microcontroller. The upgrade procedure is described below. Note that the bootloader communicates always at 9600 baud, independent from the baudrate selected with the DIP-switches. 1. Select the firmware file (*.hex) by clicking the Browse … button. 2. Select the communications port to which the TRANS-IT® is connected. 3. Click the Download button to start downloading the firmware file. 4. The PIC downloader searches for the bootloader. 5. If the TRANS-IT® is properly connected and PIC downloader is setup correctly the firmware is downloaded. The window should look like shown in Figure 5. 6. Once the downloading has completed the PIC downloader displays the message 'Download successfully completed' and the TRANS-IT® starts the upgraded firmware. Figure 5: PIC downloader in progress Note1: Note2: If the message 'Searching for bootloader' does not disappear check the cables and the com-port settings. Sometimes it may be required to reset the TRANS-IT® before the bootloader can be found. Aborted downloads may cause the TRANS-IT® to stop functioning. In such cases repeat the upgrade procedure until it succeeds. FIRMWARE REVISION HISTORY Below the P61 firmware modifications are listed. For information on how to obtain the latest release of the P61 firmware contact Nedap. Version Date v3.00 Notes/Bugs fixed • First release Table 3: Revision history © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 12 of 18 P61 firmware HARDWARE The P61 firmware is developed for the TRANS-IT® (PS-270) microwave reader. Below an overview of the hardware components is shown. For more details about the connections and electrical specifications refer to the TRANS-IT® (PS-270) installation guide. Figure 6: Overview PS-270 board © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 13 of 18 P61 firmware ASCII TABLE Dec Hex Char Dec Hex Char Dec Hex Char Dec Hex Char 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F SP 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 78 78 79 7A 7B 7C 7D 7E 7F DEL © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 14 of 18 P61 firmware DC2/DC4 PROTOCOL DC2/DC4 protocol is the standard Nedap protocol which supports two-way communications, error checking and software handshaking. C.1 DATA FORMAT Baudrate: Databits: Parity: Stopbits: C.2 9600(default), 1200, 19200 or 39400. Setup with DIP-switches (see chapter 2). 7(default) or 8. Setup with DIP-switches (see chapter 2). even(default) or none. Setup with DIP-switches (see chapter 2). PROTOCOL DESCRIPTION The DC2/DC4 protocol is a serial, asynchronous protocol for ASCII communication. The communications is started by sending a DC2 character and waiting for a DC4 character response. The DC4 character is the signal that the receiver is ready to accept a message. When there is no DC4 response within 2 seconds the communication is aborted. If the DC4 character is received the transmitter will send the data message and waits for an ACK or NAK character response. The ACK character is the confirmation that the message was correctly received. The NAK character is the signal that the receiver has detected an error in the data message. When there is no ACK response within 4 seconds the communication is aborted. Both reader and host can startup the communication by sending a DC2. When the reader and the host startup the communication at the same time, the host will have the precedence to transmit it's message. The reader will (temporarily) withdraw. In other words the reader (and not the host) transmits a DC4 character. Transmit DC2 data message < 2 sec Receive < 4 sec DC4 ACK Figure 7: Timing diagram DC2/DC4 protocol When an event message (initiated by Nedap) is not acknowledged the event is NOT be cleared from the event buffer. Nedap resends the event message later. When a reply message is not acknowledged the reply is lost. The host has to resent the request in order to get the reply again. C.3 SPECIAL CHARACTERS The DC2/DC4 protocol supports 7 bit ASCII data communication. See also appendix B ASCII table. The ASCII control characters are reserved for message handling. The remaining characters (in the range from 20 hex to 7F hex) are valid characters for the data. The used special characters are: DC2 12 hex Are you ready to receive? DC4 14 hex I'm ready to receive! STX 02 hex Here comes the message. ETX 03 hex This was the message. ACK 06 hex I understood the message. NAK 15 hex I didn't understand the message. © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 15 of 18 P61 firmware C.4 DATA MESSAGE The data message is built up as follows: STXFF [ff] [data] ETX Where: C.5 STX FF [ff] [data] ETX STX character. Address. For P61 firmware always '010101'. Two character command number. See chapter 4.1.2. Optional two character sub command number. See chapter 4.1.2. Optional data. Two bytes checksum. ETX character. CHECKSUM CALCULATION The checksum is calculated following the procedure below: 1. Sum all character values in the message. STX, ETX and the checksum itself not included. 2. This sum must be shortened into 1 byte. 3. Split this byte up into two bytes. 4. Finally add the value of character '0' to both bytes to make sure the checksum does not contain control characters. Example: message = '0101010293' ASCII characters are enclosed within quotes, all other values are in hexadecimal notation: 1. Sum all character values: 4 x '0' + 3 x '1' + '2' + '9' + '3' = 4 x 30 + 3 x 31 + 32 + 39 + 33 = 1F1. 2. Shorten sum into 1 byte: F1. 3. Split byte into 2 bytes: 0F and 01. 4. Add '0' to both bytes: 0F + '0' = 0F + 30 = 3F = '?' and 01 + '0' = 01 + 30 = 31 = '1'. Complete message = STX'0101010293?1'ETX © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO Page 16 of 18 P61 firmware C.6 FLOWCHART BEGIN Send Msg DC2 ß NO YES NO YES DC4 à CommTries = 0 Timeout=0 DC2 à STX ß Timeout=0 NO YES Timeout 4 sec. NO YES Timeout=0 DC4 ß NO Timeout 2 sec. NO Receive and store byte ß YES YES CommTries++ ETX ß STX ETX à NO YES Timeout 2 sec. NO YES Calculate checksum Timeout=0 ACK ß NO NAK ß NO Timeout 4 sec. NO Checksum OK ? NO YES YES YES YES Handle message CommTries >3 NO Message succesfull NO YES YES ACK à Goto BEGIN © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO NAK à à ß Transmit Receive Page 17 of 18 P61 firmware D DECIMAL TO ASCII CONVERSION TABLE dec ascii 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 dec ascii 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 dec ascii 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 dec ascii 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 © Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO dec ascii 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 dec ascii 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 dec ascii 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 dec ascii 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 Page 18 of 18
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