Manual

Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03 iv
6.7.1 The Byte Count Field ............................................................................................................................. 41
7 PROGRAMMING EXAMPLE AND GENERAL HINTS ............................................................................ 42
7.1 CODE EXAMPLE .......................................................................................................................................... 42
7.2 ADDITIONAL COMMUNICATIONS TROUBLESHOOTING HINTS...................................................................... 47
List of Figures and Tables
TABLE 1: MODBUS REFERENCES .................................................................................................................................... 1
TABLE 2: PROTOCOL
TM
PLUS REFERENCES .................................................................................................................... 1
FIGURE 1: RS232 WIRING ............................................................................................................................................. 2
FIGURE 2: RS422A WIRING (4 WIRE) ............................................................................................................................ 3
FIGURE 3: RS485 WIRING (2 WIRE) ............................................................................................................................... 3
FIGURE 4: CONTROLLER REAR VIEW WITH COMMUNICATION CARD (LEFT) .................................................................. 4
FIGURE 5: COMMUNICATION CARD (0113-10175) JUMPER SETTINGS ............................................................................ 5
TABLE 3: PROTOCOL
TM
PLUS DISCRETE INPUT ADDRESS MAP ...................................................................................... 6
TABLE 4: PROTOCOL
TM
PLUS DISCRETE OUTPUT ADDRESS MAP ................................................................................... 7
TABLE 5: PROTOCOL
TM
PLUS INPUT REGISTER ADDRESS MAP....................................................................................... 8
TABLE 6: PROTOCOL
TM
PLUS HOLDING REGISTER ADDRESS MAP ............................................................................... 10
TABLE 7: COMMUNICATION SECURITY LEVELS ........................................................................................................... 15
TABLE 8 PROTOCOL
TM
PLUS FUNCTION AND EXCEPTION CODE SET .......................................................................... 20
TABLE 9 PROTOCOL
TM
PLUS DIAGNOSTIC (FUNCTION CODE 08) SUB-FUNCTION SET ................................................ 20
TABLE 10 PROTOCOL
TM
PLUS EXCEPTION CODE SET ................................................................................................. 21
TABLE 11: PROTOCOL
TM
PLUS DIAGNOSTIC REGISTER BIT ASSIGNMENT .................................................................... 30
FIGURE 6 CRC FLOWCHART ....................................................................................................................................... 40