Table Of Contents - Honeywell UDC2300 Product Manual

SECTION 1 - OVERVIEW.................................................................................................. 1
1.1 Introduction................................................................................................... 1
1.2 Message Exchange Protocols ...................................................................... 2
1.3 Field Upgrade............................................................................................... 3
SECTION 2 - INSTALLATION........................................................................................... 5
2.1 Introduction................................................................................................... 5
2.2 RS232 to RS485 Converters........................................................................ 6
2.3 Using a Black Box Converter........................................................................ 7
2.4 Using a Westermo Converter ....................................................................... 9
2.5 Wiring Diagrams......................................................................................... 11
SECTION 3 - ESTABLISHING COMMUNICATIONS AND TESTING ............................ 13
3.1 Preparing the Controller for Communications ............................................ 13
3.2 Programming Your Computer .................................................................... 18
3.3 Message Exchange .................................................................................... 19
3.4 Request Messages..................................................................................... 20
3.5 Response Messages .................................................................................. 23
3.6 Status Codes.............................................................................................. 25
3.7 Checksum Protocol (for Data Security) ...................................................... 27
3.8 Shed ........................................................................................................... 33
3.9 Loopback.................................................................................................... 34
3.10 Recovering from Communications Failures................................................ 36
SECTION 4 - READ AND WRITE OPERATIONS........................................................... 39
4.1 Read Operations ........................................................................................ 39
4.2 Read Analog Parameters ........................................................................... 40
4.3 Read Digital Parameters ............................................................................ 43
4.4 Write Operations ........................................................................................ 45
4.5 Write Analog Parameters ........................................................................... 46
4.6 Write Digital Parameters ............................................................................ 50
SECTION 5 - READ, WRITE AND OVERRIDE PARAMETERS ON UDC2300
PROCESS CONTROLLERS ..................................................................... 53
5.1 Overview .................................................................................................... 53
5.2 Reading Control Data - UDC2300 ............................................................. 55
5.3 Read Options Status - UDC2300 .............................................................. 56
5.4 Miscellaneous Read Only's - UDC2300 .................................................... 57
5.5 Setpoints - UDC2300................................................................................. 59
5.6 Using a Computer Setpoint (Overriding Controller Setpoint) - UDC2300.. 60
5.7 PV or Setpoint Override Selections - UDC2300 ........................................ 62
5.8 Reading or Changing the Output - UDC2300............................................ 63
5.9 Local Setpoint/PID Selection/Setpoint Ramp Status - UDC2300 .............. 64
5.10 Configuration Parameters - UDC2300....................................................... 67
10/00 RS422/485 ASCII Communications Option Product Manual
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