Read Configuration Examples - Honeywell UDC3200 Product Manual

Modbus RTU Function Codes

9.3.1 Read Configuration Examples

Example #1
The following is an example of a request to read the Gain 1 value using Function code
20.
Request Message (Read (Gain 1) = ID Tag 001)
02 14 07 06 00 03 00 01 00 02 (CRC16)
Where:
02
14
07
06
00,03
00,01
00 02
(CRC16)
This is the response to the above request.
Response Message
Where:
02
14
06
05
06
3F C0 00 00 = 1.50 (Value of Proportional Band)
(CRC16)
180
= Address
= Function Code 20 (14 hex)
= Byte Count
= Reference Type
= File Number (Access Data Value)
= Register Address (Standard Access Gain 1 - Tag ID #1)
= Register Count (Floating Point Data)
02 14 06 05 06 3F C0 00 00 (CRC16)
= Address
= Function Code 20 (14 Hex)
= Byte Count
= Sub Message Length
= Reference Type (IEEE Floating Point)
UDC3200 Universal Digital Controller Product Manual 12/04