Write Configuration Examples; Modbus Read, Write And Override Parameters Plus Exception Codes - Honeywell UDC2800 Product Manual

Restrictions on Parameter Numbers in One Message
The maximum number of writeable parameters per write request is 1.

Write Configuration Examples

Example #1
The following is an example of a request to write the Gain 1 value
using Function code 21 (15 Hex).
Request Message (Input 1 type 1= 6 "ID Tag 1")
02 15 09 06 00 03 08 99 00 01 00 06 (CRC16)
Where:
02 = Address
15 = Function Code 21 (15 Hex)
09 = Byte Count
06 = Reference Type (IEEE Floating Point)
00 03 = File Number (Access Data Value)
08 09 = Register Address (Standard Access - Input 1 type 1- ID Tag 1)
00 01 = Register Count (Integer)
00 06 = 6
(CRC16)
This is the response to the above request.
Response Message (The response is an echo of the request)
02 15 09 06 08 99 00 01 00 06 (CRC16)
Modbus Read, Write and Override Parameters
plus Exception Codes
What's in this section?
The following topics are covered in this section.
In this section:
Chapter 11 - Modbus RTU Function Codes
189