Despatch Protocol Plus Modbus Communications User Manual
Page 40
Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03
34
Data hi
$00
Data hi
$00
Data lo
$00
Data lo
$03
CRC
$----
CRC
$----
5.3.2
[17] Report Slave ID
Requests the slave to return its ID code. The ID code identifies the product line of which the slave is a
member. The Slave ID for Protocol
TM
Plus is 1. Besides the ID code, the slave‘s software version
number is also returned as an ASCII string. The version number will be sent in the format ―VXX.X‖.
Query
Example: Report Slave ID from slave address 15 whose software version is 5.0.
Field Name
Data
Slave address
$0F
Function
$11
CRC
$----
Response
The normal response is to echo the slave address and function code, supply a data byte count, return the
slave ID code, and return the software version number string.
Example: Response.
Field Name
Data
Comment
Slave address
$0F
Function
$11
Byte Count
$06
Slave ID
$01
Protocol
TM
Plus ID code
Version number hi byte
$56
‗V‘
$30
‗0‘
.
$35
‗5‘
.
$2E
‗.‘
Version number lo byte
$30
‗0‘
CRC
$----