MBS Protocol
PLX30 Series
User Manual
Ethernet and Serial Gateways
Page 148 of 200
ProSoft Technology, Inc.
September 19, 2012
Example and State Diagram
Here is an example of a request to remote device to Return Query Data. This
uses a sub-function code of zero (00 00 hex in the two-byte field). The data to be
returned is sent in the two-byte data field (A5 37 hex).
Request
Response
Field Name
(Hex)
Field Name
(Hex)
Function
08
Function
08
Sub-function Hi
00
Sub-function Hi
00
Sub-function Lo
00
Sub-function Lo
00
Data Hi
A5
Data Hi
A5
Data Lo
37
Data Lo
27
The data fields in responses to other kinds of queries could contain error counts
or other data requested by the sub-function code.
