Installation manual

Publication 1747-RM001G-EN-P - November 2008
13-96 SLC Communication Channels
If you click the Clear button while monitoring Channel Status online, it will
reset all the channel status diagnostic counters to zero.
Modbus Commands
The controller configured for Modbus RTU Master responds to the Modbus
command function codes listed in the following table:
Last Device Reporting Error Code 3 Word 12
Error Code 4 Counter Word 13
Error Code 5 Counter Word 14
Error Code 6 Counter Word 15
Error Code 7 Counter Word 16
Error Code 8 Counter Word 17
Non-Standard Response Counter Word 18
Last Device Reporting Error Code 4-8 or Non-Standard
Response
Word 19
Table 13.29 Supported Modbus Commands as a Modbus RTU Master
Command Function Code
(decimal)
Subfunction Code
(decimal)
Read Coil Status 1 -
Read Input Status 2 -
Read Holding Registers 3 -
Read Input Registers 4 -
Write Single Coil
(1)
(1)
Broadcast is supported for this command.
5-
Write Single Holding Register
(1)
6-
Write Multiple Coils
(1)
15 -
Write Multiple Holding Registers
(1)
16 -
Table 13.28 SLC 5/03 and Higher Channel 0 Modbus RTU Master Channel Status
PL Diagnostic Counters (Modbus Master RTU)
Status Field/Description Diagnostic File Location