Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 49)

Appendix
B
BĆ1
Diagnostic Command Support
The KF3 will interpret and respond to the following diagnostic commands:
Table B.A
KF3 Diagnostic Commands
Description Command Byte Function Code (hex)
Diagnostic Loop 06 00
Diagnostic Read Counters 06 01
Diagnostic Status 06 03
Reset Diagnostic Counters 06 07
Read Link Parameters 06 09
Set Link Parameters 06 0A
You can use this command to check the integrity of the transmissions over
the communication link. The command message transmits up to 243 bytes
of data to a node interface module. The receiving module should reply to
this command by transmitting the same data back to the originating node.
Figure B.1
Diagnostic Loop Command Format
CMD
06
STS TNS FNC
00
DATA
1 byte 1 byte 2 bytes 1 byte 243 bytes max
Figure B.2
Diagnostic Loop Reply Format
CMD
46
STS TNS DATA
1 byte 1 byte 2 bytes 243 bytes max
Diagnostic Loop