Rockwell Automation 1770-KF2 Data Highway or Highway Plus Interface Module User Manual - Manual (Page 88)

Message Packet Formats
Chapter 5
5-9
Basic Command Set
Basic commands include those that can generally be executed by any PC
station on the communication link, regardless of the type of PC controller
at that station. In some cases, switch settings on the station interface
module can disable execution of a particular type of command at that
station. For more details, refer to the user’s manual for the station
interface module.
Basic commands are in two categories:
Privileged:
Computer initiates. PCs execute.
•
Diagnostic Counters Reset
•
Diagnostic Loop
•
Diagnostic Read
•
Diagnostic Status
•
Set ENQs
•
Set NAKs
•
Set Timeout
•
Set Variables
Non-Privileged:
PC stations and computer can initiate;
only PCs can execute (unless the
computer is programmed for execution).
•
Protected Bit Write
•
Protected Write
•
Unprotected Bit Write
•
Unprotected Read
•
Unprotected Write
Diagnostic Counters Reset
This command resets to zero all the diagnostic timers and counters in the
station interface module. The diagnostic status command gives the
starting address for this block of counters and timers.
Command Format:
Reply Format:
TNS STS CMD
06
SRC DST FNC
07
TNS STS CMD
46
SRC DST