Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 119)

Start–up and Troubleshooting
Chapter 9
9-17
With the START bit energized, proceed to the monitoring checks of the
paragraph entitled “Monitoring DONE and REMOTE/LOCAL FAULT
Bits.” Once these checks have been completed, the next START/DONE
bit addresses can be entered in the test rung for testing of the next
command.
The FORCE ON function can be removed using the programming
terminal. On the industrial terminal, position the cursor on the FORCED
instruction and press the following keys:
[FORCE ON][REMOVE]
On the program panels, press the following keys to remove a FORCE
ON function:
[SELECT][FORCE ON][REMOVE]
The FORCE ON function is also removed when the programming
terminal is disconnected from the station.
Monitoring REMOTE/LOCAL FAULT Bits
This second step in command checking requires that the status indicator
of the programming terminals be monitored for FAULT bits. Use the
following steps to observe the instructions that examine the FAULT bits.
1. Turn the processor mode select switch to TEST position.
2. Use the SEARCH functions of the programming terminal to locate
instructions that examine FAULT bits. (SEARCH functions are
described in section titled “Programming Terminals.”)
3. Observe the ON/OFF status indicator of the programming terminal
for each DONE and FAULT bit corresponding to the command.
(These ON/OFF status indicators are described in section titled
“Programming Terminals.”) Either a DONE bit or FAULT bit will
turn on for each command.
If the REMOTE or LOCAL FAULT bit turns ON for the command sent,
some hardware-related fault or programming error can be suspected.
Check the connections and equipment indicated in Figure 9.3.
If the DONE bit turns on the command has been executed properly by the
sending station.
After checking a command in this manner, check the receiving station, as
described in section titled “Testing the Receiving Station.” Then, check
any other commands as necessary, using the applicable procedures of
sections titled “Power-up,” “Testing the Sending Station,” and “Testing
the Receiving Station.”