Rockwell Automation 1771-KA2 Communication Adapter Module - Manual (Page 116)

Start–up and Troubleshooting
Chapter 9
9-14
Increasing the Group Size
Once paired testing has been completed, execution of each command has
been verified. At this point, the size of the tested group of stations is
increased and station interaction of this larger group can be monitored.
For this phase of testing, the same checks outlined in sections titled
“Testing the Sending Station” and “Testing the Receiving Station” can be
made, but without the need to test each individual command. At this time,
all station processors remain in the TEST mode.
In this procedure, gradually increase the size of the tested group until all
stations are communicating.
Operation
Once the interaction of all station interface modules has been checked, the
station processors can be put into operation, one at a time. You must
determine which controller you intent to put in the RUN mode initially,
and in what order other stations are to be added in the RUN mode.
Monitoring of station interaction can continue during these procedures.
By adding stations one at a time, you can exercise maximum control over
the application and monitor controller behavior.
Power-Up
Only the 2 stations being examined in the first phase of start-up should be
ON. Follow these steps in powering up each of these stations:
1. Turn the processor mode select switch to PROG position.
2. Turn power ON at the station processor and communication adapter
module. Observe power supply and processor indicators for proper
status.
3. While observing the indicators of the communication adapter
module, turn the mode select switch to TEST position.
Within a short time, the PROG indicator on the module should turn ON
briefly, then OFF. This indicates that the module has checked the
communication zone rungs of program. If this indicator remains on, an
error may have been detected in these rungs. Should this be the case,
check the ERROR CODE storage word, as described in step 4.
If this indicator does not turn on, the communication zone of program
may be incorrectly entered. Check this zone if necessary.
The indicator labeled PROC should be OFF. If this indicator is ON, check
for a processor fault indication or poor Data Highway/Processor cable
connection.
4. If the PROG indicator does not turn off after a few seconds, observe
the ERROR CODE storage word.