Rockwell Automation 61C613 16 Channel Analog Input Module - Manual (Page 29)

5Ć1
5.0 DIAGNOSTICS AND
TROUBLESHOOTING
This section explains how to troubleshoot the module and field
connections.
5.1 Incorrect Data
Problem: The data is either always off, always on, or different than
expected. When this happens the module is in the wrong slot or
malfunctioning, or there is a programming error. It is also possible
that the input is either not wired or wired to the wrong device. Use the
following procedure to isolate the problem:
Step 1
Verify that the input module is in the correct slot.
See section 4.4.1
Step 2 Verify that rocker switches have been set correctly.
Refer to table 3.1 for the AutoMate 30/40 or table 3.2 for
DCS 5000/AutoMax for the correct settings of the address
switches.
Step 3 Verify that the application software is written correctly.
Verify that your application program is referencing the
proper module. Refer to the address that corresponds to
the switch settings in table 3.1 or 3.2. Confirm that each
channel has been configured correctly.
Step 4 Verify that the module can be accessed.
Repeat step 7 in section 3.1. If the module now works you
have a programming problem. Review the examples that
have been provided. If the module does not work, there is
a hardware problem. Proceed to step 5.
Step 5 Verify that the input is wired to the correct device.
Confirm that all connections at the terminal strip are tight.
Refer to Appendix C for a definition of terminal strip
connections. Make certain that each input channel is wired
to the correct field device.
Make certain that the 50Ćpin flat cables are secure and
connected to the proper connectors on the module.
Connect a voltmeter to the proper points on the terminal
strip and confirm that the external device is generating the
correct voltage or current.
If you are using a 61C615 termination panel, measure the
external power supply to verify that it is producing +15
volts.
Step 6 Verify that the hardware is working correctly.
One at a time, swap out the input module, the termination
panel, the processor (s), and finally the backplane. After
each swap, if the problem has not been corrected, replace
the original item before swapping out the next item.