CTI Products IOB I/O Interface - Manual (Page 33)

IOB Hardware Reference Troubleshooting
CTI Products, Inc.
68-11168-105
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8. Troubleshooting
This table is a list of troubleshooting tips specific to the IOB module. For
additional troubleshooting tips, refer to the troubleshooting section found in the
Monitoring and Control Network System Manual (reference 1).
Due to the high percentage of surface-mount components the IOB is treated as a
field replaceable unit. If any system problems are the result of a malfunctioning
IOB unit, the entire unit must be replaced and returned for repair.
PROBLEM CAUSE
ERR LED is ON Verify that the IOB’s Group and Module switches are set to valid
numbers.
The wrong status
messages are being
displayed for my custom
category Verify that the application circuits are connected to the proper IOB
pins and that the input value fields of your MCNRCD.CFG file match
your I/O bit assignments for the application circuits.
I have defined sub-
categories in my system,
but the status messages
being displayed are not
correct Verify that the sub-category selector pins are set to the proper state
(inactive pins should be left as no connect, and active pins should be
tied to ground).