B Troubleshooting - Omron CQM1 Operation Manual

Analog Output Unit
Kind of error
Indicator The RDY indicator is not lit.
Output The output voltage or current
does not change when output
data changes.
The output voltage or current
does not match the output char-
acteristics.
I/O Unit over The CPU has an I/O Unit over
error.
Appendix B
Troubleshooting
Phenomenon
1. The Unit is not connected
2. No end cover is attached.
The power supply cable is not
connected to the Analog Power
Supply Unit.
An external device with an
impedance not within the per-
missible range is connected.
The total number of words used
by the Units connected exceeds
the maximum available words of
the CPU.
Cause
properly.
Remedy
Refer to the CQM1H Operation
Manual (W363) or the CQM1
Operation Manual (W226) and
reset the Analog Output Unit.
Connect the power supply cable.
Check if the impedance of the
external device is within the per-
missible range.
Each Analog Output Unit uses
two words. Check if the total
number of words is exceeding
the maximum available words of
the CPU.
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