Omron CQM1 User Manual

129
Appendix B
Troubleshooting
Analog Output Unit
Kind of error Phenomenon Cause Remedy
Indicator The RDY indicator is not lit. 1. The Unit is not connected
properly.
2. No end cover is attached.
Refer to the CQM1H Operation
Manual (W363) or the CQM1
Operation Manual (W226) and
reset the Analog Output Unit.
Output The output voltage or current
does not change when output
data changes.
The power supply cable is not
connected to the Analog Power
Supply Unit.
Connect the power supply cable.
The output voltage or current
does not match the output char-
acteristics.
An external device with an
impedance not within the per-
missible range is connected.
Check if the impedance of the
external device is within the per-
missible range.
I/O Unit over The CPU has an I/O Unit over
error.
The total number of words used
by the Units connected exceeds
the maximum available words of
the CPU.
Each Analog Output Unit uses
two words. Check if the total
number of words is exceeding
the maximum available words of
the CPU.

Omron CQM1 Specifications

General

Model	CQM1
I/O Capacity	Up to 256 I/O points
Programming Language	Ladder Logic
Timer/Counter	128 timers/counters
Operating Temperature	0 to 55°C
Humidity	10 to 90% RH (non-condensing)
Power Supply	24 VDC or 100-240 VAC
Communication Ports	RS-232C
Memory Capacity	3.2K words
Instruction Set	Basic and advanced instructions
Memory	RAM (battery-backed)
Program Memory	3.2K words
Storage Temperature	-20 to 75°C