F Troubleshooting - Omron CQM1H series Operation Manual

Analog Input Unit
Kind of error
Indicator The RDY indicator is not lit.
The ERR indicator is lit.
The BROKEN WIRE indicator is
lit.
No. of words The Analog Input Unit can be
allocated to two words only or
allocated to four words.
Conversion data The conversion data of the
Analog Input Unit does not
change even if the input voltage
or current is changed.
The conversion data of the
Analog Input Unit changes
slowly when the input voltage or
current is changed.
I/O Unit over The CPU has an I/O Unit over
error.
Analog Power Supply Unit
Kind of error
LED The P/S (P/S1, P/S2) indicator
is not lit.
Appendix B
Troubleshooting
Phenomenon
1. The Unit is not connected
2. No end cover is attached.
The DIP switch is set to prohibit
the conversion of all inputs.
An input set to a range of 1 to 5
V or 4 to 20 mA is
disconnected.
Unused analog input is set to a
range of 1 to 5 V or 4 to 20 mA.
The DIP switch setting is
incorrect.
The power cable is not
connected to the Analog Power
Supply Unit.
The voltage or current input is
not within the range that has
been set.
The mean value processing
function is working.
The total number words used
by the Units connected exceed
the maximum available words
of the CPU.
Phenomenon
The power supply cable of the
Analog Input Unit is not
connected to the Analog Power
Supply Unit.
Power is not supplied to the
system.
Cause
properly.
Cause
Remedy
Refer to the CQM1H/CQM1
Operation Manual and reset the
Analog Input Unit.
Refer to 2-1 Nomenclature and
set the DIP switch properly.
Check the wiring, terminal
board, input voltage, and input
current.
Set the unused analog input to
any other range or set to
prohibit conversion.
The DIP switch setting can be
monitored with the 2 CH and 4
CH indicators. Check whether
the setting is proper. If not, set
the DIP switch properly.
Connect the power cable.
Check the input voltage or
current or the range that has
been set.
Set the mean value processing
switch properly.
Each Analog Input Unit uses
four or two words. Check if the
total number of words are
exceeding the maximum
available words of the CPU.
Remedy
Connect the power supply
cable to the Analog Power
Supply Unit. Turning on the
Analog Power Supply Unit will
not cause the P/S (P/S1, P/S2)
indicator to be lit if the power
supply cable of the Analog
Input Unit is not connected to
the Analog Power Supply Unit.
Supply power to the system.
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