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No.EX##-OML0007
Fault
no.
When
Fault
Check
Action
Output type is not compatible
Check if output unit specification
(PNP or NPN) and connected load
specification are compatible.
Replace the output unit or load to
give the correct combination.
Program does not operate
normally
Check if ladder program in PLC is
correct.
Correct ladder program, as
necessary.
Power supply for output is
defective
Check the power supply.
Adjust or replace power supply.
Wiring and connection is defective
Check connection and wiring
between output equipment and
digital output unit.
Correct wiring and confirm all output
equipment and cables are connected
correctly.
Digital output unit is defective
–
Replace the digital output unit and
check correct operation.
Replace the output equipment and
check correct operation.
7
Digital output
equipment does not
operate normally
Output equipment is defective
–
If the problem continues, refer to the
output equipment manual.
Power supply for control and input
is defective
Check the power supply.
Adjust or replace power supply.
Input signal range setting is not
compatible
Check the specification of the
connected sensor.
Set the input signal range to suit the
sensor specification.
Analogue data format is not
compatible
Check the data format setting of
the analog input unit.
Set the data format of the analog
input unit to suit the
application/program.
Wiring and connection is defective
Check connection and wiring
between sensor and analog input
unit.
Correct wiring and confirm sensor
and cables are connected correctly.
Analog input unit is defective
–
Replace the analog input unit and
check correct operation.
Replace the sensor and check
correct operation.
8
Analogue input
sensor does not
operate normally
Defective sensor
–
If the problem continues, refer to the
sensor manual.
9
Other peripheral
units do not operate
normally
Defective peripheral units
Check if ladder program in PLC is
correct.
For further details, refer to the
relevant manuals of each peripheral
unit.
