5: T
ROUBLESHOOTING
5-2
Analog I/O module does not work correctly (Ladder Refresh Type)
NO
YES
NO
YES
Is the status LED turned on?
Call IDEC for assistance.
Analog I/O module does not work
correctly (Ladder Refresh Type).
Make sure of correct parameters.
YES
After changing settings,
was the CPU stopped and
restar ted?
Stop and restar t the CPU to configure the
analog I/O settings.
Supply the rated power voltage
to the analog I/O module.
See pages 4-14 and 4-16.
Does the Status
DR store status code 2
(parameter configuration
error)?
NO
Are data registers
duplicated?
Change data register numbers to
eliminate duplicated data registers.
Does the Status
DR store status code 4
(external power supply
error)?
NO
Program M8120 (initialize pulse)
as an input for the ANST macro,
and stop and restar t the CPU.
Does the Status
DR store status code 1
(initializing)?
NO
YES
YES
NO
Is “Not used” selected
for the Signal Type?
Select a required Signal Type for the
channel to be used.
YES
NO
YES
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