Analog input value is abnormal.
External DC24V input power is OK.
Supply DC 24 power
No
Yes
PE ground is OK
Correct PE grounding according to the wiring
in the user manual
No
Yes
Parameter setting is OK
(Operation channel permit, I/O range
setting
Set up the parameters correctly according to
the user manual
No
Yes
External voltage/current selector switch
setting is correct
Set the switch according to the user manual
No
Yes
Contact nearest dealer or A/S center
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