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FX1S Series Programmable Controllers Diagnostics 7
7-1
7. Diagnostics
7.1 Preliminary Checks
Check power supply, ground and I/O cables are wired correctly.
Turn the power supply on. Check the power LED is lit. Down load a small
test program into the PLC. Verify the program to ensure it has been written
to the PLC correctly. Using the programming device forcibly turn ON/OFF
each output. Check the output LEDs for operation.
Put the PLC into RUN. Check the RUN LED is lit. Check the previously down
loaded program works correctly. Once all checks are complete take the PLC
out of run and turn OFF the power supply.
During this testing stage take extreme care not to touch any live or hazard-
ous parts.
POWER
RUN
ERROR
POWER
RUN
ERROR
POWER
RUN
ERROR