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. Onc e all chec ks a re complete tak e 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