Diagnostics; Preliminary Checks - Mitsubishi Electric MELSEC FX2NC-16MT-D/UL Hardware Manual

FX2NC Series Programmable Controllers
7.

Diagnostics

7.1

Preliminary checks

POWER
RUN
Check power supply, ground and I/O cables are wired correctly.
BATT
ERROR
Turn the power supply on. Check the power LED is lit. Down load a small
test program into the PC using a handheld programmer or MEDOC. Verify
POWER
RUN
the program to ensure it has been written to the PC correctly. Using the pro-
BATT
gramming device forcibly turn ON/OFF each output. Check the output LEDs
ERROR
for operation.
Put the PC into RUN. Check the RUN LED is lit. Check the previously down
POWER
RUN
loaded program works correctly. Once all check are complete take the PC
BATT
out of run and turn OFF the power supply.
ERROR
During this testing stage take extrem care not to touch any live or hazardous
parts.
Diagnostics 7.
7-1