Diagnostics Plc - Mitsubishi Electric FX2N-10PG User Manual

Model FX2N-10PG Pulse Output Block
10.3

Diagnostics PLC

If any trouble occurs in the PLC connected to FX
operate since FROM/TO commands may not the provided.
Some errors which can be checked with PLC are partially described as follows:
For details of the wiring, special auxiliary relay and special data registers, refer to the PLC
instruction manual.
LED display of PLC
LED name
POWER
ERROR
• If any calculation error occurs in the PLC, the ERROR LED will continue unlit.
(Any command in which an calculation error occurs can not be executed.)
Using the programming device, check whether M8067 (calculation error flag) is ON.
Status Display details
• Power is not supplied to PLC.
Unlit. • The service power supply of PLC
may exceed the supply capacity.
Blinking Error occurs.
Lit. CPU error
-10PG, FX -10PG will not properly
2N 2N
Countermeasure
• Properly supply the power of PLC.
• Disconnect the wiring of the service
power terminal of PLC, and
resupply the power.
• An error occurs in PLC.
After checking the content of the
special auxiliary relay (M8060 to
M8060, M8109) and special data
register (D8060 to D8069, M8109),
take countermeasures according to
the content.
• Stop PLC. If LED is unlit when
power is resupplied, a watch dog
timer error may occur.
(The calculation time of the PLC
becomes long.)
• Check whether the program is in
such a state as the END command
is not executed owing to CJ
command or FOR/NEXT command
or not.
• In case of CPU error, repair is
necessary.
Consult a system service company
of Mitsubishi Electric.
Diagnostics 10
10-4