Mitsubishi Electric Melsec A Series - 5.1.2 Performance Specifications Comparisons

9. TROUBLESHOOTING
MELSEC-A
9.2.8 Flow chart used when output load of output module does not turn on
I Output load does not turn on.
NO Check output state in monitor
mode with programmer.
YES
OV
Supply
voltage
satisfactory.
OFF
';;'~--01 Measure voltage across module
input and COM terminal.
Check input signal in monitor
mode with programmer.
Check input signal in monitor
mode with programmer.
NO
•
Check voltage across
each output COM terminal
of output module.
Supply voltage
satisfactory .
Failure of output module
Change output unit.
Check rush current
developed conditions under
worse.
NG
Check external wiring and
external input equipment.
(Monitor signal off)
Check load wiring and load
and then restore the power.
Consult the sales repre-
sentative with details.
OK
POINT I
If the input signal or load is not switched off, see Section 9.4.
9-10