Diagnostics - Mitsubishi Electric FX2N-10PG User Manual

Model FX2N-10PG Pulse Output Block
10.

Diagnostics

If any trouble occurs, first check for loose terminal screws on the power supply unit, PLC and I/
O devices, and for poor contacts on FX
servo amplifier.
10.1 Diagnostics LED
LED
Status
name
POWER Unlit.
START Unlit.
Blinking Error occurrence
ERROR
Lit.
FP Unlit.
RP Unlit.
Unlit.
CLR
Lit.
Display details
5V DC is not supplied via the
extension cable from PLC.
START input OFF
CPU error
Forward pulse or pulse chain
stops.
Reverse pulse or direction
output stops.
CLR signal is not output.
CLR signal is output.
-10PG, and the connectors of the motor drivers and
2N
Unless LED is lit even though power is supplied to
PLC, check the following items.
• Properly connect the extension cable between
PLC and FX
• Properly supply the power of PLC.
• The service power of PLC may exceed the
supply power capacity. Disconnect the wiring
of the service power supply terminal, and turn
on the power supply.
• If LED is not lit even though START input of
FX -10PG is turned ON, check the input
2N
wiring.
External power supply (24V DC) is necessary
for START, DOG, X0 and X1 of FX
• An error occurs in FX
the content of the buffer memory (BFM#37),
take a countermeasure according to the
content.
For details of BFM#37, refer to Subsection
7.2.25.
• If does not return even though the power is
supplied again, contact your nearest system
service company of Mitsubishi Electric.
If LED does not blink even though each operation
is executed, check the following item.
• Using the program of PLC, check whether
each operation mode selection and the start
command are properly applied or not.
• When STOP command or forward/reverse limit
command is applied, the pulse output is not
output.
• When LED is not lit during zero return end or
CLR signal forced output, check whether zero
return operation and data set type zero return
with program of PLC, and forced output of CLR
signal are executed or not.
• If the deviation counter is not cleared in the
servo amplifier even though CLR signal is
output (LED is lit), check the output wiring. The
external power supply (5 to 24V DC) is
necessary for CLR output of FX
Diagnostics 10
Countermeasure
-10PG.
2N
2N
-10PG. After checking
2N
-10PG.
2N
10-1
-10PG.