Chapter 19 Troubleshooting - Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual

19
TROUBLESHOOTING
This chapter describes errors that may occur when the positioning module is used, and those troubleshooting.
19.1
Troubleshooting Procedure
If a problem occurs, perform troubleshooting by following the procedure below.
1.
Check that each module is mounted correctly.
MELSEC iQ-F FX5U User's Manual (Hardware)
MELSEC iQ-F FX5UC User's Manual (Hardware)
2.
Check the LEDs on the CPU module.
MELSEC iQ-F FX5U User's Manual (Hardware)
MELSEC iQ-F FX5UC User's Manual (Hardware)
3.
Check that each module is operating correctly with its LEDs. (Page 500 Checks with LEDs)
4.
Check the GX Works3 positioning monitor screen for any module errors. (Page 501 Check of module status)
Checks with LEDs
By checking the display status of LEDs, the problem can be primarily diagnosed without GX Works3 and the cause is
narrowed down.
The positioning module status can be checked with the RUN LED and the ERROR LED. The following table lists the
positioning module status and the corresponding LED displays.
: OFF, : ON, ●: Flashing (flashing interval: ON: 200 ms/OFF: 200 ms)
Positioning LED display
module status
Power is off AX1
AX2
Normal operation
AX1
(RUN LED is ON, AX2
ERROR LED is
OFF)
AX1
AX2
Operation failure AX1●
AX2
AX1
AX2
AX1
AX2
All LEDs are off
Check item
The power is not supplied.
The power supply connector is not connected correctly.
The power cable is not wired correctly.
19 TROUBLESHOOTING
500
19.1 Troubleshooting Procedure
Description
POWER Positioning module power is off
RUN
ERROR
POWER Axes stopped
RUN Axes on standby
ERROR
POWER Axes in operation
RUN
ERROR
POWER Minor error
RUN
ERROR
POWER Moderate error
RUN
ERROR●
POWER Error (Initialization not completed)
RUN
ERROR
Indication


The LED remains on from the positioning start until the axis
stops at completion of positioning or with an error.
Check the error code of the error using the positioning monitor
window of GX Works3 and take the action according to the list of
error codes.
Action
Check that the voltage supplied to the positioning module is within the rated
range.
Check if the power connector is inserted correctly.
Check for any issues in the wiring to the external power supply.