Troubleshooting; Troubleshooting Using Leds - Mitsubishi FX2N-10GM Hardware / Programming Manual

FX Series Positioning Controllers
10.

Troubleshooting

When an error has occurred first, check whether or not the supply voltage is correct and
whether or not loose terminal screws or imperfect contact of connectors can be found on the
positioning unit or the I/O units.
10.1

Troubleshooting using LEDs

The error condition can be found by checking the status of the various LEDs provided on the
positioning unit.
LED names
Power indication
"POWER" LED DISPLAY
• If the POWER LED is not lit when the power is turned ON, disconnect the various I/O units.
If the POWER LED is lit correctly with the units disconnected,
1) The 24V DC service power supply exceeds its capacity (with the FX
• With the FX
entered or another error has occurred. In this case, replacement of the fuse is not sufficient.
Contact the Mitsubishi Service Center.
Ready status
"READY" LED OFF
• The READY LED is lit without regard to the mode (MANU or AUTO) while the positioning
unit is ready for accepting various operation commands (Refer to Section 8.1.7.).
If the READY LED is OFF,
1) While positioning is performed (pulses are being output).
→ Enter the stop command or change over the mode from AUTO to MANU to stop the
operation and light this LED.
2) When an error has occurred.
→ Check the reason for the error, and remove the cause.
-20GM, a fuse inside the unit may be blown out when conductive objects have
2N
Troubleshooting 10
-20GM).
2N
10-1