Panasonic FP0R - ALL Leds Are off; If ERROR LED Is on

11-5
11.2.2 If ERROR LED is ON
Condition: The system watchdog timer has been activated and the operation of PLC has been
activated.
Procedure 1
Set the mode selector of PLC from RUN to PROG. mode and turn the power off and then on.
• If the ERROR/ALARM LED is turned on again, there is probably an abnormality in the FP0R control
unit. Please contact your dealer.
• If the ERROR/ALARm LED is flashed, go to chapter 11.2.1.
Procedure 2
Set the mode selector from PROG. to RUN mode.
• If the ERROR/ALARM LED is turned on, the program execution time is too long. Check the program.
Check
(1) Check if instructions such as “JMP” or “LOOP” are programmed in such a way that a scan never finish.
(2) Check if interrupt instructions are executed in succession.
11.2.3 ALL LEDs are OFF
Procedure 1
Check wiring of power supply.
Procedure 2
Check if the power supplied to the FP-X control unit is in the range of the rating.
• Be sure to check the fluctuation of the voltage.
Procedure 3
Disconnect the power supply wiring to the other devices if the power supplied to the FP-X control unit is
shared with them.
• If the LED on the control unit turn on at this moment, increase the capacity of the power supply or
prepare another power supply for other devices.
• Please contact your dealer for further questions.