Mitsubishi FX2N-10GM, Hardware / Programming Manual

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FX Series Positioning Controllers Troubleshooting 10
10-2
Error indication
"ERROR" LED lit
• When an error has occurred during operation, the ERROR LED is lit or flashes. In this case,
read the error code using a peripheral unit, refer to "10.2.3 Error list" to find the reason for
the error, then remove the cause. The common errors are as follows.
1) Parameter error
Error code:2004 (maximum speed)
→
If the unit system adopted is the mechanical system, the setting can be 200 kHz or
more when converted into pulses.
2) Program error
Error code: 3000 (no program No.)
→
This error occurs when an attempt is made to execute a program whose program No.
does not exist. Monitor PARA 30 (program No. specification) as well as D9261/D9260
(X axis) and D9461/9460 (Y axis) to make sure that a correct program No. is specified.
3) Program error
Error code 3001 (no m02 (END) command)
→
"m02 (M102 in a subtask)" is not programmed at the end of the program specified to
be executed.
4) External error
Error code: 4004 (limit switch actuation)
→
Check PARA 20 (limit switch logic).
CPU error
"CPU-E" LED lit
• If the CPU-E LED is lit when the power of the positioning unit is turned ON in MANU mode,
a watchdog timer error has occurred. In this case, check whether the battery voltage is low,
whether abnormal noise sources are present, or whether inductive foreign objects are
present.
It is recommended to perform Class 3 grounding (Grounding resistance: 100
Ω
or less) of
as short a distance as possible using a wire of 2 mm 2 or more as described in Section 3.
BATT.V error
"BATT V" LED lit (FX
2N
-20GM)
• If the battery voltage is low, the BATT V LED is lit by the 5 V power supply when the power
is turned ON; the special auxiliary relay M9143 is actuated. When approximately 1 month
has passed after low battery voltage is detected and the BATT V LED lit, programs (when
RAM memory is used) and various memories backed up by the battery cannot be held dur-
ing power interruptions.
Make sure the battery is replaced soon.
Class 3
grounding
Positioning
unit
Drive unit
Motor or
other
At least 2 mm 2 , grounding
separately from strong