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Error Code Error Message Description
M480 PLC Low Battery
PLC battery voltage is too low, malfunctioned, or absent
1. Check if PLC’s battery LED indicator on front cover is flashing.
2. Check if PLC’s battery is absent.
Solution: Replace/Add battery A.S.A.P.
Note: The error message can’t be disabled before the battery
problem is fixed, but the system is still functional.
Do not shut off power before the battery is replaced to prevent
data loss.
M481 PLC 24VDC Low
Insufficient DC24V supply voltage.
1. Measure and check the DC24V supply voltage. If insufficient,
check circuitry/sensor for any short circuit.
Note: This message only appears as warning.
M482 PLC Program Error
PLC Program has error
1. Reset the error. If the system can’t be reset, shut the power
down for 5 seconds and restart.
2. If error still persists, please contact the manufacturer.
3. Note: Usually caused by some calculation division by 0. Please
check any parameter that’s set as 0.
M484 Emergency Stop
E. Stop activated.
1. Reset Emergency Stop button.
2. Check PLC _ Input _ X07 circuitry.
M487 Servo motor alarm
Turn table servo motor alarm
1. Reset the error.
2. If error can’t be reset, open the control box cover and check
the servo error code on the amplifier LED display. Refer to the
servo motor manual for any information. Usually caused by
loosen connector or system collision.
If error can’t be reset, power off for 10 second and power ON
again. If error still persists, contact the manufacturer.
M492 Arc on failure
Arc ON signal time out.
1. After torch ON signal is activated, the system would wait 5
second for Arc ON signal. If this signal is not received, the
error is shown.
2. If the welder doesn’t have Arc ON signal, go to system setup
to disable this function. (Refer to section 2.15)
3. Inspect welder’s Arc ON signal cable, or check
PLCInputX10 circuitry
4. Check the torch, tungsten, and welding accessories.
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