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Chapter 11 Troubleshooting
11–9
11-7 Troubleshooting for each servo alarm
[Alarm/warning check timing]
f1: When servo driver power is turned ON
f2: When CNC power supply is turned ON (emergency stop ON)
f3: During normal operation (servo ON)
f4: During axis removal (ready ON, servo OFF)
(Note) Note that warning "93" could occur even when the axis is reinstalled after removal.
Alarm check timing
f1 f2 f3 f4
Alarm No.
12
Memory error:
Error in drive unit memory IC (SRAM, FROM)
{
– – –
Investigation details Investigation results Remedies
The error is always repeated. Replace the drive unit. 1 Check the repeata bility.
The state returns to normal once, but
occurs sometimes thereafter.
Investigate item 2.
No abnormality is found in particular. Replace the drive unit. 2 Check if there is any abnormality in the
unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the causes of
the abnormality.
Ex. High
temperature ... Check the
cooling
fan.
Incomplete grounding .… Additionally
ground.
Alarm check timing
f1 f2 f3 f4
Alarm No.
13
Software process error:
The driver's software processing time did not end within the specified time, or an
illegal IT process was carried out.
–
{ { {
Investigation details Investigation results Remedies
The version was changed. Try replacing with the drive unit containing
the original software version.
1 Check whether the servo software
version was changed recently.
The version was not changed. Investigate item 2.
The error is always repeated. Replace the drive unit. 2 Check the repeatability.
The state returns to normal once, but
occurs sometimes thereafter.
Investigate item 3.
No abnormality is found in particular. Replace the drive unit. 3 Check if there is any abnormality in the
unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the causes of
the abnormality.
Ex. High
temperature ... Check the
cooling
fan.
Incomplete grounding .… Additionally
ground.
Alarm check timing
f1 f2 f3 f4
Alarm No.
14
Software processing error 2:
The current loop process, of the driver software processing times, did not end within
the specified time.
–
{ { {
Investigation details Investigation results Remedies
The version was changed. Try replacing with the drive unit containing
the original software version.
1 Check whether the servo software
version was changed recently.
The version was not changed. Investigate item 2.
The error is always repeated. Replace the drive unit. 2 Check the repeatability.
The state returns to normal once, but
occurs sometimes thereafter.
Investigate item 3.
No abnormality is found in particular. Replace the drive unit. 3 Check if there is any abnormality in the
unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
An abnormality was found in the
ambient environment.
Take remedies according to the causes of
the abnormality.
Ex. High
temperature ... Check the
cooling
fan.
Incomplete grounding .… Additionally
ground.