
B-63494EN/02 8.MAINTENANCE
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8.2.4 Alarms Displayed on the Spindle Unit
No. Meaning Description
16 RAM Alarm An error occurred in a spindle RAM test.
Replace spindle amplifier module.
69 Safety speed over The spindle software detected that the speed of the spindle motor exceeded the safety
speed (parameter No. 4372/4438/4440/4442) in safety signal mode C (state in which a
guard open request is input, and the guard is open).
When the guard is open, perform operation at a speed not exceeding the safety speed.
Check the safety speed parameter(parameter No.4372/4438/4440/4442).
Replace spindle amplifier module.
70 Illegal axis data The spindle software detected a mismatch between the spindle amplifier connection
state and spindle amplifier hardware setting.
If this alarm is issued because the spindle amplifier configuration is changed, correct the
setting on the spindle amplifier side.
Check the spindle amplifier connection state and spindle amplifier hardware setting.
Replace the CPU card or spindle amplifier module.
If this alarm is issued because the spindle amplifier configuration is changed, correct the
setting on the spindle amplifier side.
71 Safety parameter error The spindle software detected a safety parameter error.
Set the safety parameter again.
Replace the CPU card or spindle amplifier module.
Relative parameters are as follows.
No.4372, No.4438, No.4440, No.4442
72 Mismatch the results of
motor speed check
The spindle software detected a mismatch between the CNC result of the motor speed
check and the spindle result of it.
Replace the CPU card or spindle amplifier module.
74 CPU test alarm An error occurred in a spindle amplifier CPU test.
Replace spindle amplifier module.
75 CRC alarm An error occurred in a spindle ROM CRC test.
Replace spindle amplifier module.
76 Inexecution of safety
functions
Any safety function was not executed.
Replace spindle amplifier module.
77 Mismatch the results of
axis number check
The spindle software detected a mismatch between the CNC result of the axis number
check and the spindle result of it.
Replace the CPU card or spindle amplifier module.
78 Mismatch the results of
safety parameters
check
The spindle software detected a mismatch between the CNC result of the safety
parameters check and the spindle result of it.
Replace the CPU card or spindle amplifier module.
79 Inexecution of safety
functions at power-up
The safety functions at power-up for spindle were not executed. Replace the spindle
amplifier.
Replace spindle amplifier module.