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10. Troubleshooting
10 - 12
Alarm No.
34
NC-DRV communication: CRC error:
An error was detected in the data received from the CNC.
Cause of occurrence Investigation items Remedy
1
Terminator or battery unit is faulty. Try replacing the terminator or battery
unit.
Replace the terminator or battery unit.
Check the continuity to check for
breakage.
Is the communication pair wire
connected in reverse?
2
NC bus communication cable is faulty.
Try changing the order of the connected
drive units.
Replace the cable.
3
Communication circuit operation is
incorrect.
Check for abnormalities in the unit's
surrounding environment, etc.
(Example: Ambient temperature, noise,
grounding)
Improve the surrounding environment.
Alarm No.
35
NC command error:
The travel command data that was received from the CNC was excessive.
Cause of occurrence Investigation items Remedy
1
Movement command data is excessive. Is the rapid traverse rate large for a
submicron system or rotation axis?
Check the feedrate limit.
Alarm No.
36
NC-DRV communication: Communication error:
The communication with the CNC was interrupted.
Cause of occurrence Investigation items Remedy
1
NC bus communication cable is
disconnected.
Check the connector connection (CN1A,
CN1B).
Correctly connect.
2
NC bus communication cable is broken.
Check the cable continuity. Replace the cable.
Alarm No.
37
Initial parameter error:
An incorrect parameter was detected among the parameters received from the CNC at the power ON.
This is displayed as "S02 initial parameter error ####" on the NC screen. ####: Error parameter No.
Cause of occurrence Investigation items Remedy
1
Parameter settings exceed the setting
range.
Check the setting range of the error
parameter No.
Correctly set.
2
Electronic gears are overflowing.
Error parameter No. is 2301.
Check SV001, SV002 and SV018.
Review the specifications.
3
Absolute position detection parameter
is valid.
Error parameter No. is 2302.
Check SV017 (bit7).
Absolute position control cannot be
used. If necessary, replace with an
absolute position detector.
4
No SHG control option provided.
Error parameter No. is 2304.
Check SV057 and SV058.
SHG control cannot be used.
5
No adaptive filter option provided.
Error parameter No. is 2305.
Check SV027 (bitF).
Adaptive filter cannot be used.
(Note) Refer to "10-4-3 Parameter numbers at initial parameter error".
Alarm No.
38
NC-DRV communication: Protocol error 1:
An error was detected in the communication frames received from the CNC.
Cause of occurrence Investigation items Remedy
1
Carry out items for alarm No. 34.