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Chapter 11 Troubleshooting
11–16
Alarm check timing
f1 F2 f3 f4
Alarm No.
34
CNC communication CRC error:
An error was detected in the data sent from the CNC to the driver.
–
{ { {
Investigation details Investigation results Remedies
The connector is disconnected (or
loose).
Correctly install. 1 Wiggle the connection cables by hand
between the CNC and drive unit,
between the battery unit and drive unit,
and between the drive units to see if any
of the connectors are loose.
Check whether any force is being
applied on the connectors.
The connector is not disconnected. Investigate item 2.
There is a connection fault. Replace the communication cable. 2 Turn the power OFF, and check the
connection of the communication cables
listed in item 1.
Try replacing the cables with normal
ones.
The connection is normal. Investigate item 3.
The version was changed. Replace with the original software version. 3 Check whether the CNC and drive unit
software versions have been changed
recently.
The version was not changed. Investigate item 4.
The alarm is on the unit side. Replace the drive unit. 4 Try replacing with another unit to
determine whether the fault is on the
CNC side or units side.
The driver is not the cause. Investigate item 5.
No abnormality is found in particular. Replace the MCP card on the CNC side. 5 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.
35
CNC communication data error:
An error was detected in the movement command data from the CNC.
–
{ {
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Investigation details Investigation results Remedies
1 Check the alarm No. "34" items.
Alarm check timing
f1 f2 f3 f4
Alarm No.
36
CNC communication, communication error:
The communication from the CNC was cut off.
–
{ {
–
Investigation details Investigation results Remedies
1 Check the alarm No. "34" items.
CAUTION
To prevent trouble, when changing the motor and driver combination, avoid
driving a driver with a larger capacity than the specified driver using the motor.
The motor could be demagnetized. Note that this combination can be used for
checking in the emergency stop state. The motor can be driven with a driver
with a capacity smaller than the specifications.