Mitsubishi Electric C70, Руководство по установке

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Appendix 2 Explanation of Alarms
MITSUBISHI CNC
566
Alarm No.
32
Power module overcurrent
Overcurrent protection function in the power module has started its operation.
Investigation details Investigation results Remedies SV SP
1
Disconnect the power cable (U, V, W) from
the unit
’
s terminal block and motor, and
check whether a short-circuit between the
power cable or whether conduction at both
end of wiring occurs with a tester.
[1] Before disconnecting the power cable,
the cable connector or screw has been
loosened.
[2] The short-circuit condition persists even
after disconnecting the cable from the unit
and motor.
[1] Tighten it.
[2] Check the motor wiring.
[3] Replace the power cable.
There is no problem. Check the investigation item No. 2.
2
Check the motor insulation with a (megger)
tester.
-Between motor power and ground earth
Less than 1M . (Grounding)
Replace the motor.
1M or more. (Normal)
Check the investigation item No. 3.
Check the unit capacity.
[1] The same size but smaller than the
selected capacity.
[2] The combination of the motor and axis is
alternated in a 2-axis unit. The capacity is small.
The smaller capacity side was used in 2-
axis unit.
Replace to the unit of the selected capacity
or change the axis.
The motor meets the selected capacity. Check the investigation item No. 3.
3 Check the current loop gain parameters.
Different from the standard parameter
settings.
Adjust the value to the standard setting.
Equivalent to the standard parameter
settings.
Check the investigation item No. 4.
4
Jiggle the detector connectors (drive unit
side and detector side) and check if they are
disconnected. The connector is disconnected (or loose). Correctly install.
The connector is not disconnected. Check the investigation item No. 5.
5
Turn the power OFF, and check the detector
cable connection with a tester.
Connection is faulty. Replace the detector cable.
Connection is normal. Check the investigation item No. 6.
6 Check the repeatability.
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 8.
The error is always repeated. Check the investigation item No. 7.
7
Replace with another unit, and check
whether the fault is on the drive unit side or
detector side. The alarm is on the drive unit side. Replace the drive unit.
The alarm is on the detector side. Replace the detector.
8
Check for any abnormalities in the unit's
ambient environment.
(Ex.: Ambient temperature, noise,
grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
Alarm No.
33
Overvoltage:
The main circuit bus voltage exceeded the tolerable value.
Investigation details Investigation results Remedies SV SP
1 Is an external regenerative resistor used?
An external regenerative resistor is used. Check the investigation item No. 3.
A built-in regenerative resistor is used. Check the investigation item No. 2.
2
Is the short wire connected between P and
D terminal?
Are there any problems with the connection
condition?
The wire is not connected. Connect the wire.
The connector is disconnected.
The connector has a contact fault. Reconnect the connector.
Replace the connector.
The connection is correct. Check the investigation item No.6.
3
Is the combination of the used regenerative
resistor and drive unit appropriate?
The combination is incorrect. Replace the correct regenerative resistor.
The combination is normal. Check the investigation item No. 4.
4
Is the connection of the regenerative
resistor or regeneration resistor cable
correct? The connection is incorrect. Rewire.
The connection is correct. Check the investigation item No. 5.
5
Is the regeneration resistor or the
regeneration resistor cable broken?
Disconnect the regenerative resistor
terminal and check the resistance value with
a tester. The regeneration resistor is broken.
Or the resistance value is large.
Replace the regenerative resistor.
The regeneration resistor cable is broken. Replace the cable.
The resistance value is normal. Check the investigation item No. 6.
6
The acceleration/deceleration time constant
is too short.
At acceleration/deceleration, has the speed
overshoot reached to the current limit? Reached to the current limit.
The speed overshoot is applied. Increase the acceleration/deceleration time
constant.
The connection is normal. Replace the drive unit.