Mitsubishi Electric C70, Setup Manual

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Appendix 2 Explanation of Alarms
MITSUBISHI CNC
570
Alarm No.
43
Feedback error 2
Excessive difference was detected in position data between the motor side detector and the machine side detector.
Investigation details Investigation results Remedies SV SP
1
Check if the connecting pulley ratio of the
spindle end to ABZ pulse encoder meets the
machine specifications.
The pulley ratio of the spindle end to
encoder is 1:1.
Check the parameter setting.
The spindle end and encoder are not equal
in the pulley ratio.
Check the parameter setting.
When the encoder is smaller than the
spindle end in the pulley ratio, replace the
pulley.
No problem. Check the investigation item No. 2.
2
Check the setting value of the spindle
parameter from SP057 to SP064.
The correct values are not set. Correctly set.
The correct values are set. Check the investigation item No. 3.
3
Check the spindle parameter SP054 setting
value.
V-belt is used for the spindle end driving. Set "-1" to the spindle parameter "SP054".
Other than V-belt (gears or timing belt) is
used for the spindle end driving.
Set "360" to the spindle parameter "SP054".
SP054 is set corresponding to the machine
specifications.
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
Is the detector cable wired in the same
conduit as the motor's power cable, or are
the two cables laid in parallel near each
other? The cables are wired near each other. Noise
is entering from the power cable. Improve the cable wiring.
Divide it by a FG shield.
The wires are sufficiently separated. Check the investigation item No. 6.
6
Is the motor FG wire connected only to the
drive unit which drives it?
(Is the motor grounded to one point?) The motor FG wire is grounded on the motor
side. Ground the motor to one point, connecting
the wires together on the drive unit side.
The motor is grounded to one point. Check the investigation item No. 7.
7
Turn the power OFF, and check the detector
cable connection with a tester. (Is the cable
shielded?) The connection is faulty. Replace the detector cable.
The connection is normal. Check the investigation item No. 8.
8
Replace with another unit, and check
whether the fault is on the unit side or
detector side. The alarm is on the drive unit side. Replace the drive unit.
The alarm is on the detector side. Check the investigation item No. 9.
9
Check if there is any abnormality in the
detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
10 Check SP019, SP020, SV019, and SV020.
Parameter is set incorrectly. Correctly set.
Parameter is set correctly. Check the investigation item No. 11.
11 Check the alarm No. "1B" items.
Alarm No.
45
Fan stop
A cooling fan built in the drive unit stopped, and overheat occurred in the power module.
Investigation details Investigation results Remedies SV SP
1
Turn the unit power ON again, and confirm
the rotation of the fan.
Note) Assure more than 10 seconds for the
time from when the power is turned OFF till
when it is turned ON. For the fan used for
the drive unit, assuring more than 10
seconds for the time from when the power is
turned OFF till when it is turned ON is
required.
The fan is rotating, and an alarm did not
occur again.
Continue to use.
The power may be turned ON without
assuring more than 10 seconds for the time
from when the power is turned OFF till when
it is turned ON.
Leave for more than 10 seconds, and turn
the power ON again.
The fan did not rotate. Or, an alarm
occurred again.
Check the investigation item No. 2.
2
Check if the connector connected to a fan is
loosened or disconnected in the unit.
[1]The connector is loosened.
[2]The connector is disconnected. Correctly connect the connector.
Replace the fan.
[1]The connector is not loosened.
[2]The connector is not disconnected.
Check the investigation item No. 3.
3
Check if oil or cutting chips are adhered to
the fan.
Oil or cutting chips are adhered.
Improve the use environment and
replace the drive unit.
Oil or cutting chips are not adhered.
The cable may be broken. Replace the fan.
Replace the drive unit.