Table of Contents
MDS-E/EH Series Instruction Manual
7 Troubleshooting
Main side encoder: Error 4
Alarm No.
The motor side encoder (CN2 side) detected an error.
2E
(Note) It includes the linear scale in the case of linear motor.
As details differ for each encoder, refer to section "Encoder alarm".
Investigation details
1
Check the alarm No. "1B" items.
Main side encoder: Communication error
Alarm No.
An error was detected in communication data with the motor side encoder or with the linear scale of a linear servo system. Or the
2F
communication was interrupted.
Investigation details
Jiggle the encoder connectors (drive unit side and
1
encoder side) and check if they are disconnected.
Is the encoder cable wired in the same conduit as
2
the motor's power cable, or are the two cables laid
in parallel near each other?
Is the motor FG wire connected only to the drive unit
3
which drives it?
(Is the motor grounded to one point?)
Turn the power OFF, and check the encoder cable
4
connection with a tester. (Is the cable shielded?)
Replace with another unit, and check whether the
5
fault is on the unit side or encoder side.
Check if there is any abnormality in the encoder's
6
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Alarm No.
Over regeneration:
30
Over-regeneration detection level became over 100%. The regenerative resistor is overloaded.
Investigation details
Check if the regenerative capacity exceeds the
1
regenerative resistor tolerable capacity.
Check if the parameter is set incorrectly, and check
2
the values of sv036 and sp032.
3
Is an external regenerative resistor used?
Is the short wire connected between P and D
4
terminal? Are there any problems with the
connection condition?
Is the connection of the regenerative resistor or
5
regeneration resistor cable correct?
Is the regeneration resistor or the regeneration
resistor cable broken? Disconnect the regenerative
6
resistor terminal and check the resistance value
with a tester.
7
Check if the power supply voltage is too high.
IB-1501229-F
Investigation results
Investigation results
The connector is disconnected (or loose).
The connector is not disconnected.
The cables are wired near each other. (Noise
is entering from the power cable.)
The wires are sufficiently separated.
The motor FG wire is grounded on the motor
side.
The motor is grounded to one point.
The connection is faulty.
The connection is normal.
The alarm is on the drive unit side.
The alarm is on the encoder side.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
The regenerative capacity exceeds the
regenerative resistor tolerable capacity.
The regenerative resistor selection is
appropriate.
The parameters are set incorrectly.
The parameters are correct.
An external regenerative resistor is used.
A built-in regenerative resistor is used.
The wire is not connected.
The connector is disconnected.
The connector has a contact fault.
The connection is incorrect.
The connection is correct.
The regeneration resistor is broken. Or the
resistance value is large.
The regeneration resistor cable is broken.
The resistance value is normal.
The power supply voltage exceeded 253V.
The power supply voltage is normal.
394
Remedies
Remedies
Correctly install.
Check the investigation item No. 2.
Improve the cable wiring.
Check the investigation item No. 3.
Ground the motor to one point, connecting
the wires together on the drive unit side.
Check the investigation item No. 4.
Replace the encoder cable.
Check the investigation item No. 5.
Replace the drive unit.
Check the investigation item No. 6.
Remedies
Add the option regenerative resistor or
replace it.
Check the investigation item No. 2.
Change the parameters.
Check the investigation item No. 3.
Check the investigation item No. 5.
Check the investigation item No. 4.
Connect the wire.
Reconnect the connector.
Replace the connector.
Rewire.
Check the investigation item No. 6.
Replace the regenerative resistor.
Replace the cable.
Check the investigation item No. 7.
Review the power supply.
Replace the drive unit.
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SV SP
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Troubleshooting
