Mitsubishi Electric MDS-E Series Instruction Manual page 446

MDS-E/EH Series Instruction Manual
7 Troubleshooting
Warning No.
Battery voltage drop
9F
The battery voltage that is supplied to the absolute position encoder dropped. The absolute position data is retained.
Investigation details
Change the used battery and check whether the
1 warning does not occur. (Turning the power OFF
and ON is required.)
Check whether the battery cable is disconnected,
2
broken, or wired incorrectly.
3 Measure the new battery voltage.
Check whether the cable connecting between the
4 battery box and CN9 is short-circuited, broken, or
wired incorrectly.
Disconnect the BT-LG cable of the battery box, and
5 then measure the voltage between DO(ALM) and
DOCOM terminals at power ON.
Perform a conductivity check with the encoder
cable between BT and LG of the drive unit in which
6 the warning was detected.
(Note) Make sure that the encoder side connector is
disconnected.
(Note 1) When warning 9F occurs, do not turn the drive unit power OFF to ensure that the absolute position data is held.
Replace the battery with the drive unit power ON.
In initial setup of ABS position
Warning No.
When the encoder with distance-coded reference marks is used, this warning is issued until the axis reaches the reference
A3
position during the initial setup of the distance-coded reference check function. This warning disappears after the axis has
reached the position.
Investigation details
1 Warning does not disappear.
Warning No.
Dual signal warning
A4
An input was detected in the signal related to the dual signal.
Investigation details
1 Warning does not disappear.
Warning No.
Fan stop warning
A6
A cooling fan built in the drive unit stopped.
Investigation details
1 Check the alarm No. "45" items.
Warning No.
Over regeneration warning
E0
Over-regeneration detection level exceeded 80%.
Investigation details
1 Check the alarm No. "30" items.
Investigation results
The warning does not occur.
The warning occurs.
The connection is faulty.
The connection is normal.
Less than 3.4V.
3.4V or more.
The connection is faulty.
The connection is normal.
Low voltage.
Equivalent of 24V.
Resistance value is low.
Resistance value is 100MΩ or more.
Investigation results
Encoder with
Stopped on the way to the
distance-coded
reference position.
reference marks
Investigation results
In emergency stop state?
Investigation results
Investigation results
415
Remedies
The battery has been drained.
Check the investigation item No. 2.
Correct the connection.
Replace the cable.
Check the investigation item No. 3.
Replace the battery.
Check the investigation item No. 6.
When a battery box is used, check the
investigation item No. 4.
Correct the connection.
Replace the cable.
Check the investigation item No. 5.
Replace the battery box.
Check the investigation item No. 6.
Replace the cable.
Replace the encoder.
(With the absolute position system, the zero
point must be established.)
Remedies
Setup again.
Remedies
Cancel the emergency stop.
Remedies
Remedies
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IB-1501229-F