Mitsubishi Electric MELSERVO HF-MP Instruction Manual page 7

(5) Corrective actions
When it is assumed that a hazardous condition may take place at the occur due to a power failure or a
product fault, use a servo motor with an electromagnetic brake or an external brake mechanism for the
purpose of prevention.
Configure a circuit so that the electromagnetic brake activates with the external emergency stop switch at
the same time.
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before
restarting operation.
Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.
(6) Maintenance, inspection and parts replacement
With age, the electrolytic capacitor of the converter unit and servo amplifier (drive unit) will deteriorate. To
prevent a secondary accident due to a fault, it is recommended to replace the electrolytic capacitor every 10
years when used in general environment.
Please contact your local sales office.
(7) Storage
Note the following points when storing the servo motor for an extended period of time (guideline: three or
more months).
Always store the servo motor indoors in a clean and dry place.
If it is stored in a dusty or damp place, make adequate provision, e.g. cover the whole product.
If the insulation resistance of the winding decreases, reexamine the storage method.
Though the servo motor is rust-proofed before shipment using paint or rust prevention oil, rust may be
produced depending on the storage conditions or storage period.
If the servo motor is to be stored for longer than six months, apply rust prevention oil again especially to the
machined surfaces of the shaft, etc.
Before using the product after storage for an extended period of time, hand-turn the servo motor output
shaft to confirm that nothing is wrong with the servo motor. (When the servo motor is equipped with a brake,
make the above check after releasing the brake with the brake power supply.)
When the equipment has been stored for an extended period of time, consult your local sales office.
Contacts must be opened when SON (Servo-on),
ALM (Malfunction) or MBR (Electromagnetic brake
interlock) turns off.
Servo motor
Electromagnetic brake
CAUTION
Contacts must be
opened with the EMG
stop switch.
SON RA
B
U
CAUTION
CAUTION
A - 6
24VDC