MITSUBISHI ELECTRIC MOTION CONTROLLERS Q172DCPU - Manual (Page 10)

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(7) Corrective actions for errors
CAUTION
If an error occurs in the self diagnosis of the Motion controller or servo amplifier, confirm the
check details according to the instruction manual, and restore the operation.
If a dangerous state is predicted in case of a power failure or product failure, use a servomotor
with electromagnetic brakes or install a brake mechanism externally.
Use a double circuit construction so that the electromagnetic brake operation circuit can be
operated by emergency stop signals set externally.
Electro-
magnetic
brakes
Servomotor
24VDC
RA1 EMG
Shut off with servo ON signal OFF,
alarm, electromagnetic brake signal.
Shut off with the
emergency stop
signal(EMG).
If an error occurs, remove the cause, secure the safety and then resume operation after alarm
release.
The unit may suddenly resume operation after a power failure is restored, so do not go near the
machine. (Design the machine so that personal safety can be ensured even if the machine
restarts suddenly.)
(8) Maintenance, inspection and part replacement
CAUTION
Perform the daily and periodic inspections according to the instruction manual.
Perform maintenance and inspection after backing up the program and parameters for the Motion
controller and servo amplifier.
Do not place fingers or hands in the clearance when opening or closing any opening.
Periodically replace consumable parts such as batteries according to the instruction manual.
Do not touch the lead sections such as ICs or the connector contacts.
Before touching the module, always touch grounded metal, etc. to discharge static electricity from
human body. Failure to do so may cause the module to fail or malfunction.
Do not directly touch the module's conductive parts and electronic components.
Touching them could cause an operation failure or give damage to the module.
Do not place the Motion controller or servo amplifier on metal that may cause a power leakage
or wood, plastic or vinyl that may cause static electricity buildup.
Do not perform a megger test (insulation resistance measurement) during inspection.