Mitsubishi Electric Q173CPU User Manual page 170

6 INSPECTION AND MAINTENANCE
Do not short circuit, charge, overheat, incinerate or disassemble the batteries.
The electrolytic capacitor will generate gas during a fault, so do not place your face near the Motion
controller or servo amplifier.
The electrolytic capacitor and fan will deteriorate. Periodically change these to prevent secondary
damage from faults. Replacements can be made by our sales representative.
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, in order to prevent that
state, use a servomotor with electromagnetic brakes for maintenance 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.
If an error occurs, remove the cause, secure the safety and then resume operation after alarm release.
The unit may suddenly restart 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.)
Confirm and adjust the program and each parameter before operation. Unpredictable movements may
occur depending on the machine.
Extreme adjustments and changes may lead to unstable operation, so never make them.
Do not apply a voltage other than that specified in the instruction manual on any terminal.
Doing so may lead to destruction or damage.
Do not mistake the terminal connections, as this may lead to destruction or damage.
Do not mistake the polarity ( + / - ), as this may lead to destruction or damage.
Do not touch the servo amplifier's heat radiating fins, regenerative resistor and servomotor, etc., while
the power is ON and for a short time after the power is turned OFF. In this timing, these parts become
very hot and may lead to burns.
Always turn the power OFF before touching the servomotor shaft or coupled machines, as these parts
may lead to injuries.
Do not go near the machine during test operations or during operations such as teaching. Doing so
may lead to injuries.
Do not bunch the control wires or communication cables with the main circuit or power wires, or lay
them closely. They should be installed 100 mm (3.94 inch) or more from each other.
Trying to bunch or install could result in noise that would cause operation failure.
CAUTION
!
Shut off with servo ON signal OFF,
alarm, electromagnetic brake signal.
Servomotor
Electro-
magnetic
brakes
6 - 3
Shut off with the
emergency stop
signal(EMG).
RA1 EMG
24VDC