Precautions for use
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Precautions for use
This section covers limitations and requirements the user should consider when using the product.
Always use the accessory cable to connect the motor and driver.
When conducting the insulation resistance measurement and the dielectric strength test, be sure to
separate the connection between the motor and the driver.
Conducting the insulation resistance measurement or dielectric strength test with the motor and driver connected
may result in damage to the equipment.
Preventing leakage current
Stray capacitance exists between the driver’s current-carrying line and other current-carrying lines, the earth and the
motor, respectively. A high-frequency current may leak out through such capacitance, having a detrimental eff ect on
the surrounding equipment. The actual leakage current depends on the driver’s switching frequency, the length of
wiring between the driver and motor, and so on.When connecting an earth leakage breaker, use one of the following
products off ering resistance against high frequency current:
Mitsubishi Electric Corporation: NV series
Saving data to the non-volatile memory
Do not turn off the control power supply (24 VDC) while writing the data to the non-volatile memory, and also do not
turn off for 5 seconds after the completion of writing the data. Doing so may abort writing the data and cause an
EEPROM error alarm to generate. The non-volatile memory can be rewritten approximately 100,000 times.
If vertical drive (gravitational operation) such as elevator applications is performed or if sudden start-
stop operation of a large inertial load is repeated frequently, connect an accessory regeneration unit.
The overvoltage alarm may generate depending on the operating condition of the motor.
When the overvoltage alarm has generated, review the operating conditions or connect an accessory regeneration
unit. Refer to p.17 for connection method.
Note on connecting a power supply whose positive terminal is grounded
The USB communication connector, CN5, CN6 (*) and CN7 (*) connector are not insulated. When grounding the
positive terminal of the power supply, do not connect any equipment (PC, etc.) whose negative terminal is grounded.
Doing so may cause the driver and this equipment to short, damaging both. When connecting, do not ground
equipment.
* Excluding the pulse input type.