Orientalmotor aSTEP AZ Series, User Manual, Page: 16 / 180

Precautions for use
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5 Precautions for use
This chapter covers restrictions and requirements the user should consider when using the product.
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Common to AC power input driver and DC power input driver
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Be sure to use our cable to connect the motor and the driver.
Check the cable models on p.50 (AC power input driver) or p.85 (DC power input driver).
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When conducting the insulation resistance measurement or the dielectric strength test, be sure to
separate the connection between the motor and the driver.
Conducting the insulation resistance measurement or the dielectric strength test with the motor and the driver
connected may result in damage to the product.
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Storing data in the non-volatile memory
Do not turn off the control power supply 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 alarm of
EEPROM error to generate. The non-volatile memory can be rewritten approximately 100,000 times.
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Noise elimination measures
Refer to p.36 (AC power input driver) or p.73 (DC power input driver) for the noise elimination measures.
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AC power input driver
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Note on connecting a control power supply whose positive terminal is grounded
The USB communication connector and CN7 connector on the driver are not electrically insulated. When grounding
the positive terminal of the control 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.
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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 effect on
the surrounding equipment. The actual leakage current depends on the driver’s switching frequency, the length of
wiring between the driver and the motor, and so on. When installing an earth leakage breaker, use a product offering
resistance against high frequency current such as the one specified below.
Mitsubishi Electric Corporation: NV series
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If vertical drive (gravitational operation) such as elevating applications is performed or if sudden start-
stop operation of a large inertia is repeated frequently, connect our regeneration resistor RGB100 .
An alarm of overvoltage may be generated depending on the operating condition of the motor. When the alarm of
overvoltage is generated, reconsider the operating condition or use our regeneration resistor
RGB100 . Refer to
p.28 for the connection method.
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DC power input driver
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Note on connecting a main power supply and a control power supply whose positive terminals are
grounded
The USB communication connector and CN7 connector on the driver are not electrically insulated. When grounding
the positive terminals of the main power supply and the control 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.