User manual

5 Precautions for use
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5 Precautions for use
This section covers limitations and requirements the user should consider when using the product.
• Use the supplied cable to connect the motor and driver.
Always use the supplied cable to connect the motor and driver.
If a flexible cable or cable longer than 3 m (9.8 ft.) is to be used, an appropriate cable must be purchased
separately. Refer to “18 Options (sold separately)” on p.138.
• Conduct the insulation resistance measurement or withstand voltage test separately on
the motor and the driver.
Conducting the insulation resistance measurement or withstand voltage test with the motor and driver
connected may result in injury or damage to equipment.
• Do not apply an overhung load and thrust load in excess of the specified permissible limit.
Operating the motor under an excessive overhung load and thrust load may damage the motor bearings (ball
bearings). Be sure to operate the motor within the specified permissible limit of overhung load and thrust
load.
• Do not use the electromagnetic brake to reduce speed or as a safety brake.
The electromagnetic brake is of non-excitation type. Although it helps maintain the position of the load in the
event of power outage, etc., this brake cannot securely hold the load in place. Always stop the motor first, and
then use the electromagnetic brake to maintain the position of the load.
• 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 motor, and so on.
When providing a leakage current breaker, use the following products, for instance, which have
high-frequency signal protection:
Mitsubishi Electric Corporation: NV series
Fuji Electric FA Components & Systems Co., Ltd.: EG and SG series
• Preventing electrical noise
See “7.7 Installing and wiring in compliance with EMC Directive” on p.27 for measures with regard to noise.
• Do not apply impact to the encoder.
If the encoder receives strong impact, the encoder may be damaged or the motor may malfunction.
• About grease of geared motor
On rare occasions, a small amount of grease may ooze out from the geared motor. If there is concern over
possible environmental damage resulting from the leakage of grease, check for grease stains during regular
inspections. Alternatively, install an oil pan or other device to prevent leakage from causing further damage.
Oil leakage may lead to problems in the customer’s equipment or products.
• Saving data to the NV memory
Do not turn off the main power supply or 24 VDC power supply while data is being written to the NV
memory and 5 seconds after the completion of data write. Doing so may abort the data write and cause an
EEPROM error alarm to generate.
The NV memory can be rewritten approx. 100,000 times.
• Motor excitation at power ON
When the driver has been set to lock the servo after the motor stops in the position control mode or speed
control mode: Turning on the power supply will not excite the motor. To excite the motor, you must turn the
S-ON input ON.
You can set the motor to be excited automatically after the power has been turned on, by changing the
applicable driver parameter using the data setter OPX-2A or the data setting software MEXE02.