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arrangement and laying of cables. This also applies to equipment with the CE mark. It is the responsibility of
the manufacturer of the system or machine to ensure conformity with EMC limits.
Contact your supplier or Omron-Yaskawa Motion Control representative when using leakage current circuit
breaker in conjunction with frequency inverters.
In certain systems it may be necessary to use additional monitoring and safety devices in compliance with the
relevant safety and accident prevention regulations. The frequency inverter hardware must not be modified.
îš„6. Inverter Setup
This L7 inverter can drive induction motors as well as permanent magnet motors.
Always select the appropriate control mode:
• For induction motors use V/f, Open Loop Vector or Closed Loop Vector control (A1-01 = 0, 2 or 3).
• For permanent magnet motors use no other control mode than Closed Loop Vector for PM (A1-01 = 6).
A wrong control mode selection can damage the inverter and motor.
If a motor is exchanged or operated the first time, always set up the motor control relevant parameters using
the nameplate data or perform autotuning. Do not change the parameters recklessly. To ensure a safe operation
with PM motors always set the:
• correct motor data
• the PG open detection parameters
• the speed deviation detection parameters
• the over acceleration detection parameters
Wrong parameter settings can cause dangerous behavior or motor and inverter damage.
Refer to page 4-2, Start Up for details about the correct start up procedure.
îš„7. Notes
The Varispeed L7 frequency inverters are certified to CE, UL, and c-UL.
CAUTION
If a PM motor is turned by any external force, high voltage is generated in the windings.
• During wiring, maintenance or inspection make sure, that the motor is stopped and can not turn.
• If the inverter is turned off and the motor must be turned, make sure that motor and inverter output are
electrically disconnected.
CAUTION
If a permanent magnet motor is used, the peak current capability of the motor should always be higher than
the maximum inverter output current in order to prevent a demagnetization of the motor.
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