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Validating the Safe Disable Function

After you replace parts or do maintenance on the drive, first complete all necessary wiring to start the drive, then test the Safe Disable input with these steps. Keep a record of the test results.

Note:

This validation should be performed at least once every three months in order to guarantee the specification values of the safety parameters.

  1. When the two input channels are OFF (Open), make sure that the keypad flashes STo [Safe Torque OFF], and make sure that the motor is not running.

  2. Monitor the ON/OFF status of the input channels and make sure that MFDO set to the EDM function operates as shown in Table 1.

    If one or more of these items are true, the ON/OFF status of the MFDO may not display correctly on the keypad:

    • Incorrect parameter settings.

    • A problem with an external device.

    • The external wiring has a short circuit or is disconnected.

    • There is damage to the device.

    Find the cause and repair the problem to correctly display the status.

  3. Make sure that the EDM signal operates during usual operation as shown in Table 1.