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SToF alarm fault code in yaskawa GA500 drive

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Cause : Safe Torque OFF Hardware comes when the Safe Disable input signal is wired incorrectly or one of the two terminals H1-HC or H2-HC received the Safe Disable input signal.

  1. There is internal damage to one Safe Disable channel.
  2. Make sure that the Safe Disable signal is input from an external source to terminals H1-HC or H2-HC.
  3. When the Safe Disable function is not in use, use a jumper to connect terminals H1-HC and H2-HC.
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