upper computer.
Example: Pin 25 is connected to 0V and Pin 8 to the
upper computer.
When the servo is in normal state, the upper computer is
able to receive the electrical level of 0V.
When the servo alarms, 0V is disconnected from the
upper computer (normal close).
●Electrical level inversion or normal open/ normal close
switching can be done via Parameter PA57.
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