Otis · DSD 412 Elevator System
Code 117 indicates serial communication did not start within 10 seconds after drive reset or power-up. Code 118 indicates a valid serial communication message was not received for more than 150 ms.
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Ensure the host is connected and sending valid messages.
Identify and correct electrical grounding noise interference problems.
If serial communication is not being used, verify parameter #110 is NOT set to selection 3.