Topic Description
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A CE (Communications Error) fault indicates no control data was received from the connected PLC when using serial communications. Typically this fault occurs when the bypass control board is communicating with a PLC via Modbus, BACnet MS/TP, Apogee, or Metasys and communication is lost for the duration of time set in parameter Z3-06.
Note:
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A CE fault may often be referred to as a Serial Comm Error.
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If the bypass control board loses communications with the drive, a CE fault will be present on the drive. The bypass will display FB10 (No Drive Comms) in this case.
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Resolution
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Refer to the below recommendations when troubleshooting a CE (Communications Error) fault:
- For minor interruptions, increase the Serial Communication Fault Time in parameter Z3-06.
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Note: It is recommend to increase this setting when several drives are on the same network
- Inspect the connections at TB3 of the bypass control board for poor shielding or faulty communication wiring.
- Separate communication wires from high voltage wires such as motor power or incoming voltage power cables.
- If noise is a known issue, add an EMC filter to help reduce any induced electrical noise.
- If intermittent CE faults are occurring, refer to the document below:
- If a CE fault occurs when switching from line power to generator power or when a momentarily power loss occurs, refer to the document below:
- If an FB10 or AL10 (No Drive Comms) is followed by a CE fault, refer to the document below:
- If an AL14 (Serial Comm Error) alarms occurs, refer to the following document:
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