Fieldbus command connection error

Description

Fieldbus command arg cannot be sent to I/O device arg because there is no active connection.

Consequences

Fieldbus command not sent.

Recommended actions

1. Check fieldbus command syntax.
2. Make sure the network cable is plugged into the controller.
3. Make sure the power supply of I/O device is normal.
4. Make sure the wiring to the I/O device is connected correctly.