Option Communication Error

What does bUS mean?

An error has occurred in the communication with an installed option card, such as a fieldbus communication card. This can stem from the drive not receiving a signal from the controller, incorrect or damaged communication cable wiring (short-circuited or disconnected), or significant electrical interference. An improperly installed or physically damaged option card can also trigger this fault, preventing the drive from responding to external commands.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify that the option card is correctly and securely installed in its slot within the drive.

2. 4

   If all wiring is confirmed correct and the fault continues, replace the option card as it may be damaged.