BK9500 - Bus Coupler for USB

Trouble Shooting

If the BK9500 USB coupler is used with older TwinCAT versions, the following behavior occurs.

Error	Cause	Remedy
The TwinCAT System Manager does not recognize the connected USB coupler.	The higher level TwinCAT system must be stopped while the connection between the USB interface of your PC and the USB coupler is established! The TwinCAT System Manager cannot reliably recognize USB couplers that are switched on or that are connected to their USB network while the TwinCAT system is running.	▪ Stop the TwinCAT system ▪ Switch all the USB couplers off, or disconnect their USB connections to your PC ▪ Switch all the USB couplers on again, or connect them once more to your PC's USB interface ▪ Allow the TwinCAT System Manager to search for the USB couplers ▪ Start the TwinCAT system again
Although the TwinCAT System Manager does detect the connected USB coupler, the terminals that are connected to it are not seen	Terminals that are added while the TwinCAT system is running cannot be reliably detected by the TwinCAT System Manager.

Note

Update your TwinCAT version

These errors are fixed from the following TwinCAT versions. When using the BK9500 USB coupler, Beckhoff therefore recommends updating to this TwinCAT version or a later version!

•: TwinCAT version 2.8 (build 747) and

•: TwinCAT Version 2.9 (Build 947)

Access from the PC to the BK9500 USB coupler is always via the Beckhoff PC TwinCAT control software. Other drivers are not supported!