TwinCAT libraries
A TwinCAT library is available for all Beckhoff controller families (BC, BX, CX and IPC) for the operation of the KM6551-0000 under TwinCAT. This library takes care of communication with the terminal. It sets parameters in or reads parameters from the terminal. The use of the library simplifies communication with the terminal for the user.
ZIP file TC_KM6551.zip: 
sample file
Copy the libraries into the TwinCAT\PLC\Lib directory.
Other required libraries:
For Bus Terminal Controllers from the BCxx00 series
- Standard.lb6
- PlcHelper.lb6
For Bus Terminal Controllers from the BCxx20 and BCxx50 series
- Standard.lbx
- TcBaseBCxx50.lbx
- TcSystemBCxx50.lbx
For Bus Terminal Controllers from the BXxxxx series
- Standard.lbx
- TcBaseBX.lbx
- TcSystemBX.lbx
For 386-based systems such as Industrial PCs, Embedded PCs (CX)
- Standard.lib
- TcBase.lib
- TcSystem.lib
The user can write his own function blocks for the operation of the KM6551-0000 under other controllers.