CIF 50-SCM is a complete ready-to-use plug-in module providing the SERCOS interface hardware for digital intelligent drives on PC PCI systems. It handles all communication and synchronization tasks between the drives and the controller, providing a fast, economical and efficient solution for the connection of digital intelligent drives to a PC.

The application specific controller interchanges its data with CIF 50-SCM via a dual-port memory. CIF 50-SCM independently performs initialization, communication and diagnostics between controller and drives using its own microprocessor. The controller has access to all data to be exchanged.

A few basic inputs such as telegram type, number of drives or cycle time have to be set only once. The exchange of cyclic data such as command values, actual values and control or status signals is activated via transmission of a synchronization signal per each communication cycle between CIF 50-SCM and the controller. Within a specific time frame in the synchronization signal, the controller cyclically determines new command values, loads them into the dual-port memory and likewise, reads the actual values out. Thus the controller has access to all data to be exchanged with the drive as if it were an internal control register. The synchronization signal can be generated by either the controller or by CIF 50-SCM.