PROFIBUS

As PROFIBUS supports various different protocol variants, it is ideal for fast, time-critical data transfer, as well as for extensive and complex communication tasks. The COMSOFT PROFIBUS protocol driver supports all PROFIBUS protocol variants (L2, FMS, DP and DPV1) up to a baud rate of 12 Mbit/s. It can be operated as Master, Slave or combination Master.

In the combination Master mode, the individual protocol variants can be run in parallel. The protocol driver comprises the application layer interface (ALI) for PROFIBUS, simplifying the structure of the user interface.

In operation as L2 or FMS Master, ALI takes over the administration of its own object list and answers the requests of other participants autonomously, thus taking load off the application. In the DP Masteroperation, ALI generates a cyclic process image of the attached bus participants, which can be read and modified by the application at any time. Cyclic DP services and counter-cyclic DPV1 services (Master class 2) can be used simultaneously. In this way, an enhanced communication with complex units from the processing and automation area is realized.

In the DP Slave operation mode standard conformant DP Masters are supported. A GSD file for configuration of the Master is included in the scope of delivery. The operating modes DP, DPV1 Master and DP Slave are also supported by the COMSOFT OPC-Server.