Computer-assisted communication between automation components over a field bus is a standard approach in industrial control systems.
The RT 450 training system works with PROFIBUS DP. A PROFIBUS card performs the function of the field bus master and serves as the communications interface (CIF). The field bus slaves – in this case the controller module and the PLC module – must likewise be field bus-compatible. The components must be equipped with a PROFIBUS module to facilitate this operation.
One of the key features of the visualisation software, based on LabVIEW, is a chart which is used to present visuals of time functions. The software can also be used to operate and parameterise process controllers (RT 450.10 and RT 450.11). The communications interface (CIF) controls the data interchange between the software and the slaves.
Communication is bidirectional: changes made in the software are transmitted directly to the slaves. Controller settings made on the controller’s keypad are also transmitted to the software.
Data interchange between the software and the CIF is provided by way of an OPC server. An OPC server is the standard interface for interchange of process data.