The central online process data basis Iosys manages all the current process values.

The Iosys handles data storage, data distribution, and data management for the entire APROL system.

Read and write access

Different programs / clients (e.g. drivers for Controller, ParameterCenter) supply the Iosys with process values.

These process values are then used by other programs / clients (e.g. DisplayCenter on the operator station).

Master/Slave functionality

The same programs / clients run on both runtime servers, with one of the two being used as the master runtime server responsible for the process control.

Changing process control when error occurrs

The redundancy software immediately switches from the master runtime server to the slave runtime server when an error occurs (e.g. the master runtime server loses the network connection to the controllers) without data loss.