In the example below, an existing old controller ("PROFIBUS master old") including existing periphery shall be replaced by a new controller. The peripherals are to remain unchanged after the old controller had been removed and should be operated with the new controller. Using the mirror mode, the new controller can be tested and commissioned in parallel to the running plant.

The PROFIBUS system of the old controller is connected to the X40 connection of ibaBM-DP. The new controller is connected to X41. ibaBM-DP automatically detects and then duplicates the slaves of the old system including input data of the new system. The new controller works with the duplicated slaves. Now the program can be tested with real input data. The output data will not be duplicated. Simultaneously, you can record data via ibaPDA from both PROFIBUS systems using sniffer modules.

Thus, you can compare the old system to the new system. In mirror mode, the data can also be acquired in compatibility mode 32Mbit.

For further information on the mirror mode, see chapter Mirror mode.