dl-breadcrumbs__homedl-breadcrumb-item__separatorConfiguration and programmingdl-breadcrumb-item__separator...dl-breadcrumb-item__separatorSystem technologydl-breadcrumb-item__separatorSystem technology of CPU and overall systemdl-breadcrumb-item__separatorCommunication with PROFINET redundancy
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Communication with PROFINET redundancy dl-permalink__symbolPermalink

In a high availability system one of the following redundancy solutions can be configured:

Normally, two PROFINET IO controllers CM579-PNIO connect to the devices simultaneously. One controller establishes a primary connection that is identical to a regular PROFINET connection. The second controller establishes a special ‘backup’ connection. This connection doesn’t contain any valid output data and doesn’t allow the secondary controller to change any options on the devices. If the primary controller fails, the second parallel controller takes over the tasks of the first.

How to set-up and configure PROFINET redundancy communication based on HA-Modbus TCP (without CI52xs modules) is described in the application example ‎⮫ PROFINET redundancy.

Network redundancy

The Media Redundancy Protocol allows in smaller systems rings of Ethernet switches to overcome any single failure with a maximum recovery times in the following range: 10 ms, 30 ms, 200 ms and 500 ms.

⮫ “Network redundancy”