Operating hardware
4.4 Media redundancy
CP 1604 / CP 1616
Operating Instructions, 02/2017, C70000-G8976-C218-08
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Note the following about the data status if two IO controllers write to the same module:
Note
The local data status of a module written
by two IO controllers is only GOOD if the local
status of both writes is GOOD.
Configuring IO routing
Description
You configure the IO router in the STEP 7/NCM PC program.
In principle, the IO router is configured as follows.
1 Configure the CP 1616:
• As IO device for the IO controller of the control level.
• As IO controller for the process level.
2 Configure the IO router:
• Reading input modules is illustrated by example 1.
• Writing outputs bit-oriented is illustrated by example 2.
Note
For a more detailed description of the configuration of IO routing, refer to the configuration
manual "Commissioning PC Stations".
Media redundancy
Overview
This section answers the following questions:
● Which topologies are possible?
● What is media redundancy and how does it work in a ring topology?
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