Siemens SIMATIC NET CP 1604 - Configuring IO Routing; Media Redundancy

Operating hardware
4.4 Media redundancy
CP 1604 / CP 1616
Operating Instructions, 02/2017, C70000-G8976-C218-08
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Data status
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.
4.3.9
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.
Step
Description
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".
4.4
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?