1 Task and Solution
1.1 Task description
Description
For bigger or widely dispersed plants, multiple IO controllers are frequently used.
Every peripheral module of an IO device is assigned to a particular IO controller. If
sensors spatially close to one another must send data to different IO controllers,
multiple IO devices are required.
In this configuration description, an IO device shall be assigned to multiple IO
controllers.
Requirements
The following requirements have to be considered:
Reduction of the required network and system components
Sustained reduction of engineering costs and commissioning time
Easy communication between multiple IO controllers and an IO device.
1.2 Possible solutions
Description
The function “Shared Device” allows splitting up the modules of an IO device
between different IO controllers. This distribution allows flexible automation
concepts. You have the possibility, for example, to summarize peripheral modules
spatially close to one another into one IO device.
Diagrammatic representation
The following figure schematically shows the function “Shared Device”:
Figure 1-1
Shared Device allows a shared use of IO devices via multiple IO controllers without
additional CPU-CPU communication.
To Next Page
Loading...
Need help?
General
