Dynamic Data Transfer - ABB S800 I/O User Manual

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Figure 4-1
transferred back and forth between the user application and the actual process.
Controller
2 and 7
Input and output values are updated
as fast as possible (depends on the
configuration). Signal conditioning is
also performed in this loop.
1 and 8
Input and output values are updated
"as fast as possible" (depends on the
S800 I/O module configuration)
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gives an overview of how the exchange of dynamic process data is
Application
Program
& Data Base
5.
IN OUT
4.
Fieldbus Communication
Interface (FCI)
Dual Port Memory
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Dynamic Data Exchange
Communication Interface (CI)
Dual Port Memory
4 and 5
Cycle times for scanning input values are
configured in the controller.
Output values are directly written to the
CI memory.
Advant Fieldbus 100
3 and 6
3.
Cycle times for transfer of input and
6.
output values on AF 100 are configured
in the controller
Input Module
2.
7. Values
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Output Module
Chan x
Chan x
Values
8.
1.
Process
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