Execution Order And Feedback Loops - ABB RELION 615 Series Engineering Manual

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5.1.4
615 series ANSI
Engineering Manual
GUID-4129D712-CD43-4729-8FE4-27FFE758D151-ANSI V1 EN
Figure 49: Application Configuration tool: an example of function block organization
parameters
The Cycle Time is automatically set to 2.5 ms (50 Hz) or to 2.083 ms (60 Hz) and it cannot
be modified. Depending on the function block type and the 615 series product, only one
or both possibilities may be available.
To automatically calculate the execution order, click Calculate
Execution Order on the tool bar.

Execution order and feedback loops

It is possible to draw multi-layer configuration logic that contains feedback loops with the
Application Configuration tool. The execution order of logic functions is calculated
automatically in the Application Configuration tool, but the execution order can also be
set manually. If the automatically calculated value causes the function to be executed one
task cycle time after the other logic functions in the same loop, the execution order number
can be set manually to prevent delays, for example, in output activation.
To perceive accurate time stamps from binary input signals to function
blocks, direct logic connection should be used in the Application
Configuration tool. Due to internal execution order, time stamps may not
Protection and control engineering
Section 5
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