IEC09000720 V2 EN-US
Figure 36: ACT: function block organization parameters
A minus sign in front of the cycle time, for example -200ms,
indicates that the application is time driven, otherwise the
application is analog data driven. Analog data driven applications
require sample values from Analog input modules - in case the
physical module is broken, applications are not executed. Time
driven applications are executed periodically regardless of the
status of the analog signal processing.
The Cycle Time can be selected to different values for certain functions. Depending
on the function block and IED type, one or more possibilities may be available.
The combination Execution Order, Instance Number is predefined by ABB. Mainly
for basic logic function blocks like for example AND, OR, a set of combinations
spread over the full range of execution orders is available. This gives the possibility
to select a combination which fits to the execution order range needed in that
application part.
Application configuration cycle time and execution order organization
The application execution within the IEDs is organized in different classes, see
Figure 37.
IEC09000737 V1 EN-US
Figure 37: Example of configuration cycle time and execution order
1MRK 511 398-UEN C Section 6
Protection and control engineering
670 series 2.2 IEC 73
Engineering manual
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