ABB 650 series Engineering Manual page 59

1MRK 511 261-UEN -
650 series
Engineering Manual
The Execution Order and Instance Number are a combination that is predefined
within a product. It is possible to select a pair out of the list.
example how the drop down list could look like.
IEC08000269 V1 EN
Figure 33: 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 analogue data driven. Analogue data driven
applications require sample values from Analogue 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 analogue signal processing.
The Cycle Time can be selected to 5, 20 or 100 ms. Depending on function block
type and the 650 series product only one, two or all three 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 650 series products is organized in three time
classes, see Figure 34.
Protection and control engineering
IEC08000269.vsd
Section 5
Figure 33 shows an
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