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.
shows an example how
the drop down list could look like.
IEC08000269.vsd
IEC08000269 V1 EN
Figure 32:
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
.
1MRK 511 245-UUS -
Section 5
Protection and control engineering
650 series ANSI
57
Engineering Manual
