Fixed Signal Function Block Fxdsign - ABB REB670 Applications Manual

1MRK 505 337-UUS -
13.6
13.6.1
13.6.2
Application manual
IEC09000310 V1 EN
Figure 172: Example designation, serial execution number and cycle time for logic
function that also propagates timestamp and quality of input signals
The execution of different function blocks within the same cycle is determined by the
order of their serial execution numbers. Always remember this when connecting two or
more logical function blocks in series.
Always be careful when connecting function blocks with a fast cycle time
to function blocks with a slow cycle time.
Remember to design the logic circuits carefully and always check the
execution sequence for different functions. In other cases, additional time
delays must be introduced into the logic schemes to prevent errors, for
example, race between functions.

Fixed signal function block FXDSIGN

Identification
Function description
Fixed signals
Application
The Fixed signals function FXDSIGN generates nine pre-set (fixed) signals that can be
used in the configuration of an IED, either for forcing the unused inputs in other function
IEC09000310-1-en.vsd
IEC 61850 IEC 60617
identification identification
FXDSIGN -
Section 13
Logic
ANSI/IEEE C37.2
device number
-
387