Generic Up-Down Counter Udfcnt; Function Block; Functionality; Operation Principle - ABB RELION 620 Series Technical Manual

1MRS757644 F
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620 series
Technical Manual
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Generic up-down counter UDFCNT

Function block

GUID-8BDF76AC-C4AE-43F1-98DF-B4942A21C45E V1 EN
Figure 102: Function block

Functionality

The generic up-down counter function UDFCNT counts up or down for each positive
edge of the corresponding inputs. The counter value output can be reset to zero or
preset to some other value if required.
The function provides up-count and down-count status outputs, which specify the
relation of the counter value to a loaded preset value and to zero respectively.

Operation principle

The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of UDFCNT can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
Basic functions
Description
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