ABB RELION REX640, Technical Manual, Page: 281 / 1960

Name Type Values (Range) Unit Description
3=Source 3
4=Source 4
3.20.18 Generic up-down counter UDFCNT
3.20.18.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Generic up-down counter UDFCNT UDCNT UDCNT
3.20.18.2 Function block
Figure 156: Function block
3.20.18.3 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.
3.20.18.4 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.
Figure 157: Functional module diagram
1MRS759142 F Basic functions
REX640
Technical Manual
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