Signals - ABB RELION REX640 Technical Manual

Section 3
Basic functions
3.20.18.5
260
The operation of UDFCNT can be described with a module diagram. All the modules
in the diagram are explained in the next sections.
GUID-1E8AE6FE-A714-4024-82AE-4782635BCCAD V1 EN
Figure 134: Functional module diagram
Up-down counter
Each rising edge of the UP_CNT input increments the counter value CNT_VAL by one
and each rising edge of the DOWN_CNT input decrements the CNT_VAL by one. If
there is a rising edge at both the inputs UP_CNT and DOWN_CNT, the counter value
CNT_VAL is unchanged. The CNT_VAL is available in the monitored data view.
The counter value CNT_VAL is stored in a nonvolatile memory. The range of the
counter is 0...+2147483647. The count of CNT_VAL saturates at the final value of
2147483647, that is, no further increment is possible.
The value of the setting Counter load value is loaded into counter value CNT_VAL
either when the LOAD input is set to "True" or when the Load Counter is set to "Load"
in the LHMI. Until the LOAD input is "True", it prevents all further counting.
The function also provides status outputs UPCNT_STS and DNCNT_STS. The
UPCNT_STS is set to "True" when the CNT_VAL is greater than or equal to the setting
Counter load value. DNCNT_STS is set to "True" when the CNT_VAL is zero.
The RESET input is used for resetting the function. When this input is set to "True" or
when Reset counter is set to "reset", the CNT_VAL is forced to zero.

Signals

Table 246: UDFCNT Input signals
Name Type
UP_CNT BOOLEAN
DOWN_CNT BOOLEAN
RESET BOOLEAN
LOAD BOOLEAN
Default Description
0=False Input for up counting
0=False Input for down counting
0=False Reset input for counter
0=False Load input for counter
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REX640
Technical Manual