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3.17.12.4
Operation principle
The function can be enabled and disabled with the
Operation
setting. The corresponding
parameter values are “Enable” and “Disable”.
The operation of CTR can be described with a module diagram. All the modules in the
diagram are explained in the next sections.
GUID-9D9880AB-4CA7-4DD5-BA0C-C1D958FC04F6 V1 EN
Figure 100:
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.
1MAC059074-MB A
Section 3
Basic functions
615 series ANSI
197
Technical Manual
Содержание Relion 615 series
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