15 Operating Parameters
15.3 Administrative
253
SICAM MMU 7KG9663, Device Manual
E50417-H1040-C514-A3, Edition 01.2016
Explanation for the Parameter Threshold Method
1)
These statements refer to a jump of the measured value (measured value remains the new value), no pulse-
type change.
Explanation for the Parameter Threshold Calculation
Setting Value
Description
-none-
No threshold procedure selected.
With each alteration, measured values are immediately transmitted (as
spontaneous event).
Fixed
In comparison with the last transmitted value, if the current value has changed
more than the parameterized threshold value (positive or negative), a
measured value is transmitted.
Integrated
In comparison with the last transmitted value, changes of the current value are
summarized every 500 ms (without consideration, whether the change is
positive or negative).
If this sum has exceeded an amount depending on the setting of the threshold
value, then the current measured value at that time is transmitted (as
spontaneous event).
In this:
•
A change
1)
of the measured value is transmitted after 2.5 s, if the measured
value change is twice as big as the parameterized threshold value.
•
A change
1)
of the measured value is transmitted after 5 s, if the measured
value change is in the size of the parameterized threshold value.
•
A change
1)
of the measured value is transmitted after 10 s, if the measured
value change is twice as small as the parameterized threshold value.
Fixed and integrated
Combination of the 2 methods
Fixed
and
Integrated
as described in the
preceding rows.
In contrast to
Integrated
, changes which are bigger than the parameterized
threshold value will be transmitted without delay.
Setting Value
Description
Absolute (in unit of the
measured value)
The threshold value is a fixed value expressed in the unity of the measured
value and regardless of the current value of the measured value.
Example: 5 V (for the voltages)
Relative (in percentage
related to the last
transmitted measured
value)
The threshold value varies, depending on the last transmitted measured
value. Therefore it is for smaller measured values smaller than for larger
measured values.
Example: 10 %
Last transmitted measured value: 100 V
Current threshold value: 10 V
Last transmitted measured value: 20 V
Current threshold value: 2 V
If the last transmitted measured value is equal to zero, then a measured
value modification is immediately transmitted.
To avoid unnecessary transmission of the small changes around zero point
at AC current and AC voltage as well as derived measured values, use the
parameter zero-point suppression (see chapter 15.1.1).
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