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8.1.8.3
Functionality
The frequency measurement range is 35...75 Hz. The estimated frequencies outside
the measurement range are considered to be out of range and the minimum and
maximum values are then shown.
When the frequencies cannot be measured, for example, due to too low voltage
amplitude, the default value for frequency measurement can be selected with the
Def frequency Sel setting parameter. In the “Nominal” mode the frequency is set
to 50 Hz (or 60 Hz) and in “Zero” mode the frequency is set to zero and shown in
parentheses.
8.1.8.4
Signals
FMMXU Input signals
Table 614: FMMXU Input signals
Name
Type
Default
Description
F
SIGNAL
-
Measured system fre-
quency
8.1.8.5
Settings
FMMXU Non group settings
Table 615: FMMXU Non group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Operation
1=on
5=off
1=on
Operation Off / On
F high high limit
35.00...75.00
Hz
1
60.00
High alarm fre-
quency limit
F high limit
35.00...75.00
Hz
1
55.00
High warning fre-
quency limit
F low limit
35.00...75.00
Hz
1
45.00
Low warning fre-
quency limit
F low low limit
35.00...75.00
Hz
1
40.00
Low alarm frequen-
cy limit
F deadband
100...100000
1
1000
Deadband configu-
ration value for in-
tegral calculation
(percentage of dif-
ference between
min and max as
0,001 % s)
Table 616: FMMXU Non group settings (Advanced)
Parameter
Values (Range)
Unit
Step
Default
Description
Def frequency Sel
1=Nominal
2=Zero
1=Nominal
Default frequency
selection
1MRS758755 C
Measurement functions
REC615 & RER615
Technical Manual
593
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