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KFU 2-/4-
137
13.5 Reference
percentage
channel
The reference percentage channel combines various signal sources for definition of
the reference figures. The percentage scaling facilitates integration into the applica-
tion, taking various process parameters into account.
The
Reference Percentage Source
476
determines the additive assignment of the
available reference value sources depending on the hardware installed.
Reference Percentage Source
476
Function
1
-
Abs. value analog value
MFI1A
Reference value source is the multifunctional
input 1 in
Operation mode
452
- Analog signal.
10
-
Abs. value fixed percentage
value (FP)
The percentage according to
Fixed percent
change-over 1
75
,
Fixed percent change-
over 2
76
and the current data set.
11
-
Abs. value MFI1A + FP
Combination of the operation modes 1 and 10.
20
-
Abs. value Motorpoti (MP)
Reference value source is the function
Percent
Motorpoti Up
72
and
Percent Motorpoti
Down
73
.
21
-
Abs. value MFI1A + MP
Combination of the operation modes 1 and 20.
32
-
Abs. Val. Rep. Freq./PWM
Input (F3)
The frequency signal on the digital input ac-
cording to
Operation mode
496
for the PWM-/
repetition frequency input.
33
-
Abs. value MFI1A + F3
Combination of the operation modes 1 and 32.
90
-
Abs. value MFI1A + FP + MP
+ F3 (+ EM-S1INA)
1)
Combination of the operation modes 1, 10, 20,
32(+ analog input of an extension module).
1)
101 to 190
Operation modes with signs (+/-).
1)
The reference value source is only available if an optional extension module with
analog input is connected. For information, refer to the extension module operating
instructions.
13.5.1 Block
diagram
The following table describes the software switches shown in the circuit diagram as a
function of the selected
Reference percentage source
476
.
Switch position on circuit diagram
Operation
mode
MFI1A FP
MP
F3
Sign
1
1
Abs.
value
10
1
Abs.
value
11
1
1
Abs.
value
20
1
Abs.
value
21
1
1
Abs.
value
32
1
Abs.
value
33
1
1
Abs.
value
90
1
1
1
1
Abs.
value
101
1
+/-
110
1
+/-
111
1
1
+/-
120
1
+/-
121
1
1
+/-
132
1
+/-
133
1
1
+/-
190
1
1
1
1
+/-