Lenze E82EV752K4C - Fig. 10.8-3 Gain and Offset at Inverse Setpoint Selection; Fig. 10.8-4 Calculation Example for Gain and Offset

Configuration of analog and digital setpoints and actual values
Analog setpoints via terminal
10
Function library
10.8
10.8.2
L
10.8-7
EDS82EV903-1.0-11/2002
f
C0011
Deadband
Offset= -100 %, gain = -100 %
Offset >
-100
%
, gain
<
-100
%
Offset < -100 %, gain > -100 %
5V
10 V
20 mA
10 kHz
0V
0mA
0 kHz
Setpoint
signal
8200vec531
Fig. 10.8-3 Gain and offset at inverse setpoint selection
Example for inverse setpoint selection
A dead band of + 2 V (= 20 %) is to be set for an inverse setpoint selection
(0 ... + 10 V). Theoutput frequency is to be inversed the higher the setpoint signal
and is to reach - 30 % at setpoint +10 V.
f
C0011
(100 %)
Deadband
P1
P2
+10V
(100 %)
+2V
(20 %)
0V
(0 %)
-30 %
Setpoint
signal
8200vec532
Fig. 10.8-4 Calculation example for gain and offset
Gain [%] =
f(P
2
) − f(P
1
)
U(P
2
) − U(P
1
)
⋅ 100 % =
−
30 % − 100 %
100 %
− 20 %
⋅ 100% =−162.5 %
Offset (P
2
)[%]=
f(P
2
)[%]
Gain [%]
⋅ 100 % − U(P
2
)[%]=
−
30 %
− 162.5 %
⋅ 100 % − 100 % =−81.5 %
Inverse setpoint selection
Example for inverse setpoint
selection
Gain calculation
Offset calculation
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