Lenze 8200 motec frequency inverter 0.25kW-7.5kW - Manual (Page 108)

Function library
Configuration of analog and digital setpoints and actual values
7−37
L
EDB82MV752 EN 5.2
Inverse setpoint selection
f
C0011
Deadband
Offset=
-100
%,
gain
= -100
%
Of
fset
>
-100
%,
gain
<
-100
%
Offset
< -100
%,
gain
> -100
%
5 V
10 V
20 mA
10 kHz
0 V
0 mA
0 kHz Setpoint
signal
8200vec531
Fig. 7−10 Gain and offset at inverse setpoint selection
Example of inverse setpoint selection
A dead band of +2 V (= 20 %) is to be set for an inverse setpoint selection (0 ... +10 V). The output
frequency is to be inverted with an increasing setpoint signal and is to reach −30 % at setpoint +10 V.
f
C0011
(100 %)
Deadband
P1
P2
+ 10 V
(100 %)
+ 2 V
(20 %)
0 V
(0 %)
-30 %
Setpoint
signal
8200vec532
Fig. 7−11 Calculation example for gain and offset
Gain calculation
Gain [%] +
f (P
2
) * f (P
1
)
U (P
2
) * U (P
1
)
@ 100 % + * 30 % * 100 %
100 % * 20 % @
100% + * 162.5 %
Offset calculation
Offset (P
2
) [%] +
f (P
2
) [%]
Gain [%]
@ 100 % * U (P
2
) [%] + * 30 %
* 162.5 % @
100 % * 100 % + * 81.5 %