Lenze 8200 Frequency inverters - Manual (Page 156)

Configuration
8200SHB0199 7-19
7.5.5 Control mode
Code Name Possible settings IMPORTANT
Lenze Choice Info
C014 ¤ Control mode
820X -0- -0- Linear characteristic V f
d
with
auto boost
-1- Square characteristic V f
d
2 with
auto boost
-2- Linear characteristic V f
d
with
constant V
min
boost
-3- Square characteristic V f
d
2 with
constant V
min
boost
821X/822X/
824X
-4- -4- Motor-current control
Function Under C014 you can set the control mode and the voltage characteristic. It is also possible to adapt
your drive to different load characteristics:
- Linear characteristic for drives with constantly increasing load torques in relation to the speed
- Square-law characteristics for drives with a load torque squared in relation to the speed
Square-law V/f characteristics are mainly used for centrifugal pump and fan drives. It is however
necessary to check whether your individual pump or fan application can be driven with this control
mode.
- If your pump or fan drive cannot be operated with a square-law V/f characteristic, you should
select the control mode C014 = -0-, -2- or -4-.
820X V/f-characteristic control with auto boost
The control mode mentioned above enables low-loss operation of stand-alone drives with
three-phase AC standard asynchronous motors with load dependent V
min
boost.
C014 = -0-
Linear characteristic C014 = -1-
Square characteristic
(e.g. for pumps, fans)
1 0 0 %
0
0 1
f d
f d r
V m i n
0
0 1
f d
f d r
V m i n
V o u t
1 0 0 %
V o u t
A u t o b o o s t
A u t o b o o s t
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