Lenze 8200 Frequency inverters - Manual (Page 174)

Configuration
8200SHB0199 7-37
Subtractive influence
of the process controller Conditions:
- C051 = Positive actual value
- C181 = Select positive setpoint
- C238 = -1- (with frequency precontrol)
- Potentiometer connections of the dancer
- Beginning (A) = + 10 V
- End (E) = GND
The direction of control action of the process controller is substracted from the main setpoint.
Example of a dancer control with subtractive
influence of the process controller
M
3~
82XX V20
3
E
A
S
+10 V
0 V ... 10 V
~ V2
V2 V1
V
T
Function:
1.The dancer deflects to the bottom.
(V
T
increases)
2.V1 decreases.
Important Caution
The direction of rotation must not be changed, if the process controller is used as speed controller.
- If C070 = 0.0, the proportional component K
P
is not active.
- If C071 = 9999, the integral component K
I
is not active.
- If C072 = 0.0, the differential component K
D
is not active.
- The process controller is not suitable for inverse process control.
(Inverse control means that the speed becomes lower, if the actual value is lower than the
setpoint.)
Inverse controls are for instance, vacuum pressure control or humidity controls. Here, the 93XX
VECTOR should be used.
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