Lenze 8210 HVAC Series, Operating Instructions Manual

Page: 59 / 94

Commissioning
821XKlimaBA0399
5-21
Task (FIG 5-3 ):
In a tank the water is to be held at a constant level. The speed of
the pump must be controlled depending on the amount of water
delivered. This is an inverse control, i.e. if the sensor has reached
its max. signal, the pump speed must be at its minimum and vice
versa.
Functions used
-
Internal PID controller for level control.
- Normal control, analog setpoint selection via terminal 8
with feedback via analog input E1 with plug-in
module 8279.
Code settings:
Code Name Possible settings IMPORTANT Code Name
Lenze Selection
IMPORTANT
C005 Configuration -0- -6- Operation with closed-loop control;
setpoint via terminal 8 with digital
frequency feedback via terminal E1
C070 PID controller gain 1.00 1.00 Adapt to process
C071 Readjustment time
PID controller
100 100ms Adapt to process
C072 Differential
component PID
controller
0.0 0.0 Adapt to process
C074 PID controller
influence
0.0 100.0%
C238 Frequency
precontrol
-1- -0- no precontrol
C239 Frequency setting
range
-0- -1- unipolar Direction of rotation
cannot be changed
with the process
controller.
All other parameters are based on the factory setting.
Set the rated motor data (depends on the motor used) under C088 (rated motor current) and C091 (motor cos
Ö
).
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