Lenze 8200 Frequency inverters - Manual (Page 284)

Application examples
8200SHB0199 15-5
Application FIG 15-2:
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.
Functions used
-
Internal PID controller for level control.
- Regular control, analog setpoint input via terminal 8 with feedback via
analog channel E1 with plug-in module 8279IB.
Code settings:
Code Name Possible settings IMPORTANT Code Name
Lenze Choice Info
IMPORTANT
C005 Configuration -0- -6- Operation with closed-loop control;
setpoint via terminal 8 with digital
frequency feedback via terminal E1
C007 ¤ Terminal
configuration
-0- -28- ... -45- or -48- ... -51- Act. level value via
terminal E1
C070 Gain PID controller 1.00 0.02 ... 0.1
C071 Integral action time
PID controller
100 0.2 ... 1 s Adaptation to process
C072 Differential
component of PID
controller
0.0 Inactive
C074 Influence PID
controller
0.0 100.0 %
C238 ¤ Frequency
precontrol
-1- -0- No precontrol
C239 ¤ Frequency setting
range
-0- -1- Unipolar Direction of rotation
cannot be changed via
the process controller.
All other parameters are based on the factory setting.
Set the rated motor data under C088 (rated motor current) and C091 (motor cos Ö) depending on the motor
connected.
Note!
-
Adapt C426 and C427 if the actual value input is 4 mA ... 20 mA.
(See chapter 3.7.1 and chapter 7.5.14.9)
-
Calibration of the setpoints and actual values to the application datum under
C500 and C501.
(See chapter 7.6.3)
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