Lenze 8200 Frequency inverters - Manual (Page 127)

Commissioning
8200SHB0199 5-22
Application 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.
Functions used
-
Internal PID controller for level control.
- Regular control, analog setpoint selection 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 Adaptation to process
C071 Integral action time
PID controller
100 0.2 ... 1 s
Adaptation to process
C072 Differential
component of PID
controller
0.0 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.
- For the level setpoint observe the jumper setting at terminal 8 (see chapter 5.5.1).
Set 4 - 20 mA code C034 = 1.
- Set the rated motor data under C088 (rated motor current) and C091 (motor cos j) 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 5.4.2.4).
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