Connecting the frequency converter part 11

Connecting the frequency converter for pump control in tanks

The wiring diagram for connecting the frequency converter for regulating the performance of pumps in a tank is presented below:

Example of frequency converter wiring diagram

Another example of connecting a converter

Frequency converter connection diagram

Controlling the pump rotation speed

For effective control of the pump rotation speed, which operates with a storage capacity, it is necessary to perform the initial setup of the frequency converter according to the basic parameters.

Main regulation parameters

Parameters for connecting the frequency converter:

Parameter Code

Parameter Name

Parameter Value

3-02

Min Setpoint

[0] minimum rotation frequency setpoint

3-03

Max Setpoint

[50] maximum rotation frequency setpoint

3-15

Setpoint Source 1

[0] No function – not used (otherwise, the speed setpoint will be the sum of setpoints from sources 3-10, 3-15, and 3-16)

3-16*

Setpoint Source 2

[0] No function – not used (otherwise, the speed setpoint will be the sum of setpoints from sources 3-10, 3-15, and 3-16)

5-10

Digital Input Function (terminal 18)

[8] – Start – command to start (terminal 18)

5-15*

Digital Input Function (terminal 33)

[2] – Coast inverse – inverse coast (start command is ignored with no signal at terminal 27)

5-400

Relay Function 1

[2] Drive Ready – drive is ready for operation (green light indicates power supply to the converter)

5-12

Input Function 27

[17] Preset ref bit 1 – setpoint bit 1 (speed selection when T2 and T1 are closed)

5-13*

Input Function 29

[18] Preset ref bit 2 – bit 2 for speed selection

5-11*

Input Function 19

[16] Preset ref bit 0 – bit 0 for speed selection

3-101*

Fixed Speed 1

[0] Speed in % of 3-03 – stop upon activation of sensor 1

3-102*

Fixed Speed 2

[60] Speed in % of 3-03 – optimal speed for activating sensor 2

3-103

Fixed Speed 3

[90] Speed in % of 3-03 – fast ramp speed when sensor 3 is activated

3-104

Fixed Speed 4

[100] Speed in % of 3-03 – maximum speed for activating sensor 4

* Make sure to enter/check the values of these parameters, as they may differ from factory settings.