Connecting a Frequency Converter for Regulating the Performance of Sewage Pump Systems
In this article, we will discuss the connection scheme of a frequency converter for controlling sewage pumping systems.
Control of Sewage Pumping Stations (for Micro Drive FC 51 series)
Parameter Code | Parameter Name | Parameter Value |
0-10 | Active Set | [9] Multi Set-up - working with multiple parameter sets |
Settings for the first parameter set (automatic mode) | ||
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| Perform preliminary settings as per the section "Initial Parameter Setting of the Frequency Converter and Basic Parameters" (pages 50–51) |
3-02 | Min Setpoint | [0] min working level or min signal level from the sensor (see sensor labeling) |
3-03 | Max Setpoint | [10] max working level or max signal level from the sensor (see sensor labeling) |
3-15 | Setpoint Source 1 | [0] No function – no (not used, otherwise the speed setpoint will be the total of setpoints from sources 3-10, 3-15, and 3-16) |
3-16* | Setpoint Source 2 | [0] No function – no (not used, otherwise the speed setpoint will be the total of setpoints from sources 3-10, 3-15, and 3-16) |
5-12* | Digital Input Function Terminal 27 | [2] – coast inverse – not used (otherwise by factory settings the runaway function is inverse – i.e., when there is no signal at terminal 27, the mechanism runs out (start command is ignored)) |
5-11* | Digital Input Function Terminal 19 | [23] – set up select bit 0 – selecting parameters for automatic/manual modes |
5-40 | Green Light | indicates that power is supplied to the frequency converter and it is ready for operation/operating |
1-00* | Configuration Mode | [3] Process – mode of the PI controller |
7-20* | OS Source for PI Control (for VLT Micro Drive) | [2] Analog input 60 – analog input terminal 60 |
7-30 | Normal/inverse mode of operation of the controller | [0] normal (the speed of the mechanism is higher with + error (setpoint – signal from the sensor) (pressure)) |
7-33* | Proportional Coefficient of PI Regulation | [1] – adjustable for application |
7-34* | Integral Coefficient of PI Regulation | [8] – adjustable for application |
3-100* | Setpoint | Setpoint % from 3-03 – setpoint for support level in % from the maximum value |
* Be sure to input/check the values of these parameters.