PLC Program for Water Level Control

Design a PLC program to control the level of a water storage tank by turning a discharge pump ON and OFF based on Low and High levels.

Table of Contents

Logic Description

Auto : if Auto Mode selected in Local Control Panel, then pump will be logically controlled based on Low Level Switch and High Level Switch
Manual : if Manual Mode Selected in Local Control Panel, then irrespective of Low Level Switch & High Level Switch Status, Pump will be controlled manually using ON/OFF button in Local Control Panel.
When the water level reaches low level then pump will be stopped.
if the level of the water reaches high point, the pump will started so that the water can be drained and thus lowering the level.
Indication Panel : This panel contains LED’s to show the status of the water level control. It has Pump Running, Low Level & High Level Signals
If pump is running then the Pump Running status lamp will be ON.
then, if Low Level Switch activated then Low Level Status lamp will be ON.
if High Level Switch activated then High Level Status lamp will be ON.

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4 thoughts on “PLC Program for Water Level Control Logic”

SIR, YOUR ARTICLES ARE SUPERB YOU ARE GREAT!!! THANKS A MILLION!!

Hi Sir

Thanks a lot for such a valuable details and information.

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Motor not starting when sensors dipped in water,
When sensors are directly connected motor starts? Whats the problem?

please which web site or link can I use ladder logic diagram for my project reference