Unmanned water intake pump house
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Help! Could someone provide a PLC control scheme for an unattended remote water pumping station located 3 kilometers away from the factory facility, with 3 vertical pumps to be controlled (2 in operation and 1 as backup)? Thank you! !
It can be done using an RTU radio as well
Please give a detailed introduction on the 2nd floor.
1. For remote use, RTUs or PLC remote stations are employed. 2. For use within the factory premises, PLCs or DCS master stations are used. 3. Modebus or Profibus can be adopted (the choice depends on the manufacturer’s communication capabilities and cost considerations). 4. The communication medium can be radio waves, GPS, or CDMA, depending on the investment cost.
It can be fully achieved by using PLC control alone: 1) Install a flow switch at the water intake, and a pressure transmitter at each pump outlet, in order to carry out logical control based on pressure; 1) If the pressure is too high, it may indicate that there is a blockage at the pump outlet. Trigger an alarm and shut down the pump. 2», the pressure is too low; it may be due to a fault with the pump in use, and the system automatically switches to the backup pump. The pressure is still too low; there may be a blockage at the pump inlet, which triggers an alarm and causes the pump to stop. 2. Perform digital signal acquisition and judgment to determine whether the AC contactor for each pump is closed. 3. Use flow switches in combination with pressure and digital signals to carry out logical judgment and control.
3. It is possible to use Modbus or Profibus (the choice depends on the manufacturer’s communication capabilities and associated costs). Could you explain how the selection of protocol affects the investment cost? Thank you