Constant pressure water supply system water - PLC application

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constant pressure water supply system water

electrical system of constant pressure water supply

1. Control requirements

at present, in accordance with the pipe network pressure of water supply of housing and urban-rural development service specification requirements, urban water supply service pressure of 0. 14 mpa, the pressure can only guarantee the water supply to 3 ~ 4 floors; Above and on the fourth floor is the category of secondary water supply of water supply. General city average actual pipe network pressure reaches 0. More than 3 mpa, far higher than the national standard, basic can meet the requirements of six storeys users in the city water pressure. But consider from the Angle of safe operation, individual 6 or 6 layers above the user due to the geographical position is higher, the public water supply pipe network pressure can not meet the requirement of the user, must increase the secondary water supply facilities.

two water supply system, now in general use as shown in the above of constant pressure water supply system. In order to meet the domestic water and fire water, general also set the two pressure value, water pressure water supply according to the life at ordinary times, when a fire can be manual or automatic switch to the pressure of fire water supply, this example fire water pressure is set to 0. 90MPa。

2。 Program debugging explanation

constant pressure water supply system control program, including subroutine, interrupt program and the main program.

subroutines used for declaring parameters, when boot or fire water and living water supply switch is carried out.

interrupt program, calculating the average five times detection as PID instruction detection input values. Every 100 ms at the same time the actual values calculations for PID instruction standard input value, and the PID algorithm as output value calculation for the actual analog output value of 0 ~ 32000.

main program, conditional execution subroutine, statement parameters.