PLC in sewage treatment - the application of the electric control system design Industrial control -

At the beginning of one, the introduction equipment technological process is: filter ( 3 minutes, can be set) — Filtering ( 6 - 12 hours, can be set) — Water ( Three minutes) — Qi chong ( 5 minutes, can be set) — Gas water ( 8 minutes, can be set) — Water ( 4 minutes, can be set) — Back to spurt

automatic state, if you call again after the blackout, the system will first all valves closed, then according to the system running process cycle.

2, electric control system of a sewage treatment system adopts centralized control method, using yi days programmable controller, the system is stable and reliable operation. Points to give priority to electric control system of electric control cabinet and HMI human-machine operation, action buttons, electromagnetic valve, trough and wire and cable, etc. The operation of the equipment in the operating lever on the touch screen, touch screen device in Chinese operating interface, starting operation, parameter setting, the current running state and fault information and other information.

K of the man-machine interface using Siemens - TP170micro, programmable controller used for yi day series of PLC, ( ETMX - MSDH32DC- T + ETEM - DH16 + ETEM - AH6- V）

man-machine interface are installed on the trichromatic lamp, when the indicator lights up means are:

red -- -- -- -- -- -- -- -- -- -- - Malfunction with the equipment

yellow -- -- -- -- -- -- -- -- -- -- - Equipment in the origin position

green -- -- -- -- -- -- -- -- -- -- -

equipment is in operation when there is failure, alarm discontinuities on the buzzer will appear.

when in emergency, can according to the operating system 'emergency stop' button on the handle.

three partially open, program control pumps

open flocculation pump

open fan

open mixer

start automatically

filtering time or system pressure exceeds limit

recoil signal

start at the beginning of the filter conditions

initial filter time

filtering time

gas burst time

jinyi day four, summary of PLC, the PLC of the excellent performance and stability, good performance in the frequent movement control, provides a better cost performance, greatly saves the cost for the user.

technology zone PLC controller application in the advantages of no negative pressure water supply control system is introduced the application of PLC in sewage treatment of electrical control system design of PLC and PC connected three ways to introduce d accused of man-machine interface and PLC application in the tile press equipment d LEVI70LK man-machine interface and PLC control in the application of the hot bending machine
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