The British witten PLC in the application of programmable filter machine

The British witten PLC in the application of programmable filter on dongguan sense electric co. , LTD. Welcome to visit e exhibition hall 3 compressor/separation/filtration machinery exhibition hall compressor, air compressor, filter, filter, filter oil machine,. 。 。 Speaking of filter press the industrial products, small number of people are familiar with, is mainly used for solid-liquid separation. The material through the pressure to filter, and is widely used in chemical industry, pharmacy, metallurgy, sewage treatment and other fields. For program control pressure filter, is a process of sequence control, step by step, not lack of step, or jump step, due to the special working condition, also need to be done at any time suspend output automatic switch, emergency stop, manual operation, etc. This point, it is necessary through the programmable controller ( PLC) To control. Electrical control part is the control center of the whole system, it mainly by the frequency converter, PLC, protector, air switches, circuit breakers, intermediate relay, contactor, buttons, lights, etc. Automatic filter press process of transformation is to rely on PLC internal timer, counter, intermediate relay and PLC external trip switch, proximity switch, electric contact pressure gauge ( Pressure relay) Conversion, control button, etc. The working process of the automatic filter press can be divided into high pressure unloading, opening and closing, loosen, turning board, plate, pressure, pressure and pressure, etc. , the process is: the high pressure unloading - — The flap open - — Loosen the - — Take the board - — Pull board -- — The flap closed - — Compression - — Pressure in the PLC controller for manual and automatic respectively made of two pieces, with a jump instruction to run the corresponding application: use the manual/automatic switch button to jump instruction, manual jump automatically command, as shown in figure 1; Automatically when, on the other hand, as shown in figure 2. For automatic program, using the step relay to control each working procedure, as shown in figure 3. Because of the need for manual/automatic operation at any time, all didn't use the function command sequence. I also try to use the function of the sequence diagram, by the way, feel not so comfortable, before is to use Siemens PLC, with skilled will be good. For manual application, using the alternate output commands, realized the function of single start-stop button, as shown in figure 4. And of course indispensable reset the program, I put it into a subroutine, conditions in the main program, through the call, Figure 5 and figure 6) 。 The advantage is: can separate subrou tines exported to a file, each edit different program calls later can. Need to appreciate is that the British witten provide bulk reset instruction is in good condition, ZRST) 。 Good design drawings, programmed, installation of power distribution cabinets, entity. Computer debugging, electrical cabinet attached images: the machine pictures: have to say INVT communication function is not decoration, tested, I had a communication program using INVT and domestic hayley's inverter communication, no problem at all. Summary, INVT PLC controller on the equipment has been running for more than a month, fully adapt to the environment and conditions of filter press complex. Performance outstanding, the outward appearance is able to bear or endure look, the function instruction from soup to nuts, not inferior at European and Japanese PLC. Finally, if you have a good cost performance, hope good sales can do bigger and stronger leading domestic PLC controller.
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