.

FOXBORO P0926WM



Characterization

PLC function instruction end high - voltage inverter PID closed-loop control

The requirements of closed-loop control of frequency converter put forward by users on site are as follows: frequency converter can automatically adjust the speed of frequency conversion pump according to the change of water consumption of the user system, ending the constant pressure water supply of pipe network;Together with the LCD can be set pressure target value.

According to the user's requirements, the PLC is equipped with special modules fx2n-4ad and fx2n-2da.Fx2n-4ad is an imitation input module with four input channels and a maximum resolution of 12 bits. The imitation input is planned to be -10v ~ 10V or 4 ~ 20mA.Fx2n-2da is a simulated output module, with 2 output channels and a maximum resolution of 12 bits. The output value of the simulated value is planned as -10v to 10V and maybe 4 to 20 mA.In this way, through reading instructions (FROM) and writing instructions (TO), as well as PID closed-loop control function instructions carried by PLC, it can end the PID closed-loop control of pipe network water pressure at the user's site.

The detailed programming process is as follows :PLC reading instruction (FROM) reads the response value of the user's water pressure, and the response value is stored in the D12 data address of the PID instruction with the moving instruction (MOV);The user's water pressure setting value is stored in the D10 data address in the PID command with the move command (MOV);D200 ~ D222 saves working parameters of PID;D14 is the operation value output of PID instruction. The PID closed-loop operation result D14 is written into the simulated output module through the writing instruction (TO) of PLC, and then converted into the simulated signal of -10v ~ 10V or 4 ~ 20mA into the high-voltage inverter controller for frequency setting.

The water supply network of the sewage treatment plant of pangang is huge, and the water pressure of the pipe network is slow to change the speed of the pump. Therefore, the calculation speed of PID should not be too fast, that is, the proportional dispatching should not be too fast. Otherwise, if the water pressure of the pipe network is suddenly changed too much, the frequency converter's dispatching simply constitutes a long time of vibration.According to this situation, as shown in figure 3, you can participate in the PLC control program PID distance accounting time (T0) and PID operation dead zone (M0), so that the PID accounting speed scheduling can be consistent with the pipe pressure change speed, to avoid the pipe pressure shock.

 

Conclusion

High voltage frequency converter bypass cabinet bypass logic control with PLC to automatically through work in pangang's sewage treatment plant of light high voltage frequency converter to simulate fault description, high voltage inverter automatic bypass cabinet in the transfer from variable frequency power frequency, frequency shift frequency of mutual switch is very convenient, can end within 10 s, greatly advance the reliability of the pump.The field PID closed-loop control effect is very ambitious, the water pressure is not firm very small, not firm beyond 0.1kg, frequency converter can sensitive regulation speed, the water pressure control in the setting and planning, the regulation speed will not occur any vibration.Through the serial port rs-232 communication between PLC and the controller of high voltage inverter, the system pipe pressure and various state quantities of PLC can be supervised on the LCD screen of high voltage inverter.

 

Packing and delivery items

Packing: Brand new and original in box

Lead time: 2-3 days against the payment

Terms of payment: Telegram transfer

Warranty: 1 year

Minimum order: 1

 

 

 

Products customers also like to search

 

6NG4212-8PA01-1DA0 AFS40S/AFS40D 45C340
6NG4212-8PA03-1AA0 AAI143-S03/A4S00 45C341
6NG4212-8PA03-1AB0 AFS10D/AFG10D 45C342
45C343 6NG4212-8PA03-1AC0 AAI141-S00/K4A00
45C344 6NG4212-8PA03-1AE0 EC401
IS210AEPSG2B 6NG4212-8PA03-1AD0 ARM55C ARM55C-000
6NG4212-8PA03-1AC0 6NG4212-8PA01-3BA2 SDV531-S33
S800   3BSE008510R1 6NG4212-8PA01-3AA2 SPW484-13
6NG4212-8PA01-2BA0 AAM51 S800 3BSE008508R1
6NG4212-8PA01-2CA0 ARS15B 45C364
6NG4212-8PA01-3CB3 SCB110-S0 45C37A
6NG4212-8PA03-1BA3 AMN34 45C37B




在线联系供应商

至: Cambia Automation Limited
Your E-mail:
消息正文:


Send to other suppliers

Other supplier products

ABB	CI810B 3BSE020520R1
ABB CI810B 3BSE020520R1 The introduction of ABB ABB is a pioneering technology leader that works closely with utilities, industry, transportation and infrastructure custo...
SDCS-CON-2A  ADT309600R0002	ABB
SDCS-CON-2A ADT309600R0002 ABB SDCS-CON-2A ADT309600R0002 ABB SDCS-CON-2A ADT309600R0002 ABB SDCS-CON-2A ADT309600R0002 ABB     Contact Us Sales Manager: Trixie S...
KJ2003X1-BA2	 Power Supply Module
KJ2003X1-BA2 Power Supply Module  About Emerson Emerson concentrates on the most complex and profound challenges facing the world in the process, industrial, commercial a...
F9900RR
F9900RR Company Overview Yokogawa is a leading provider of Industrial Automation and Test and Measurement solutions. Combining superior technology with eng...
1756-EN2T	ALLEN BRADLEY
1756-EN2T ALLEN BRADLEY Compactlogix 1769 CompactLogix 5370 Controllers Our Bulletin 1769 CompactLogix™ 5370 Controllers are part of the Integrated Architecture®...
供应产品

Same products

Digital Fish Feeder Timer Automatic Betta Fish Food Dispenser
Digital Fish Feeder Timer Automatic Betta Fish Food Dispenser 卖方: Guangzhou Senzeal Trading Co., Ltd Digital Fish Feeder Timer comes with a big size fish food dispenser box: 200ml. The LCD display, ...
Electronic Digital Fish Tank Thermometer with LCE Display
Electronic Digital Fish Tank Thermometer with LCE Display 卖方: Guangzhou Senzeal Trading Co., Ltd Fish Tank Thermometer with a large LCD display, easy to read. Temperature range: -10 TO 70℃. Moni...
24V Submersible DC Water Pump with Controller 35W/45W
24V Submersible DC Water Pump with Controller 35W/45W 卖方: Guangzhou Senzeal Trading Co., Ltd 24V Submersible DC Water Pump, Ultra-quiet, safe and energy-saving, comes with a controller for o...
Controllable Fish Tank Wave Maker 10W/25W/40W
Controllable Fish Tank Wave Maker 10W/25W/40W 卖方: Guangzhou Senzeal Trading Co., Ltd The best aquarium wave makeris controllable Fish Tank Wave Maker, which can simulate nature and p...
Aquarium Air Stone Bubbler Stone with LED Light
Aquarium Air Stone Bubbler Stone with LED Light 卖方: Guangzhou Senzeal Trading Co., Ltd Airstone can increase oxygen through an air pump. This bubble stone with 1W 7 colors LED Submersi...