.

FOXBORO CM400YL



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.

4. 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

6AV3627-6QL00-1BC0 6NG4244-8PS02-5DF1 RS-422/RS-485
6AV3637-1LL00-0AX0 6NG4202-8PS04-4AD1 ACM12
6AV3637-1LL00-0AX1 6NG4243-2X AAV144
6AV3637-1LL00-0BX0 6NG4208-8PS02-1AB0 ADV561
6AV3637-1LL00-0FX1 6NG4208-8PS01 AMN33
6AV3637-1ML00-0BX0 6NG4208-8PS02-1AC0 ASD143
6NG4208-8PS02-1AA0 SAI143-H33 6AV3972-1XB00-0AA0
6NG4208-8PS01-0AC0 AFV10D-S41201 AFV10D-S41211 6AV4010-1AA00-0AA0
6NG4208-8PS01-1AB0 SED4D-11 6AV4010-1AA10-0AA0
6NG4208-8PS02-1AD0 ADR541 6AV4010-1AA10-0AB0



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

Allen bradley	2080-LC50-24QWB	panelview
Allen bradley 2080-LC50-24QWB panelview Rockwell automation :Allen-Bradley Allen-Bradley is the brand-name of a line of factory automation equipment, today owned by Rockwell Automation. T...
Bently nevada	3300/
Bently nevada 3300/ Company profile Comany Name:Cambia Automation Limited Address:No.83 Hubin East Road,Siming District Producs:Bently Nevada, ABB, GE, Rockwell, Fo...
NAMC-11C CART FOR ABB INVERTER
NAMC-11C CART FOR ABB INVERTER NAMC-11C CART FOR ABB INVERTER NAMC-11C CART FOR ABB INVERTER CONTACT Trixie Skype&Whats-app: 86-135 9950 7613 Email:
1756-IRT9I	ALLEN BRADLEY
1756-IRT9I ALLEN BRADLEY Allen Bradley 1746-A10 PRODUCT DESCRIBE: TheAllen-Bradley1746-A10 is a modular chassis used with the SLC 500 system. The1746-A10has 10 slots fo...
Bently Nevada USA	3300/15
Bently Nevada USA 3300/15 Bently Nevada USA 3300/15 Bently Nevada USA 3300/15 CONTACT Trixie Skype&Whats-app: see my profile Email:
供应产品

Same products

Aluminum Eyeliner Tubes
Aluminum Eyeliner Tubes 卖方: Ningbo Brilliant Cosmetic With high-quality products and good services, the company has increasingly become a supplier ...
SPORTS FABRIC MANUFACTURERS
SPORTS FABRIC MANUFACTURERS 卖方: Wujiang Zhong Fang Trading co., Ltd Wujiang Sigma Textile Co.,Ltd is famousChina sporty fabric manufacturersandsports fabric supplier...
YTO-X804 tractor
YTO-X804 tractor 卖方: Luoyang Roader machinery equipment Co., Ltd. YTO-X804 TRACTOR FEATURES1).The diesel engine, which is manufactured using advanced British techn...
YTO-X1204 tractor
YTO-X1204 tractor 卖方: Luoyang Roader machinery equipment Co., Ltd. YTO-X1204 TRACTOR FEATURES 1).The transmission system, which is manufactured using advanced Itali...
YTO-404 TRACTOR
YTO-404 TRACTOR 卖方: Luoyang Roader machinery equipment Co., Ltd. YTO-404 TRACTOR FEATURES 1).YTO engine delivers high fuel efficiency, generates low emissions, an...