.

FOXBORO CM400YJ



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

TC530 3BUR000101R1	ABB
TC530 3BUR000101R1 ABB TC530 3BUR000101R1 ABB TC530 3BUR000101R1 ABB CONTACT Trixie Skype&Whats-app: 86-135 9950 7613 Email:
GE FANUC	IC697CSE925
GE FANUC IC697CSE925 Want to buy best parts with a competitive price?Please
1747-L533
1747-L533 Company profile Cambia Automation Limited is a trade company in China. Main business have Bently Nevada , Honeywell , ABB , Allen Bradley , GE Fan...
16147-51-2	SIEMENS
16147-51-2 SIEMENS Contact MollyMobile/Skype/Whatsapp/ LimitedAbout CambiaAutomation LitimedCambia Automation Litimed is a company engaged in electronic products trad...
1794-IB8
1794-IB8 Our Business Scope Bently Nevada, ABB,GE,Rockwell,Foxboro, Invensys Triconex, Westinghouse,Schneider Modicon,Siemens,Woodward,GE FANUC, Motorola,Y...
供应产品

Same products

M2CT1242 挤出机串列推力滚子轴承
M2CT1242 挤出机串列推力滚子轴承 卖方: 串列推力圆柱滚子挤出机轴承厂家 M2CT1242 挤出机串列推力滚子轴承
Traditional Cylindrical Grinding Machine
Traditional Cylindrical Grinding Machine 卖方: Zhejiang Quanshun Machine Tool Co., Ltd. Description unit M1320H-Ax300 M1320H-Ax500 External grinding diameters mm Φ8-200 Φ8-200 C...
Spa Room that Diffusers Applied
Spa Room that Diffusers Applied 卖方: Mozzin Limited MOZZIN diffusers are crafted to blend seamlessly into any décor. Our aroma diffusers and h...
Rose for Diffuser
Rose for Diffuser 卖方: Mozzin Limited If you want to know more about the information about essential oil for living room, please contac...
Peppermint for Diffuser
Peppermint for Diffuser 卖方: Mozzin Limited If you want to know more about the best way to use frankincense essential oil / best way to use f...