FOXBORO P0400YE
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
Other supplier products
Bently nevada transducer | Proximity Sensors and Transducers Customers who rely on mission-critical machinery choose our proximity sensors to monitor conditions and protect ... | |
1771-NB4T distributors | Rockwell automation :Allen-Bradley Allen-Bradley is the brand-name of a line of factory automation equipment, today owned by Rockwell Automation. T... | |
P0700WB 24V dc Digital Output | Details The Channel Isolated, Discrete I/O Interface Modules (FBM241/b/c/d) have eight discrete input channels and eight discrete output chan... | |
kokusai 3HOT018070 | AboutKokusai Electric Kokusai Electricis a leading company in providing high-productivity batch processing systems and services for memory, foundry... | |
ABB SAFT132CBS SAFT 132 CBS hard ware | ABBSAFT132CBS SAFT 132 CBShard ware AboutUs Cambia Automation Limited is a trade company in China. Main business have Bently Nevada , Honeywell ,... |
Same products
Specification: 0.08mm-4mm | 卖方: Changzhou Yuzisenhan Electronic Co., Ltd | Changzhou Yuzisenhan Electronic Co., Ltd. has convenient transportation in Wujin District, Changz... | |
多哥细胞冷冻容器KGSQ液氮野外罐 | 卖方: 河南天之道生物科技有限公司 | 液氮罐的使用,覆盖科研、畜牧、美食、美容、冷冻配件等行业,但主要还是用于生物样本保存。 保存生物样本可细分为两大类,动物精液和实验细胞。两种用法适用容器不同,各有特色。冻精保存,要配圆提桶使用... | |
White Fiberglass Surface, Packaging Type: Roll at | 卖方: Jiangsu Zeyusen Carbon Fiber Technology Co., Ltd. | Fiberglass surface mat is mainly used in the surface layer of fiberglass merchandise, it has th... | |
布隆迪细胞储存液氮容器 KGSQ 冷冻杜瓦瓶 | 卖方: Henan Tianzhidao Biological Technology Co., Ltd. | 液氮罐的使用,覆盖科研、畜牧、美食、美容、冷冻配件等行业,但主要还是用于生物样本保存。 保存生物样本可细分为两大类,动物精液和实验细胞。两种用法适用容器不同,各有特色。冻精保存,要配圆提桶使用... | |
3x large magnifying glass with LED - evenly illuminates viewing area | 卖方: PHONEFIX technology Co.,Ltd | RECTANGULAR SHAPES THE WAY YOU NATURALLY READ: The rectangular lens is especially design to sim... |