Capacitive industrial man-machine interface (capacitive screen) in power system applications
2020-02-07 13:08:05
The system is used for power station rectification inverter power supply control, Siemens 200PL C completes switching and analog quantity acquisition and control, leakage and battery patrol instrument collects real-time parameters of rectified inverter power supply, and the upper computer realizes control layer equipment through communication with HMI State monitoring and preservation of historical data and management of capacitive industrial man-machine interface (capacitive screen) in power system applications 1. Introduction A supporting manufacturer is a power system unit, and power requires high reliability of equipment, so the manufacturer The use of industrial products has high performance and reliability requirements. In the rectified inverter power supply control system, the upper-level electromechanical "target=_blank> machine power monitoring software uses the CDT protocol common to the power system (the power supply network microcomputer remote-cycle circulatory protocol), the patrol instrument supports the MODBUS RTU protocol, and the data to be exchanged is required. The amount is large, so that when writing HMI software, the workload is very large, especially the macro, and the background macro, initialization macro, CLOCK macro, pre/post macro, screen CYCLE macro, sub macro, etc. are used. Many types of macros are scattered in many pictures. Once developed, it is difficult to be replaced. At present, the customer has gradually started to use Delta HMI in batches, and it is very recognized for its quality. In addition, the power system is undergoing large-scale renovation. The market prospects are very bright. It is expected that in the near future, there will be many integrated application projects of Delta touch screens in more than 35,000 substations.
2, system overview
The system is used for power station rectification inverter power supply control, Siemens 200PL C completes switching and analog quantity acquisition and control, leakage and battery patrol instrument collects real-time parameters of rectified inverter power supply, and the upper computer realizes control layer equipment through communication with HMI State monitoring and historical data storage and management, Delta HMI to achieve local monitoring and the hub of this system communication. From the perspective of the architecture of the whole system, the three communication ports of Delta AE series touch screen can fully utilize the ability of three different protocols to realize the networking of this control layer device. In addition, powerful macros ensure the implementation of system functions.
Capacitive touch screen application system can be seen, the COM1 port of the touch screen is connected to the host computer by RS232 mode, and the software communication protocol of the host computer is CDT. For special protocols, the rich macro instructions of Delta touch screen can be used. COM2 port uses RS485 mode to connect multiple power inspection equipment control engineering network. All these devices support MODBUS RTU format. It is easy to establish communication program according to MODBUS format when writing communication program using macro. The COM3 port uses the RS485 method to connect to the Siemens S7-200PLC, and the baud rate uses 19200bps.
3. Screen Editor software is written according to the system prospect and architecture, and describes the connection technology of three communication ports.
3.1. Compile with Siemens S7-200 communication program (1) Create a new file. Start the Screen Editor software, create a new file, and set the settings for [Module Parameters].
HMI model and its BasePort (COM3) PLC type (2) communication settings for module parameters. In the communication settings, you need to select the communication port, communication format (in this case, 8, E, 1CONTROL ENGINEERING China copyright, 19200bps), PLC station number. The communication format should be the same as the controller to be connected. This communication with the S7-200 is established, see Figure 3.
3.2. Writing with the host computer communication macro (1) Initialization. The Initial Macro initialization macro runs once after the touch screen is powered up. This example uses an initialization macro to set the communication protocol:
(2) Set the communication protocol. INITCOM → COMPORT initialization, used to set the communication protocol:
(3) Variable2 setting. Setting of Variable2 in INITCOM (communication protocol):
among them:
·Flow Control: Flow control, when transmitting data, the new transmission processing technology such as real-time compression and debugging makes the communication speed and correctness greatly improved, but the data transmission speed between the computer and the human-machine is often much larger than The real data transfer speed between the computer and the man-machine is ensured to ensure data security and complete transfer, so there must be control of the transfer process.
1. The front panel of capacitive screen industrial tablet PC is mostly die-casted with aluminum-magnesium alloy, and the front panel reaches NEMAIP65 protection level. Rugged, durable and lightweight.
Other applications of capacitive industrial human-machine interface (capacitive screen):
2, capacitive screen industrial tablet computer is the structure of the integrated machine, the host, LCD display, touch screen integrated into one, the stability is better.
3, using the current popular touch function, can simplify the work, more convenient and faster, more humane.
4, capacitive screen industrial tablet computer is small in size, installation and maintenance is very simple.
5. Most industrial tablet PCs adopt fanless design and use large-area finned aluminum block to dissipate heat, which consumes less power and has less noise.
6, beautiful appearance, wide range of applications.
The capacitive screen industrial tablet computer is a touch screen commonly mentioned in the industry. The performance of the whole machine is perfect, and it has the performance of the common commercial computer in the market. The difference lies in the internal hardware. Most industrial products are industrial motherboards. The difference between them and commercial motherboards is that they are not mass-produced, and the product models are relatively stable. The industrial requirements are relatively simple and single, and the performance requirements are not high, but the stability is particularly good. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
2, system overview
The system is used for power station rectification inverter power supply control, Siemens 200PL C completes switching and analog quantity acquisition and control, leakage and battery patrol instrument collects real-time parameters of rectified inverter power supply, and the upper computer realizes control layer equipment through communication with HMI State monitoring and historical data storage and management, Delta HMI to achieve local monitoring and the hub of this system communication. From the perspective of the architecture of the whole system, the three communication ports of Delta AE series touch screen can fully utilize the ability of three different protocols to realize the networking of this control layer device. In addition, powerful macros ensure the implementation of system functions.
Capacitive touch screen application system can be seen, the COM1 port of the touch screen is connected to the host computer by RS232 mode, and the software communication protocol of the host computer is CDT. For special protocols, the rich macro instructions of Delta touch screen can be used. COM2 port uses RS485 mode to connect multiple power inspection equipment control engineering network. All these devices support MODBUS RTU format. It is easy to establish communication program according to MODBUS format when writing communication program using macro. The COM3 port uses the RS485 method to connect to the Siemens S7-200PLC, and the baud rate uses 19200bps.
3. Screen Editor software is written according to the system prospect and architecture, and describes the connection technology of three communication ports.
3.1. Compile with Siemens S7-200 communication program (1) Create a new file. Start the Screen Editor software, create a new file, and set the settings for [Module Parameters].
HMI model and its BasePort (COM3) PLC type (2) communication settings for module parameters. In the communication settings, you need to select the communication port, communication format (in this case, 8, E, 1CONTROL ENGINEERING China copyright, 19200bps), PLC station number. The communication format should be the same as the controller to be connected. This communication with the S7-200 is established, see Figure 3.
3.2. Writing with the host computer communication macro (1) Initialization. The Initial Macro initialization macro runs once after the touch screen is powered up. This example uses an initialization macro to set the communication protocol:
(2) Set the communication protocol. INITCOM → COMPORT initialization, used to set the communication protocol:
(3) Variable2 setting. Setting of Variable2 in INITCOM (communication protocol):
among them:
·Flow Control: Flow control, when transmitting data, the new transmission processing technology such as real-time compression and debugging makes the communication speed and correctness greatly improved, but the data transmission speed between the computer and the human-machine is often much larger than The real data transfer speed between the computer and the man-machine is ensured to ensure data security and complete transfer, so there must be control of the transfer process.
1. The front panel of capacitive screen industrial tablet PC is mostly die-casted with aluminum-magnesium alloy, and the front panel reaches NEMAIP65 protection level. Rugged, durable and lightweight.
Other applications of capacitive industrial human-machine interface (capacitive screen):
2, capacitive screen industrial tablet computer is the structure of the integrated machine, the host, LCD display, touch screen integrated into one, the stability is better.
3, using the current popular touch function, can simplify the work, more convenient and faster, more humane.
4, capacitive screen industrial tablet computer is small in size, installation and maintenance is very simple.
5. Most industrial tablet PCs adopt fanless design and use large-area finned aluminum block to dissipate heat, which consumes less power and has less noise.
6, beautiful appearance, wide range of applications.
The capacitive screen industrial tablet computer is a touch screen commonly mentioned in the industry. The performance of the whole machine is perfect, and it has the performance of the common commercial computer in the market. The difference lies in the internal hardware. Most industrial products are industrial motherboards. The difference between them and commercial motherboards is that they are not mass-produced, and the product models are relatively stable. The industrial requirements are relatively simple and single, and the performance requirements are not high, but the stability is particularly good. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Frangipani oil has a strong, rich, heady and exotic fragrance that makes it valuable in perfumery. Also its deep and long-lasting fragrance and deep cleaning properties that make it useful for skin creams, soap and lotions.
The oil is either clear or pale yellow and is slightly viscous. Frangipani is also known as plumeria.
Frangipani Essential Oil,Natural Frangipani Essential Oil,Pure Frangipani Essential Oil,Organic Frangipani Essential Oil
Xinhui Gangzhou Flavors&Fragrance Co.,Ltd , https://www.xhgzff.com