I. Overview

Touch screen（touch screen）Also known as“touch screen”、“touch panel”It is an inductive liquid crystal display device that can receive input signals such as contacts. When the graphic buttons on the screen are touched, the tactile feedback system on the screen drives various connection devices according to pre programmed programs, which can replace mechanical button panels and create dynamic audio-visual effects through the liquid crystal display screen. As a new type of computer input device, touch screen is currently a simple, convenient, and natural way of human-computer interaction.

The distributed control system is a new generation of instrument control system based on microprocessors, adopting the design principles of decentralized control functions, centralized display operations, balancing autonomy and comprehensive coordination. It is a multi-level computer system composed of process control level and process monitoring level, linked by a communication network, which integrates computers（Computer）Communication（Communication）Display（CRT）And control（Control）Wait, wait4CThe basic idea of technology is decentralized control, centralized operation, hierarchical management, flexible configuration, and convenient configuration.

Overview of the main technologies of the system

The system mainly consists of on-site control station (I/O station), data communication system, human-machine interface unit (operator station OPS, engineer station ENS), cabinet, power supply, etc. The system has an open architecture and can provide multiple layers of open data interfaces.

Hardware systems have high reliability, easy maintenance, and advanced technology in harsh industrial environments. The underlying Chinese software platform has powerful processing capabilities and provides the ability to easily configure complex control systems, as well as support for users to independently develop control algorithms; Easy to configure and use.

The utilization rate of the entire system is at least 99.9%; The average system time is 100000 hours, achieving complete monitoring in many fields such as nuclear power, thermal power, thermoelectric, petrochemical, chemical, metallurgical, and building materials.

“The concept of 'domain'. Divide a large control system into several relatively independent subsystems using high-speed real-time redundant networks. Each subsystem forms a domain, and each domain shares management and operational data. Each domain is a fully functional DCS system to better meet user needs.

The network structure is reliable, open and progressiveness. At the system operation layer, redundant 100Mbps Ethernet is used; At the control layer, redundant 100Mbps industrial Ethernet is used to ensure the reliability of the system; At the on-site signal processing layer, a 12Mbps PROFIBUS bus connects the central control unit and various on-site signal processing modules.

Standard Client/Server architecture. Some DCS operating layers adopt a Client/Server structure

An open and reliable operating system. The operating layer of the system adopts the WINDOWS NT operating system; The control station adopts a mature embedded real-time multitasking operating system QNS to ensure the real-time, security, and reliability of the control system.

Standard control configuration software. The system adopts the control configuration tool of IEC61131-3 standard, which can achieve any monitoring and control requirements.

Scalability and scalability ensure cost-effectiveness.

Application scope:

This instrument has wireless acquisition capability2The fire liquid level monitoring equipment displays the height of the monitoring instrument in the central control room and can alarm through font color. You can directly modify alarms and other functions through the touch screen.

2、 Main technical indicators

（1）Human machine interface parameters（7Inch)

（2）Basic error:0.2％FS

3、 System diagram of human-machine connection acquisition module:

4、 Screen display:

image1Display Screen

image2Alarm Setting Screen

5、 Warranty

If the module of our company is a manufacturing quality problem caused by the factory, it will be repaired free of charge by the factory from the date of instrument delivery. If the damage is caused by improper storage and use, a cost fee will be charged for the repair. The warranty period is 18 months, and the warranty period of 3-5 years must be specified separately.