1. Introduction
TP Contact Industrial Graphic Displayer (referred to as contact screen) is a human-machine interface (known as HMI or MMI in foreign countries) that connects humans and machines (mainly PLC), which is known as the face of PLC. It is an intelligent operation display that replaces the traditional control panel and keyboard. It can be used for parameter setting, data display, depicting the automatic control process in the form of curves, animations, etc., and can simplify the control program of the PLC. Compared with the advantages of imitating instruments and console control:
1) The volume becomes smaller, and it does not take up space;
2) Simplified connection.
2. The main role of TP contact screen
Supervision: Reflect the internal status of the PLC in various forms such as data, curves, graphics, animations, etc., store the values, and then intuitively reflect the process and direction of the industrial control system.
Operation: The internal bit status of the PLC can be changed through contact operation, the memory value, and then participate in the process control.
3. The main functions of TP contact screen
1) Perform the control process in the form of animation, complete the working condition diagram and flow chart, and the equipment will be displayed from static to operational, and the picture will imitate the animation;
2) ON/OFF indication of discrete points; It can complete the color change of pipes, valves, and indicator lights, the opening and closing of electrical switch switches, the opening and closing of baffle switches, and the completion of multiple switches.
3) Parameter setting, data display; Data tables can be designed, and simulation images of manufacturing operation panels can be manufactured;
4) bar chart, (semi) pie chart, container chart, trend chart and various instrument displays; It can manufacture the simulation image of the operation panel, and complete the change of signal value and liquid depth; mimic the movement of the header pointer or cursor, etc.;
5) Various alarm actions: if there is an abnormal situation in the production process, take the initiative to alarm and display the type of fault with text, and the screen will actively switch to the process screen of the fault location at the same time;
6) can be used for report printing (non-screen hard copy), alarm information printing, printing timing can be confirmed by the user; It can be connected to CCTV supervision head (NTSC standard) to display real-time information on site.
7) Move the original switch and indicator light to the contact screen, which can save the input and output points corresponding to the switch and indicator light on the PLC, and then reduce the planning of the PLC system.
8) Authority: The operator can only enter the operation status after entering the correct login password when turning on the machine
4. Characteristics of TP contact screen under harsh conditions:
1) Dustproof and earthquake-resistant
2) Waterproof and anti-electromagnetic
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