PLC fully automated production line

1. System advancement and reliability
The main equipment integrated in this system all adopts international famous brand products that meet international standards, have mature technology, and have successful application precedents in many industries at home and abroad. The field station adopts the famous SIEMENS company's S7-400 PLC system. The central station adopts DELL computer (Optiplex series) and is equipped with a 24" large screen color display.

2. System compatibility and scalability
The establishment of this system follows the principle of openness, adopts a structured system, and has complete compatibility and scalability for future development. It adopts a standard Ethernet structure, has good scalability and openness, and any device that complies with the Ethernet protocol can access the Internet, and can be easily plugged into the production scheduling management system (MIS system). If a similar production line is expanded, only 70% of the cost will be increased. If it is to be converted to a larger production scale, the current system can be transplanted and used without increasing the cost.

3. Simplicity and economy of the system
This DCS system adopts the SIEMENS PCS7-400 system with relatively good performance and price, high reliability, small maintenance workload, and modular structure, which is easy to replace and does not affect the continuity of production.

4. Features of the application software
The application software of this system can fully meet the requirements of process control of technological production, ensure the safe and reliable operation of the entire production line, fully improve the equipment operation rate, and use mature programming skills according to the production process control requirements of the project to make reasonable and full use of the hardware resources of this system.

The operating interface of the system application software is very good. In addition to the conventional functions, characteristics and bidding requirements of general DCS systems, it also has the following unique features:

The system interface is fully localized in Chinese, including various display screens, alarms, records and production reports, and has Chinese operating prompts and help.
It can be operated completely without the keyboard by using a mouse. The operation is simple, convenient, reliable and easy to master, and does not require the operator to have a high level of education.
The device table query function allows you to view the files and operating status of any device at any time on the operation interface

Failures and problems, how to identify problems and clarify responsibilities. The DCS system has detailed records of all equipment failures and operation processes. The records cannot be changed and have a four-level authority password protection function.

It is easy to connect with the production scheduling management system (MIS system), and prepares a large amount of necessary data for the MIS system for high-level management and decision-making. The economy of the system is a good performance-price ratio based on the above principles. In recent years, with the rapid development of computer technology, the control ability of the PLC system has been greatly increased, and its hardware and software resources have been fully utilized, with a good performance-price ratio.

1 The system completes the monitoring, management and control of the main production process of the entire production line.
2 In the central control room, you can monitor the production process, real-time dynamic parameters of each measuring point, the operating status of each device, important parameters, display the system overview, operation panel, real-time trend and historical trend charts, and real-time operation functions.
3. It can provide multiple alarm processing functions and can save alarm information for a long time. The alarm information can explain the detailed process such as when the alarm occurred, what the reason was, when it was processed, when the processing was completed, etc., and record them in sequence, which can be printed automatically or ordered to be printed at any time.
4 The system software can realize the self-diagnosis function of the central operation station, engineer station, network bus, auxiliary equipment and all I/O cards. The operation stations are hot standby for each other, and the engineer station can also be used as an operation station. The failure of any central operation station will not affect the operation of the system. The failure of any device or module in the system will not affect the operation of the entire system.
5 The operation station is mainly responsible for production monitoring, production information management, alarm information processing, recording and printing. The field station completes field I/O data acquisition, loop control, sequential interlocking control, and collects necessary data for monitoring and management.
6 The data communication network of the system is an open bus Ethernet with a communication rate of 100MB and a redundant network. It has fast communication speed, high reliability and is easy to expand. It can easily collect data from the automatic control system designed by the foreign party without affecting the normal operation of the automatic control system designed by the foreign party.
7 The database can be maintained online during system operation (with password authorization), and online programming and program modification can be performed without affecting the system's functions.
8 The system can realize automatic control of the regulation loop.
9. All system controls have conditional checks and are equipped with hardware and software error prevention measures. Various input and output parameters are automatically checked within the range, and output control is prohibited if the range is exceeded. It is also equipped with a four-level password protection function to prevent abnormal operation and error operation.