Intelligent control system description
The intelligent control system can centrally control the intermediate frequency heating equipment and mechanical devices. It is placed on the production site and is beneficial to control the entire process of the heating process. On this basis, it is equipped with a temperature measuring device and a PLC programming module , which can realize the power control of the intermediate frequency power supply according to the melt temperature.
I. Intelligent control of IF power supply:
The panel of the power cabinet is equipped with an intermediate frequency voltmeter, a power adjustment button and water pressure and total fault alarm indicators. Realize the control of starting, adjusting power and shutting down the IF power supply. It can display the main operating parameters of IF and IF power supply. At the same time, the short-circuit, overload, over-voltage, over-temperature, phase loss, and over-frequency protection faults that occur during the heating process can be displayed.
Monitoring of temperature:
A contact temperature display instrument is installed on the operation panel. With sound and light alarm indicator.
nAutomatic control component composition:
All control units are controlled by PLC controller.
Collect, record and store the data of process control in real time and have corresponding classification retrieval, query and printing functions.
Real-time detection of process control effect; during the operation of the equipment, the follow-up status of the diagnostic equipment is analyzed and monitored in real time, prompts are displayed in Chinese characters for various abnormal conditions, and sound and light alarms are issued.
Touch screen: a touch screen for setting each part of the operating parameters, it is possible to control the mode of operation, the induced current parameters, an induced current parameters, or parameters such as cooling water systems.
PLC control system: PLC adopts S7-300 system products from Siemens, Germany, which is used to control various actions of the production line.
Second, PID temperature closed-loop intelligent control
Adopt international advanced PID temperature closed-loop control system, temperature measurement, temperature accuracy ± 25 ℃.
Working process of automatic control system
control mode selection:
The control mode of the equipment is divided into "automatic" and "manual control". The switching of the two working modes is selected by the working mode selection switch on the console. By default, the system is set to the "manual control" position.
PID temperature closed-loop control:
After the system enters the selection of "automatic" control mode, it will automatically enter the self-controlling man-machine interface. After entering this interface, you can enter the corresponding production data (required melt temperature ). The input of production data can be directly entered in the data frame of the interface. After the data is input, you can click the automatic control start button; after entering the automatic control state,
Third, the PLC melting management system and monitoring system can have the following functions:
The smelting workshop control and management system is a PLC-based technology. Songdao takes the functions of the SD Smelting management system2018 control system one step forward. The system is designed around Industrial Ethernet. With this tool, electric furnace operators can accurately control and monitor the entire melting process from charging to smelting to tapping. In addition to the use of embedded microprocessor control, the smelting plant control and management system provides operators with smelting control modes and diagnostics, analyzes and supports all the functions of the control system, and also has the following advantages: direct access to system data: for the smelting plant supervisor Provide managers and managers with the data needed to monitor, evaluate and plan operations in the smelter.
Fourth, automatic melting control system with weighing
Melting control management system: The temperature-based control system can calculate to the specified temperature and then use the insulation power to reduce energy consumption and avoid overheating. The control system also provides automatic sintering and cold start functions.
The automatic smelting control system with weighing can accurately and reliably weigh the weight of molten iron, and can store and recall the melting characteristic curves of different materials. You can set the temperature you want to melt. The melting management system can calculate the amount of electricity required to reach the target temperature based on the target temperature and the weight of the charge. Mass system can automatically most optimal ratio of power output to melt.
Simple and easy to use: This system has a simple and easy to use intuitive screen and excellent industrial hardware, which is very easy to master and maintain. Graphical display of operating data helps to understand this information more clearly and easily.
1) Perfect melting control management function, automatic fault diagnosis, automatic furnace sintering and other functions.
2) Perfect melting process control function and perfect monitoring, alarm and fault self-diagnosis function. With perfect sound and light alarm. It will alarm the following conditions and feedback various faults.
■ Power supply cooling water temperature is too high
■ Power supply cooling water pressure is too low
■ The furnace cooling water temperature is too high
■ The furnace cooling water pressure is too low
■ No DC output for rectifier part of variable frequency power supply
3) In addition to the protection system, the PLC melting management system sets the following limit display
■ Inverter work
■ Full power limit
■ Capacitor voltage limit
■ Induction coil voltage limit
■ Output current limit
■ Frequency limit
■ Grid input current limit
4) PLC melting management system requires perfect melting and heat preservation process control. Its main functions include
■ Continuously monitor and display various parameters
■ Display system operating status
■ Automatic sintering furnace lining
■ cold furnace start
5) Monitoring software system functions
The on-site industrial control touch screen can display each process data and parameter through each process screen. The control software uses a real-time exchange method to send the data address to be queried to the processor through the communication network, and the data is reflected in the screen in time.
System operators can easily control equipment by operating workstations:
★ Start the device
★ Turn off the device
★ Emergency shutdown
★ Alarm reset