How to design a PLC simulation technology laboratory in colleges and universities?

1 Introduction

The use of virtual and simulation technology is a practical way to improve the utilization efficiency of college laboratories and reduce experimental maintenance costs. Introduce the more mature simulation and virtual technology; in view of the status quo of industrial automation laboratories in some colleges and universities, combined with the current development of virtual instrument and simulation technology, the establishment of industrial automation laboratories in colleges and universities is discussed. The use of virtual instrument technology in experiments can enhance students' enthusiasm, interest, and flexibility of experiments, while greatly reducing costs. Nowadays, virtual simulation technology used in industrial control experiments has become a major trend.

This solution is aimed at the field of industrial automation, providing virtual simulation of instrumentation and equipment, industrial automation objects, controller (especially PLC) simulation, and factory simulation. It integrates semi-physical simulation technology, visual simulation technology, virtual instrument technology, digital modeling, information acquisition technology, communication technology, control technology, and computer technology to build a complete industrial automation test and verification system, and build the laboratory into a learning automation technology, A public technology platform to verify theories.

This program is aimed at undergraduates, including industrial instrumentation, PLC simulation, and factory simulation; including Labview virtual instrument, Mathlab mathematical modeling, and advanced complex control. The virtual simulation laboratory may include more content, and we are constantly improving our products and expanding the scope of virtual simulation applications.

How to design a PLC simulation technology laboratory in colleges and universities?

2. Application technology virtual simulation training program

Applied technology education includes part of engineering education and vocational education. We provide two categories of products: manufacturing automation and process automation. In addition to pure virtual simulation products, it also provides semi-physical simulation products. The setup also hopes that the school will add corresponding real equipment so that short-term training can be conducted on real equipment after a large number of simulation trainings.

2.1 Virtual simulation manufacturing automation

Manufacturing automation sensors and equipment, manufacturing automation unit virtual simulation, PLC controller simulation, assembly line, filling line simulation, there are four parts.

(1) Sensors and equipment, introducing the principle, three-dimensional structure and wiring of proximity sensors, encoders, speed sensors, color code sensors, machine vision sensors, etc.; also includes solenoid valves, pneumatics, and hydraulic mechanisms. Equipment includes AC motors, stepper motors, servo motors, etc. For the electrical part, it also includes three-dimensional animation and wiring training for indicator lights, air switches, knobs, relays and contactors.

(2) The unit of manufacturing automation, including the structure, principle and control of various single equipment, such as feeder, assembly unit, processing unit, sorting unit, manipulator and other units. Contains electric, pneumatic and hydraulic units. Through a large number of three-dimensional interactive animation technology, assembly and wiring training and assessment are realized.

(3) The simulation of PLC controller, including the simulation of Siemens S7-200, S7-300/400, and the simulation of common Omron and Mitsubishi PLC. Through software technology, programming, downloading, debugging, as well as object control, configuration monitoring and other training can be realized.

(4) The assembly line or filling line simulation is a factory simulation that integrates various sensors and equipment, multiple flexible units, and PLC controllers to form a factory-level simulation. Students can perform programming, joint debugging, and multi-person cooperative development and debugging.

Large-scale factory simulation can realize state preservation and loading, assessment and replay, and can be used for training and assessment of operators and technicians.

2.2 Semi-physical simulation manufacturing automation

The objects of this product are all realized by simulation, but the PLC is real, so that programming and debugging can be carried out more realistically. And can realize high-speed counting, high-speed PWM, PTO control. We provide modules that can accept PLC low-speed or high-speed control, communicate with PCs, and realize the simulation of expensive target devices on the PC. It also includes assembly and wiring training and assessment.

2.3 Central control room of manufacturing plant

Provide 2*3 splicing large-screen monitoring wall for video and key parameter monitoring of large-scale production lines. Provide factory information network. On-site information release screen (send processing requirements and drawings to the site), on-site RFID recognizer, and card writer.

Provide monitoring configuration interface for remote operation.

A large number of surveillance cameras are provided, which can record students' operations or monitor the scene. Virtual video scenes can also be provided.

Provide MES system to realize the integration of management and control.

2.4 Process automation

Process automation sensors and equipment, process automation object unit virtual simulation, PLC, DCS controller simulation, process automation factory simulation, a total of four parts.

(1) Sensors and equipment, introduce the principle, three-dimensional structure and wiring of temperature, pressure, liquid level, flow, composition and level sensors; also include solenoid valves, regulating valves, frequency converters and other actuators. The equipment includes water pumps, heat exchangers, heaters, etc. For the electrical part, it also includes three-dimensional animation and wiring training for indicator lights, air switches, knobs, relays and contactors.

(2) The unit of process automation, including the structure, principle, and control of boiler, water tank volume system, pump valve unit, heat exchange unit, etc. Through a large number of three-dimensional interactive animation technology, assembly and wiring training and assessment are realized.

(3) The simulation of PLC controller, including the simulation of Siemens S7-200, S7-300/400, and the simulation of common Omron and Mitsubishi PLC. Through software technology, programming, downloading, debugging, as well as object control, configuration monitoring and other training can be realized. And trained PLC PPI, USS, MODBUS and other communications. Multi-PLC networking, as well as networking with inverters and touch screens.

(4) Comprehensive process automation factory simulation, integrating various sensors and equipment, multiple flexible units, and PLC controllers to form a factory-level simulation. Students can perform programming, joint debugging, and multi-person cooperative development and debugging. For example, A4200 integrated factory simulation, E3000 sewage treatment plant simulation. Large-scale factory simulation can realize state preservation and loading, assessment and replay, and can be used for training and assessment of operators and technicians.

2.5 Semi-physical simulation process automation

The semi-physical simulation of process automation includes two kinds: one is that all the objects are realized by simulation, but the PLC is real, so that programming and debugging can be carried out more realistically. The other is that the object also has a frame, management, valves, and sensors, which are exactly the same as the analog system, but without water vapor, all detection signals are simulated by PC and sent to the sensor. Then send it to the real PLC.

Products also include assembly, wiring, and calibration training and assessment. You can also perform startup, shutdown, fault operations and assessments.

2.6 Process plant central control room

Provide 2*3 splicing large-screen monitoring wall for video and key parameter monitoring of process plants.

Provide monitoring configuration interface for remote operation.

Provide factory information network.

Provide a large number of surveillance cameras to monitor the scene. Virtual video scenes can also be provided.

Provide MIS/MES system to realize the integration of management and control.

3 Recommended virtual simulation product configuration

Meet 60 computer laboratories to achieve large-scale simulation.

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