Highlights

Tasks performed by the PLC include:

• Monitoring of the operation and connection of different machine parts
• Control of the machine functions
• Processing of signals and events
• Evaluation of operating states (e.g. fiber break)
• Monitoring and control of stretching.

Область применения

Ring spinning is the most popular method of manufacturing high-quality yarns. Complete production lines for finished yarns are produced by placing a flyer in front of the spinning machine and a winder behind it. The large number of signals and operating states to be processed require a high-performance control system with real-time capability even at high production rates.

The main task in the ring spinning process is to monitor and control the spinning positions on the machine. Because of the type of process used, these spinning positions, which can number up to several hundred, have to be monitored and controlled individually. At the same time, cost considerations necessitate the use of a single, centralized controller.

The compact SIMATIC S7-300 PLC, with its large range of system components and expansion options, is ideal for use as a high-performance centralized controller.

Дизайн

Monitoring and control of the cop size is handled by the FM 350-2 counter module, which receives its information from the sensors on the machine.

Operation and display of operating states and recipe management for the machine are performed centrally on a graphical SIMATIC OP27 operator panel, which is connected to the SIMATIC S7-300 system over the internal SIMATIC MPI bus.

Also integrated in the SIMATIC S7-300 is an interface module for the communication network, which is based on the PROFIBUS DP protocol. The PROFIBUS DP bus connects the automation components, such as the drive controller, PLC and display unit, handles communication with the control room and other parts of the machine such as the flyer or winder, and interacts with the transport system and the doffer.

A 1LA7 variable-speed asynchronous motor is used to drive the complete machine. Power is fed to the drive from a vector-controlled SIMOVERT MICROMASTER converter.