Onilne Monitoring Of The Main Mine Fan On The Basis Of PLC

Mine main fan main role is to exclude the harmful, poisonous gas and dust, conveying a fresh air to ensure mine and worker health and safety, so it is safe, reliable operation is necessary to guarantee the normal production of coal mines the work. As a result of mine main ventilation machine in dirty air continuously, so the failure probability is larger, and the traditional main ventilator long-term at full power controlmode, and is influenced by many subjective factors, such aspoor reliability, energy-consuming and complicated to operate, disadvantages, so need to research a safe and reliable, energy efficient, low noise, intelligent monitoring system.In this paper, the traditional main fan control system, the main PLC applications in the main fan control system, and conducted in-depth research and design.(1) Controller system with S7-the300PLC Control System, hardware, security, user-friendly software, easy to learn, to facilitate debugging and maintenance. Acquisition through a combination of PLC and a variety of sensors, the various signals of the ventilator, and transferred to the host computer for display. Reduce the traditional relay mechanical contact point control method for fixing shortcomings, which greatly improves the system flexibility, reliability.(2) Of the main mine fan speed adjustment using the most advanced frequency control scheme. It uses a working environment for vector control technology with the main mine fan, just the frequency of the inverter parameter settings in the console, you can quickly adjust the wind speed.(3) In order to improve system security, monitoring the various parameters of the ventilator. Fan monitoring system by the IPC or the touch screen and WinCC. WinCC interface alarm signals, data processing, generate the form, print.(4) In the design, the software using Siemens STEP7programming software and WinCC configuration software. STEP7realization of PLC programming, configuration, applications written through the PLC ladder language to achieve a variety of control, WinCC in the upper man-machine interface program, you can easily program with a variety of software and user together, to meet the actual needs.