The application of switch module in industrial control system
In industrial control, there are many sensors that read the parameters of the field environment and the various parameters of the equipment in digital form. However, the original sensors are all independent of each other, resulting in the inability to perform unified management.
With the development of industrial automation, higher requirements are placed on the management of industrial controls.
1. Industrial control equipment is more and more sophisticated, more and more sensitive to the external environment, requires external environmental parameters, such as temperature, humidity must be controlled in a smaller range, thus requiring the temperature and humidity sensor data must be relevant in real time Digital parameters are transmitted to the control center to facilitate the control center to make timely adjustments.
2. As more and more devices are used in industrial control, the probability of failure increases, and once a device fails, the entire production process may be interrupted. Therefore, it is required that the real-time operation of the device can be transmitted to the monitoring center to facilitate the timely detection of abnormal conditions.
3. The process in industrial control is becoming more and more complicated. In the production process, certain links need to be adjusted. This requires the collection of digital parameters of related equipment and the transfer of relevant digital parameters from the monitoring center. relative devices.
The factory uses digital input and output modules from Shenzhen Tiandi Huajie Technology Co., Ltd. to transmit digital signals from various sensors throughout the factory to the monitoring center. The digital input/output module provides 8 channels of digital input to collect the switch signal of the sensor to the monitoring center. The 4 channels of digital output can transmit the control command of the monitoring center to the following devices as digital signals. Because it uses the 485 bus as the communication line, it ensures the communication distance (the 485 bus can transmit 1200 meters, if you use 485 repeater or 485 hub can extend the transmission distance). Because the 485 bus supports the point-to-multipoint communication method, the entire system can be easily expanded to ensure that the entire system can be easily expanded.