Modbus is a serial communication protocol invented by Modicon for the communication between its PLC and the host. Its physical layer adopts asynchronous serial standards such as RS232 and 485. Due to its openness, it is widely adopted by PLC and RTU manufacturers. The Modbus communication method adopts a master-slave query corresponding mechanism. Only when the master station sends a…
Month: May 2024
Converting 0-10VDC to 4-20mA for Robust Signal Transmission in Water Supply Systems
In variable frequency water supply control systems, remote pressure gauges play a crucial role in monitoring and maintaining consistent pressure levels. These gauges often exhibit resistance values ranging from 100 to 500 ohms, which correspond to a continuous pressure range, such as 0-10 MPa. Traditionally, this variable resistance can be utilized by series connecting a larger resistor and applying a…