ModBus Protocol and Deep Dive
ModBus Protocol and Deep Dive How it Work : The Protocol Modbus transmits the signals over Serial Lines between two devices.We can even connect two devices using single serial cable using serial port in a master slave configuration to make the setup. Where data will be send in the form of Zeros and Ones what we called Bits which is nothing but the voltage difference between 5V to -5V. These bits are send with the baud rate of 9600. Which Mode to Select : ASCII mode : The answer to this question is depends on the Application we have, we can understand this with the help of this explanation.If we select the ASCII mode then data will send in the form of Eight-bit (Byte) in a message as a two ASCII characters. Modbus ASCII is a serial protocol which runs on RS-232 and RS-485 physical layer. All slaves devices are polled on demand by the master devices and there is only one master. The format of the message frame can be up to 252 bytes in length, and up to 247 addresses are po...