What is RS485?
With the help of the multipoint RS485 communication protocol, numerous devices can talk with one another on the same bus and exchange data. Long-distance data transfer is possible with the RS485 communication protocol since it employs differential signal transmission, which has the qualities of high speed, long range, and strong reliability.
What is the Modbus Protocol & how does it work?
Modbus is an industrial protocol to make communication possible between automation devices.
A master-slave relationship is used to construct the request-response protocol known as Modbus. Communication in a master-slave relationship always takes place in pairs; one device must make the request and then watch for a response; each interaction must be started by the initiating device, or master. A sensor, programmable logic controller (PLC), or programmable automation controller (PAC) is typically the slave to a human machine interface (HMI) or Supervisory Control and Data Acquisition (SCADA) system. The various protocol levels determine the content of these requests and answers as well as the network layers these communications are transmitted across.
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