One of the more widespread standards is ModBus, an open protocol using a master-slave architecture, usually delivered over RS-485 serial. It’s readily found being used with PLCs, HMIs ...

The Modbus protocol supports multiple physical layers and transmission ... automation and process control to smart building and energy management systems. Examples include: ...

Among the benefits of combining an Ethernet physical infrastructure with the universal TCP/IP networking protocol and the vendor-neutral Modbus data structure are simplicity and lower costs in both ...

Schneider Electric recently transferred is copyright of the Modbus protocol to Modbus-IDA, a nonprofit organization formed in 2002 to advance industrial communications. Modbus protocol was originally ...