Modbusin

Modbusin is a term that appears to be a misspelling or a non-standard variation related to Modbus. Modbus is a widely used serial communication protocol, originally developed by Modicon (now Schneider Electric) in 1979. It is a master-slave protocol used for transmitting information over serial lines between electronic devices. The protocol is open and royalty-free, making it popular in industrial automation and control systems.

There are two primary variations of Modbus: Modbus RTU and Modbus ASCII. Modbus RTU is the more common binary representation, while Modbus ASCII uses printable ASCII characters. Both operate over serial communication lines, typically RS-232, RS-422, or RS-485. Modbus TCP/IP is another variant that allows Modbus communication over Ethernet networks.

The protocol defines a message structure, including function codes that specify the operation to be performed (e.g., reading coils, holding registers) and data addresses. Modbus is known for its simplicity and robustness, which has contributed to its widespread adoption across various industrial applications, including programmable logic controllers (PLCs), sensors, and human-machine interfaces (HMIs). If "Modbusin" refers to a specific implementation or a related technology, further context would be needed for a precise definition.