Fading Coder

Modbus is a serial communication protocol developed by Modicon (now Schneider Electric) in 1979 for programmable logic controllers (PLCs). Due to its simplicity and reliability, it has become a de facto standard in industrial automation. Protocol Overview Modbus operates on a master-slave architectu...

1. Hardware Overview Sensor: 12 VDC industrial sensor with RS‑485 interface, Modbus RTU protocol Interface design: RS‑485 is half‑duplex; the transceiver must switch between transmit and recieve Direction control can be automated with a hardware auto‑TX enable circuit triggered by the UART TXD start...