Modbus是施耐德电气于1979年为使用PLC通信而发表的一种串行通信协议。 现在它已经成为工业领域通信协议的业界标准，并且是工业电子设备之间常用的连接方式。Modbus被广泛使用的原因主要有三个： Modbus通信协议作用在OSI模型的物理层（1层）、数据链路层（2层 ...

[导读] 大家好，我是逸珺，前面总结了一下RS-485的一些要点，今天来总结一下Modbus-RTU协议，原本想把实现思路也一起发出来，但是感觉太长了，就拆开了。 前世今生 照例简单说下这个协议的历时，Modicon公司于1979年制定了Modbus协议标准，并用在其PLC产品上。

Position and motion sensor specialist Posital has announced that it has expanded its range of absolute rotary encoders and inclinometers to include support the popular Modbus RTU communications ...

“Not being overcomplicated is Modbus TCP/IP’s biggest draw, not only for PLCs, but especially for PC-based applications,” said Jason Haldeman, senior product specialist for I/O and networking at ...

Research presented at this week's Black Hat conference highlights a new threat via protocol translation attacks and reveals 9 flaws found in protocol gateways from different vendors. Security ...

I have 10 different modbus rtu devices I want to query. Each is 'home run' via conduit to a central location. I have cat 5 going to each device, with a db9 serial coupling on each end. How should I ...