现场总线(Fieldbus)是连接智能现场设备和自动化系统的数字式、双向传输、多分支结构的通信网络。 传统控制系统 vs 现场总线系统: 传统4-20mA模拟系统: ┌─────┐ ────── ┌─────┐ │ PLC │────────────→│传感器│ 每个 ...
// can be found in many places. // For example on the Arduino.cc forum. // The original author is not know. // Version 2, Juni 2012, Using Arduino 1.0.1 // Adapted to be as simple as possible by ...