PS内部的Flash EPROM 提供220多种功能模块(控制算法子程序)，除IEC 61131 3标准规定的基
本内容外，还扩充了许多来自于实际工程应用、且功能强大并经过严格测试的功能块。任何复杂控制
方案均可由这些功能块组合实现。
系统提供的功能块主要有以下几大类:
o
模拟量处理
o
数字量处理
回路调节
逻辑顺序控制
c
逻辑运算
监视功能
采集功能.
c
算术运算
c
TCP/IP协议通讯接口
Modbus协议通讯接口
1EC870-5协议通讯接口(Telecontrol)
4.2现场控制器 PS
Industr ial”现场控制器PS是- -种特殊的过程控制站，它内嵌了现场总线通讯接口，为用户使用
现场总线技术提供了很灵活的选择。
data exchange between different systems.
can. The process control stage realizes various loop adjustments including complex control (various PID, ratio, Simith, etc.) and high-speed logic control.
Control, sequence control and batch intermittent control functions.
The internal communication of the process control station (between the controller and various intelligent devices such as I/0 or field instruments) adopts the international standard field controller.
Wire. The field controller supports various field buses such as Profibus. Profibus is the most widely used open field bus in the world.
Line international standard, divided into FMS, DP ztechnical upgrades
