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。
field buses such as PROFIBUS, which is the most widely used open field bus in the world
Line international standard, divided into FMS, DP and PA, DP communication rate can be as high as 12MB. Can (din/is011898 standard) bus
The biggest feature is its super robustness and data security. The system also supports MODBUS. The communication with intelligent field instruments is through
IART protocol or fieldbus (31.25kb profibuspa and FF Bus).
The system communication between the operation management level and the process control level is realized by the di ginets network (Industrial Ethernet /iee802.3 standard),
The user can select the communication
