IS220PPRFH1B
IS220PPRFH1B
IS220PPRFH1B
为了以图形形式处理数据，WinCC 使用了在线趋势控件，从而用户可以选择将数据显示为趋势。 可随意组态趋势显示。 趋势可显示当前正在进入的值和已归档的值。
下列要求适用于在 WinCC 在线趋势控件中显示趋势：
● 在 WinCC 在线趋势控件中，可在一个或多个趋势窗口中显示任意数目的趋势。 建议最多显示 8 个趋势。
● 如要将变量显示成其它变量的函数，请使用 WinCC 函数趋势控件。
optical fiber cable and mixed media) and network topology can be selected for the system bus
Due to the adoption of tcp/ip protocol, the system can also realize ultra long distance communication with the help of public telephone network (dial-up mode) or satellite.
PLC and other subsystems communicate with industrial “system through Modbus protocol interface. The system also supports iec870-5 over control coordination
Discussion.
The flash EPROM inside PS provides more than 220 function modules (control algorithm subroutines), in addition to the base specified in IEC 61131 3 standard
In addition to this content, many powerful and strictly tested function blocks from practical engineering
applications are also expanded. Any complex control
All schemes can be realized by the combination of these function blocks.
The function blocks provided by the system mainly fall into the following categories:
o
Analog quantity processing
o
Digital quantity processing
Loop adjustment
Logical sequence control
c
Logical operation
Monitoring function
Acquisition function
c
Arithmetic operation
c
Tcp/ip protocol communication interface
Modbus protocol communication interface
1ec870-5 protocol communication interface (telecontrol)
4.2 field controller PS
Industrial ial “field controller PS is a special process control station, which is embedded with a fieldbus communication interface for users to use
Fieldbus technology provides a very flexible choice. Each PS is allowed to insert 4 fieldbus interface cards (card types can be different),
Each card is connected to a fieldbus to collect process data and diagnostic
