6K8 1037302
6K8 1037302
6K8 1037302
2010年3月西门子Indusdry Solution IT部门更新了基于S7-300/400系统CPU的集成PN口的Modbus/TCP的最新版本软件选项包“MobusTCP PN-CPU V2.4”，本文主要介绍了通过S7-300/400 CPU的集成PN接口进行Modbus TCP的通讯原理，并以Modscan32和Modbus slave软件为例模拟第三方设备详细介绍如何配置与CPU的集成PN接口进行Modus TCP通讯，希望通过本文档，能够给读者S7-300/400 CPU集成PN口的Modbus TCP通讯入门指导。
MODBUS/TCP是简单的、中立厂商的用于管理和控制自动化设备的MODBUS系列通讯协议的派生产品，显而易见，它覆盖了使用TCP/IP协议的“Intranet”和“Internet”环境中MODBUS报文的用途。协议的最通用用途是为诸如PLC’s，I/O模块，以及连接其它简单域总线或I/O模块的网关服务的．
MODBUS/TCP使MODBUS_RTU协议运行于以太网，MODBUS TCP使用TCP/IP和以太网在站点间传送MODBUS报文，MODBUS TCP结合了以太网物理网络和网络标准TCP/IP以及以MODBUS作为应用协议标准的数据表示方法。MODBUS TCP通信报文被封装于以太网TCP/IP数据包中。与传统的串口方式，MODBUS TCP插入一个标准的MODBUS报文到TCP报文中，不再带有数据校验和地址
following categories:
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Analog quantity processing
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Digital quantity processing
Loop adjustment
Logical sequence control
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Logical operation
Monitoring function
Acquisition function
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Arithmetic operation
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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 information from the bus. The interface card is easy to replace and plug and play
(plug & play) and can be plugged in and out with power.
The field controller PS has the following features:
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Flexible: it supports all international standard open fieldbus and can be mixed
4 high-speed fieldbuses can be connected at the same time (max. 12 MBD)
Simple project: only use the same tool CBF (control build f) software for configuration, debugging and diagnosis
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Access to all information from the site, including equipment management information
Global database of Fieldbus equipment, control level and HMI (human-machine interface)
Module identification with production operating parameters
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Complete self diagnosis
Compact and rugged design
Front panel wiring
DIN rail (U-shaped) mounting well can be directly installed on the wall, which is simple and convenient
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Allowable operating ambient temperature 60 C, automatic temperature monitoring
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EMC (electromagnetic compatibility) conforms to en50082 standard
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Certification: CE, Namur, CSA, csa-nrtl, FM class 1
