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Siemens New Generation PLC S7-1200

香港嘉玮科技有限公司   作者:SystemMaster 发布日期: 2014-05-15 15:53:07   点击率:592

The S7-1200 is a new generation of small PLCs from Siemens, which represents the development direction of the next generation of PLC. It integrates the Ethernet interface and the very strong craft function, the programming software STEP 7 Basic has integrated the WinCC basic which is used for the man-machine interface configuration, the hardware and the network configuration, the programming and the monitor all use the graphical way. 
Features of the S7-1200: 
1. Extremely convenient Ethernet communication. Using a plain Ethernet cable, it can be downloaded and monitored, providing the easiest way for laptops to communicate with PLC. 
2. The design of the instruction set is simple and reasonable, some instructions (such as data conversion instruction) can set one or two Operand data types, one instruction is equivalent to multiple instructions of S7-200 / 300 / 400. 
3. Only ladder diagram and function block diagram language, no statement table language. 
4. The program structure is basically the same as S7-300 / 400.Instruction sets, program structures and programming software should be compatible with the S7-1500 as an alternative to the S7-300 / 400. 
5.STEP 7 Basic adopts the multi-window interface similar to WinCC flexible, which is the configuration software of Siemens man-machine interface. At the same time, it displays item tree window, program area, patrol window of configuration and display information, and object list of instruction list or man-machine interface, etc. The software is very easy to use, for example, you can drag and drop local variables in the interface area of the variable table and block directly into the ladder diagram. The software is easy to use. 
6. All kinds of hardware, network and parameters are set by means of graphic and tabular configuration. It is more intuitive and convenient than the "wizard" function and system block of the S7-200. 
7. The functions and interfaces of the integrated WinCC Basic are essentially the same as those of WinCC flexible. PLC is configured and programmed in the same project as the reduced Series Panel, and the human-machine interface can use PLC variables directly. The indicator lamp works better than the WinCC flexible. It has the function of human-machine interface simulation. 
8. Has a stronger function than the S7-300 reference data, there are a variety of ways to display cross-data. You can quickly see how individual variables are used in PLC and HMI. 
9. It has strong fault diagnosis and display function, diagnosis buffer, diagnosis tab of patrol window and instructions to read error information. You can use LED to display the channels of faulty analog modules. 
10.CPU integrates two points of analog, integrated high-speed counter and high-speed output of the function and use of basically the same as the S7-200. 
A 1AO or 2DI/2DO signal board can be installed on the 11.CPU. The latter can be used for high speed input and output, which can make up for the defect that relay type CPU can not output high speed pulse. 
The parameter setting and debugging of 12.PID is convenient and intuitionistic. It has the function of parameter self-setting and can control 16 loops. With a AO signal board, you can achieve PID closed-loop control. The PID parameter self-tuning function is easy to use. 
13. The communication function is very strong, the Ethernet interface can realize the communication between the S7-1200 and the computer or the reduced series panel, the communication between the S7-1200 and the S7-200, the communication between the S7-1200 and the S7-200, the communication between the S7-300 / 400, the communication between the S7-1200 and the WinCC and the OPC communication between the S7-1200 and the S7-1200. 
14. With serial communication interface, it can realize USS communication with inverter, Modbus communication with computer and S7-200.


S7-1200是西门子公司的新一代小型PLC,代表了下一代PLC的发展方向。它集成了以太网接口和很强的工艺功能,编程软件STEP 7 Basic集成了用于人机界面组态的WinCC Basic,硬件和网络的组态、编程和监控均采用图形化的方式。

S7-1200特点:

1.极为方便的以太网通信。使用普通的以太网电缆,可以下载和监控,提供了笔记本电脑与PLC通信的最简单的方法。

2.指令系统的设计简单合理,有的指令(例如数据转换指令)可以设置一个或两个操作数的数据类型,一条指令相当于S7-200/300/400的多条指令。

3.只有梯形图和功能块图语言,没有语句表语言。

4.程序结构基本上与S7-300/400相同。指令系统、程序结构和编程软件应该与替代S7-300/400S7-1500兼容。

5.STEP 7 Basic采用与西门子人机界面的组态软件WinCC flexible类似的多窗口界面,同时显示项目树窗口、程序区、组态和显示信息的巡视窗口,以及指令表或人机界面的对象列表等。软件的使用极为方便,例如可以将变量表和块的接口区中的局部变量直接拖放到梯形图中。软件很容易上手。

6.各种硬件、网络和参数采用形象直观的图形和表格组态的方法来设置。比S7-200向导功能和系统块更为直观和方便。

7.集成的WinCC Basic的功能和界面与WinCC flexible基本上相同。PLC与精简系列面板在同一个项目中组态和编程,人机界面可以直接使用PLC的变量。指示灯比WinCC flexible的更好用。有人机界面仿真功能。

8.具有比S7-300的参考数据更强的功能,有多种显示交叉数据的方法。可以快速查看单独的变量在PLCHMI中使用的情况。

9.有很强的故障诊断和显示功能,有诊断缓冲区、巡视窗口的诊断选项卡和读取错误信息的指令。可以用LED显示有故障的模拟量模块的通道。

10.CPU集成了两点模拟量,集成的高速计数器和高速输出的功能和使用方法与S7-200基本上相同。

11.CPU上可安装一块1AO2DI/2DO信号板。后者可用于高速输入、高速输出,可弥补继电器型CPU不能输出高速脉冲的缺陷。

12.PID的参数设置和调试方便直观,有参数自整定功能,可控制16个回路。配一块AO信号板,就可以实现PID闭环控制。PID参数自整定功能很好用。

13.通信功能极强,以太网接口可以实现S7-1200与计算机或精简系列面板的通信,S7-1200之间的通信,S7-1200S7-200S7-300/400的通信,S7-1200WinCCOPC通信。

14.配上串行通信接口后,可以实现与变频器的USS通信,与计算机和S7-200Modbus通信。