Main types and application software of Siemens S7 Series PLC

The programmable controller produced by Siemens in Germany is widely used in China, and has been used in metallurgy, chemical industry, printing production line and other fields. Siemens PLC products include logo,s7-200,s7-300,s7-400, industrial networks, HMI human-machine interfaces, industrial software, etc.

Siemens S7 Series plc is small, fast and standardized, with network communication capability, stronger function and higher reliability. S7 Series PLC products can be divided into micro-plc (such as S7-200), small-scale performance requirements of the PLC (such as s7-300) and medium, high-performance requirements of the PLC (such as s7-400) and so on.

1. SIMATIC s7-200 PLC

S7-200 plc is an ultra-small plc, it is suitable for all walks of life, all kinds of occasions in the automatic detection, monitoring and control. The powerful features of the S7-200 plc make it possible to implement complex control functions regardless of the single-machine operation or even network.

The S7-200PLC is available in 4 different base models and 8 CPUs to choose from.

2. SIMATIC s7-300 PLC

The s7-300 is a modular, small PLC system that meets the needs of medium performance applications. A wide range of individual modules can be combined to form different requirements of the system. Compared with S7-200 PLC, S7-300 PLC adopts modular structure with high speed (0.6~0.1μs) instruction operation speed, and more complicated arithmetic operation is realized by floating-point arithmetic more effectively. A software tool with a standard user interface facilitates the user to assign parameters to all modules; The convenient HMI service has been integrated into the s7-300 operating system, and the programming requirements of man-machine dialogue are greatly reduced. The Simatic Human Machine Interface (HMI) obtains data from the s7-300 and s7-300 transmits the data at a user-specified refresh rate. The s7-300 operating system automatically handles the transmission of data; The intelligent diagnosis system of the CPU continuously monitors the function of the system, logs errors and special system events (such as: timeout, module replacement, etc.); Multilevel password protection enables users to protect their technical secrets highly and effectively. Prevent unauthorized copying and modification; s7-300 plc with Operation mode selector switch, operation mode selector switch like key can be pulled out, when the key is pulled out, you can not change the operation mode, so as to prevent illegal deletion or rewriting user program. With a powerful communication function, the S7-300 PLC provides communication configuration functionality through the user interface of the programming software Step 7, which makes the configuration very easy and simple. S7-300 Plc has a variety of communication interfaces, and through a variety of communication processors to connect as-I bus interface and industrial Ethernet bus system, the serial communication processor is used to connect to point-to-points communication system, multi-point interface (MPI) integrated in the CPU, used to connect the programmer, PC, Human-machine interface system and other automatic control system such as Simatic S7/m7/c7.

3. SIMATIC s7-400 PLC

S7-400 plc is a programmable controller for medium and high-grade performance range.

S7-400 plc is a modular fanless design, reliable and durable, but also can choose a variety of levels (function upgrade) of the CPU, and with a variety of common functions of the template, which allows users to combine into different special systems. When the scale of control system is enlarged or upgraded, the system can be upgraded and fully satisfied as long as some templates are properly added.

4. Industrial Communication Network

Communication network is the backbone of automation system, Siemens fully integrated automation network platform provides consistent communications from the control level to the field level, "SIMATIC NET" is the whole network of products, they can be in different parts of the plant, in different automation stations and through different levels of exchange of data, There are standard interfaces and are fully compatible with each other.

5. Human Machine Interface (HMI) hardware

HMI hardware with the use of PLC, to provide users with data, graphics and event display, mainly the text operator panel TD200 (can display Chinese), OP3,OP7,OP17, etc., Graphics/text operation panel op27,op37, touch screen operation panel tp7,tp27/37,tp170a /b etc; simatic panel type PC670, etc. Personal computers (PCs) can also be used as HMI hardware. The HMI hardware requires software (such as Protool) configuration to be used with the PLC.

6. SIMATIC S7 Industrial Software

Siemens ' industrial software is divided into three different categories:

(1) Programming and engineering tools programming and engineering tools include all the tools that are required for control of programming, configuration, simulation, and maintenance, based on PLC or PC. Step 7 Standard Package Simatic S7 is a project management tool for S7-300/400,c7 PLC and Simatic WINAC configuration programming and maintenance based on PC control products, step 7-micro/ Win is the S7-200 Series PLC programming, on-line simulation software running on the Windows platform.

(2) PC-based control software PC-based control system Winac allows the use of personal computers as a programmable controller (PLC) to run the user's program, running in the installation of the Windows NT4.0 operating system of the Simatic industrial computer or any other commercial machine. Winac provides two kinds of PLC, one is a software plc, on the user's computer as a Windows task to run. The other is the Slot plc (a PC card is installed on the user's computer) and it has all the functions of the Hardware PLC. The Winac is fully compatible with the Simatic S7 series processors and is programmed with a unified simatic programming tool such as Step 7, which can be run on Winac or on S7 series processors.

(3) HMI software human-machine interface software for user automation projects to provide human-machine interface (HMI) or SCADA system, support a wide range of platforms. There are two kinds of HMI software, one is applied to machine-level protool, and the other is WINCC for monitoring level.

The Protool is suitable for the configuration of most HMI hardware, from the operator panel to the standard PC, which can be configured efficiently with the Protool integrated in step 7. Protool/lite is used for the configuration of text display, such as: Op3,op7,op17,td17. The Protool/pro is used for the configuration of standard PCs and all Siemens HMI products, and Protool/pro is not just a configuration software, its running version is also used for the monitoring system of the Windows platform.

WINCC is a truly open, SCADA (supervisory Control and data acquisition) software for monitoring and data acquisition, which can be run on any standard PC. WINCC simple operation, high system reliability, and step 7 function integration, direct access to the PLC hardware fault system, save project development time. Its design is suitable for a wide range of applications, can be connected to existing automation environment, has a large number of communication interfaces and comprehensive process information and data processing capabilities, its latest WinCC5.0 support in the office through IE browser Dynamic monitoring of the production process.

Main types and application software of Siemens S7 Series PLC