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The programmable controllers produced by Siemens in Germany are also widely used in China, with applications in metallurgy, chemical industry, printing production lines, and other fields. Siemens' PLC products include logos, S7-200, S7-300, S7-400, industrial networks, HMI human-machine interfaces, industrial software, etc. Today, the Siemens Henan agent will provide you with a detailed explanation of Siemens' products.
The Siemens S7 series PLC has small size, fast speed, standardization, network communication capability, stronger functionality, and higher reliability. The S7 series PLC products can be divided into micro PLCs (such as S7-200), PLCs with small-scale performance requirements (such as S7-300), and PLCs with medium to high performance requirements (such as S7-400).
1．SIMATICS7-200PLC
S7-200 PLC is an ultra compact PLC that is suitable for automatic detection, monitoring, and control in various industries and occasions. The powerful functions of S7-200 PLC enable it to achieve complex control functions whether running alone or connected to a network.
S7-200 PLC can provide 4 different basic models and 8 types of CPUs for selection.
2．SIMATICS7-300PLC
S7-300 is a modular small PLC system that can meet applications with moderate performance requirements. Various individual modules can be widely combined to form systems with different requirements. Compared with S7-200 PLC, S7-300 PLC adopts a modular structure and has a high-speed (0.6~0.1 μ s) instruction operation speed; More complex arithmetic operations have been effectively implemented using floating-point operations; A software tool with a standard user interface that facilitates users to assign parameters to all modules; The convenient human-machine interface service has been integrated into the S7-300 operating system, greatly reducing the programming requirements for human-machine dialogue. The SIMATIC human-machine interface (HMI) retrieves data from S7-300 and transmits it at a refresh rate specified by the user. The S7-300 operating system automatically processes the transmission of data; The intelligent diagnostic system of the CPU continuously monitors whether the system's functions are normal, records errors and special system events (such as timeouts, module replacements, etc.); Multi level password protection can effectively protect users' technical secrets and prevent unauthorized copying and modification; The S7-300 PLC is equipped with an operation mode selection switch, which can be removed like a key. When the key is removed, the operation mode cannot be changed, which can prevent illegal deletion or rewriting of user programs. With powerful communication capabilities, the S7-300 PLC can provide communication configuration functions through the user interface of programming software Step7, making configuration very easy and simple. The S7-300 PLC has multiple communication interfaces and connects to the AS-I bus interface and industrial Ethernet bus system through various communication processors; Serial communication processors are used to connect point-to-point communication systems; Multi point interface (MPI) is integrated into the CPU, used to simultaneously connect programmers, PCs, human-machine interface systems, and other automation control systems such as SIMATIC S7/M7/C7.
3． SIMATICS7-400PLC
S7-400 PLC is a programmable controller used in the mid to high performance range.
The S7-400 PLC adopts a modular fanless design, which is reliable and durable. It can also use CPUs of multiple levels (with gradually upgraded functions) and is equipped with templates for various general functions, allowing users to combine them into different specialized systems according to their needs. When the scale of the control system is expanded or upgraded, as long as some templates are appropriately added, the system can be upgraded and fully meet the needs.
4. Industrial communication network
The communication network is the backbone of automation systems, and Siemens' fully integrated automation network platform provides consistent communication from the control level all the way to the field level. "SIMATIC NET" is the general term for all network series products, which can exchange data in different departments of the factory, at different automation stations, and through different levels. They have standard interfaces and are compatible with each other.
5. Human Machine Interface (HMI) hardware
HMI hardware is used in conjunction with PLC to provide users with data, graphics, and event display, mainly including text operation panel TD200 (which can display Chinese), OP3, OP7, OP17, etc; Graphic/text operation panels OP27, OP37, touch screen operation panels TP7, TP27/37, TP170A/B, etc; SIMATIC panel type PC670, etc. Personal computers (PCs) can also be used as HMI hardware. HMI hardware needs to be configured through software (such as ProTool) before it can be used in conjunction with PLC.
6. SIMATIC S7 Industrial Software
Siemens' industrial software is divided into three different types:
(1) Programming and engineering tools include all tools required for control such as programming, configuration, simulation, and maintenance based on PLC or PC. The STEP7 standard software package SIMATIC S7 is a project management tool for configuration programming and maintenance of PC based control products for S7-300/400, C7 PLC, and SIMATIC WinAC. STEP7 Micro/WIN is a programming and online simulation software for S7-200 series PLCs running on the Windows platform.
(2) PC based control software WinAC allows the use of a personal computer as a programmable logic controller (PLC) to run user programs on SIMATIC industrial computers or any other commercial computer installed with the Windows NT 4.0 operating system. WinAC offers two types of PLCs, one is a software PLC that runs as a window task on the user's computer. Another type is slot PLC (installing a PC card on the user's computer), which has all the functions of a hardware PLC. WinAC is compatible with SIMATIC S7 series processors, and its programming uses a unified SIMATIC programming tool (such as STEP7). The programs developed can run on both WinAC and S7 series processors.
(3) Human machine interface software provides a human-machine interface (HMI) or SCADA system for user automation projects, supporting a wide range of platforms. There are two types of human-machine interface software, one is ProTool for machine level applications, and the other is WinCC for monitoring level applications.
ProTool is suitable for configuring most HMI hardware, from the operator panel to standard PCs, and can be effectively configured using ProTool integrated in STEP7. ProTool/lite is used for configuring text display, such as OP3, OP7, OP17, TD17, etc. ProTool/Pro is used to configure standard PCs and all Siemens HMI products. ProTool/Pro is not just a configuration software, its running version is also used for monitoring systems on the Windows platform.
WinCC is a truly open SCADA (Supervisory Control and Data Acquisition) software designed for monitoring and data acquisition, which can run on any standard PC. WinCC is easy to operate and has high system reliability. It is integrated with STEP7 function and can directly enter the hardware fault system of PLC, saving project development time. Its design is suitable for a wide range of applications and can be connected to existing automation environments. It has a large number of communication interfaces and comprehensive process information and data processing capabilities. Its latest WinCC5.0 supports dynamic monitoring of production processes in the office through the IE browser.
