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03.11.2020

SIMATIC S7 programmable logic controllers. SIMATIC S7 programmable logic controllers Siemens simatic s7 300 run control

The article deals with programmable controllers of the families SIMATIC S7-300, SIMATIC S7-400 and computer control systems SIMATIC WinAC. Detailed technical and operational characteristics are given.

Siemens LLC, Moscow

The Automation Systems Division of the Industrial Automation Department of the SIEMENS concern (SIEMENS IA AS) is one of the world's largest manufacturers technical means management. Its products are widely known all over the world under the SIMATIC trademark.

SIMATIC today is a powerful complex of software and hardware controls, which unites in its structure: industrial software SIMATIC Industrial Software; programmable controllers of the SIMATIC S7 families; industrial computers SIMATIC PC and programmers SIMATIC PG; computer control systems SIMATIC WinAC; stations of distributed I / O systems SIMATIC DP; hardware and software for the systems of the human-machine interface SIMATIC HMI; hardware and software for industrial communication organization SIMATIC NET; control systems for continuous processes SIMATIC PCS7; production control systems SIMATIC IT.

Today SIEMENS is the world's largest manufacturer of universal programmable controllers, and its modern products are represented by programmable controllers of the SIMATIC S7-200, SIMATIC S7-300, SIMATIC S7-400 families. This article will take a closer look at the S7-300 and S7-400 series. All of these controllers have powerful communication capabilities and are capable of communicating over the Internet, Industrial Ethernet, PROFIBUS and MPI.

SIMATIC S7-300

SIMATIC S7-300 is a modular programmable controller designed for building control systems of medium complexity. Depending on the type of CPU used, the S7-300-based systems are capable of servicing from 16 discrete inputs / outputs to 65,536 discrete or 4096 analog I / O channels. The presence of a wide range of central processors, interface, communication, signal and functional modules makes it easy to adapt the controller hardware to the requirements of the tasks being solved.

An S7-300 I / O system can consist of two parts: a local I / O system and a distributed I / O system. The local I / O system integrates all modules installed in the base unit and expansion racks of the controller. A distributed I / O system is built on the basis of remote I / O stations and field devices connected to a programmable controller via PROFINET, PROFIBUS and AS-Interface networks.

The S7-300 can use 16 types of central processing units. All central processors are equipped with a built-in MPI interface, which is used for programming the controller and its maintenance, as well as for building the simplest network structures with cyclic exchange of global data. Global data exchange is supported at the configuration level and does not require controller programming. MPI allows you to link up to 32 stations. The data transfer rate in the network can reach 187.5 Kbps.

The central processing units CPU 31x-2DP have an integrated PROFIBUS DP interface and can act as a master or slave network device. The data transfer rate can be up to 12 Mbps. Maximum amount The distributed I / O stations to be connected are determined by the type of CPU.

The central processing units CPU 31x-2PN / DP are equipped with an integrated PROFINET interface and a combined MPI / DP interface. These central processing units are capable of operating simultaneously in distributed I / O systems based on Industrial Ethernet (PROFINET IO) with a baud rate of 10 or 100 Mbit / s, as well as in distributed I / O systems based on PROFIBUS DP and exchange data between these networks ... S7-300 controllers with other central processing units can be connected to the PROFINET network via the CP 343-1 communication processor with operating system V2.0 and higher.


Rice. Family of modular programmable controllers SIMATIC S7-300

Central processing units CPU 31xC are equipped not only with communication interfaces, but also with a set of built-in inputs and outputs. Like the S7-200, the built-in inputs of the CPU 31xC are universal. Such central processing units can be used as ready-made control units without the use of or with the use of additional expansion modules. CPU 31xC provide support for a variety of technology functions at the level of their operating system. In general, these functions include high-speed counting, frequency or period measurement, PID control and positioning.

All CPUs use an MMC micro memory card (3.3V NVFlash) as load memory. This card stores the controller program, hardware configuration parameters and other data. Optionally, MMC can be used to save project archive and data logging. In the event of a power failure to the controller, this card performs an unattended save of all current data.

The group of signal modules includes input / output modules for digital and analog signals. In addition to the simplest I / O modules, this group includes modules with an extended set of diagnostic functions, capable of generating alarm messages about failures in the operation of internal electronics, short circuits or open circuits in external circuits. A wide range of analog signal input modules are highly versatile and can be used to operate at various measurement ranges. For example, in the 6ES7 331-1KF01-0AB0 module, each of the 8 channels is configured independently of the others and can be used to measure unified signals of current or voltage, resistance or temperature (with thermocouples or resistance thermometers).

S7-300 function modules are intelligent I / O modules equipped with an embedded microprocessor and focused on solving typical automation tasks: high-speed counting, positioning, PID control, high-speed processing of logic signals, etc. The use of functional modules allows unloading the central processor of the controller from performing resource-intensive tasks. Moreover, a number of functional modules can perform their assigned functions even if the central processor of the programmable controller stops.

A set of communication processors S7-300 allows the controller to be connected to Industrial Ethernet, PROFINET, PROFIBUS, AS-Interface networks, to support data exchange via the Internet, to maintain communication via serial interfaces RS-232, RS-422 / RS-485 or TTY (20 mA ).

All modules are mounted on the S7-300 profile rail. Connection to the internal bus of the controller is carried out using special connectors included in the delivery set of each module. External circuits are connected through removable front connectors, closed with plastic doors. The presence of front connectors simplifies installation work and allows replacement of modules without dismantling from external circuits. The first installation of the front connector on the module is automatically accompanied by the operation of its mechanical coding. In the future, this front connector can only be installed on a module of the same type.

The settings for the functional and communication modules are stored in the memory of the central processor. This allows the replacement of intelligent modules without re-configuring the system.

SIMATIC S7-400

SIMATIC S7-400 are the most powerful programmable controllers of the SIMATIC family. They are designed to solve complex problems automatic control, have high performance, support multiprocessor configurations and are capable of servicing up to 131072 discrete or up to 8192 analog I / O channels.

The high performance of the controller is provided not only by the high computing power of the central processors, but also by the support of parallel access to the program memory and data memory.

The S7-400 has a modular design and allows the use of power supply modules, central processing units, signal, functional, communication and interface modules. All local and distributed I / O modules are hot-swappable. If necessary, the controller can be equipped with redundant power supplies.

All that has been said about the signal, functional and communication modules of the S7-300 controller fully applies to the modules of the S7-400 controller.

The controller can be equipped with 7 types of central processing units. If necessary, up to 4 central processors can be installed in one S7-400 controller. All central processing units are equipped with an integrated MPI / DP combo interface, most processors have additional PROFIBUS DP interfaces. A distinctive feature of the built-in MPI interfaces is the support of the data transfer rate of 12 Mbps.

The S7-400 has extremely powerful communication capabilities. Many engineering solutions take into account this feature of the S7-400 and are based on using only distributed I / O systems of this controller. The S7-400 fits perfectly into such configurations. For example, the S7-400, which includes a power supply module, a CPU 417-4 central processing unit and a CP 443-1 communication processor, Advanced provides connectivity to 4 PROFIBUS DP networks and 4 Industrial Ethernet or PROFINET networks.

A significant advantage of the S7-400 programmable controllers is the support for CiR technology and clock synchronization in PROFIBUS and PROFINET networks.

CiR (Configuration in RUN) technology allows you to make changes to the configuration of the control system without stopping it and without stopping the corresponding production or technological process. CiR allows you to:

Add new or remove existing distributed I / O stations and field devices that act as PROFIBUS DP / PA slaves;

Add new or remove existing modules of SIMATIC ET 200M distributed I / O stations;

Reconfigure the modules of the SIMATIC ET 200M station (for example, in the case of replacing some sensors with others);

Cancel entered configurations.

The clock synchronization support allows synchronizing multiple cycles in a distributed I / O system: controller program execution cycles, PROFIBUS DP communication cycles, I / O station I / O service cycles, etc. The errors caused by the time mismatch of the read information disappear, the accuracy of the distributed measuring systems, positioning and automatic control systems.

To build control systems with increased requirements for the reliability of their functioning, programmable controllers SIMATIC S7-400H can be used. The S7-400H consists of two identical subsystems that operate on a master-slave basis. Each subsystem necessarily includes one or two power supplies and a central processor. If necessary, these subsystems can be supplemented with other modules. The central processors of the two subsystems are interconnected by two synchronization channels based on optical cables.

When using standard design options for the I / O system, all redundancy functions are taken over by the operating system of the S7-400H central processors. This allows the development of the controller program without taking into account the presence of two central processors in the system, the presence of redundant I / O channels and redundant communication channels. A program written for a standard S7-400 controller can be loaded into an S7-400H and used to maintain a redundant system. In the most unfavorable combination of circumstances, the shockless switching on of the reserve in the S7-400H occurs in no more than 100 ms.

To build an S7-400H, only central processing units of the CPU 414-4H and CPU 417-4H types can be used. In terms of their technical characteristics, these central processors are closest to the CPU 414-3 and CPU 417-4, respectively. The difference lies in the composition of the interfaces used and operating system... Each H-CPU is equipped with one MPI / DP combo interface, one PROFIBUS DP interface and two slots for installing synchronization modules.

S7-400H programmable controllers provide extended support for CiR technology, allowing you to change some settings for central processing units, as well as the composition of I / O modules in the controller mounting racks.

For programming, configuring hardware and industrial communication systems, setting parameters and diagnostics of SIMATIC S7-300 / -400 programmable controllers, the STEP 7 package is used. In addition, for programming these types of controllers, engineering tools can be used that include programming languages high level S7-SCL, S7-GRAPH, S7-HiGraph, CFC, etc.


Rice. Family of modular programmable controllers SIMATIC S7-400

SIMATIC WinAC

SIMATIC WinAC is a set of tools for the implementation of complete solutions in the field industrial automation PC-based. This complex includes components for creating applications of "soft" and "hard" real-time modes, software visualizations, interfaces for data exchange with standard software products, components for connecting to information networks, development tools, etc. This variety of options guarantees each user the minimization of system integration costs.

Any standard personal computer or an industrial-grade personal computer can act as a hardware platform. Combination software product SIMATIC WinAC with personal computer SIMATIC PC is a complete turnkey solution, the implementation of which will significantly reduce the time required for design and commissioning.

A decisive role in deciding in favor of a flexible programmable controller or a PC-based system is played by the presence of additional tasks that are not directly related to the problem of technological control, such as, for example, data processing tasks, visualization or communication functions. The higher the proportion of tasks of this kind, the more profitable the use of PC-based systems can be.

PC-based control with SIMATIC WinAC is much more than just a software version of a flexible programmable controller. The WinAC-Controlling component with a PC card, which is fully compatible with SIMATIC S7 controllers, plays an exceptional role. This component not only takes over the download and startup of the control program, but also provides the system as a means of accessing distributed I / O devices via PROFIBUS-DP and provides rich diagnostic functions. A SIMATIC WinCC component can be used as a visualization tool, which can be optimally integrated into WinAC. For those wishing to use other HMI software, there is the option of integrating this software via OLE or OPC interfaces. Currently, WinAC technology also includes control and positioning components. WinAC-Computing allows you to link technological process data with such standard software applications like Excel or Access. And of course, within the system there is a component (WinAC-Networks) that allows you to connect to standard computing networks(for example TCP / IP).

The same STEP7 tools are used for planning and programming the system as for SIMATIC S7 controllers (e.g. AWL, KOP, FUP, SCL, process flow programming).

Siemens LLC, Moscow,

  • Siemens SIMATIC S7-300 controllers are standard design for operation in normal industrial environments.
  • Siemens SIMATIC S7-300F controllers with built-in safety automation functions for operation in normal industrial environments.
  • Siemens SIPLUS S7-300 controllers for outdoor installation and operation in harsh industrial environments.

Modular programmable controller Siemens Simatic S7-300

Siemens SIMATIC S7-300 is a modular, universal programmable controller. The modular design, operation with free cooling, the possibility of using distributed I / O structures, and the ease of maintenance ensure the economical use of SIMATIC S7-300 when solving a wide range of automation tasks. The areas of application of SIMATIC S7-300 include automation:

  • Special purpose vehicles.
  • Textile machines.
  • Packaging machines.
  • General engineering systems.
  • Production of automation equipment.
  • Tool manufacturing.
  • Electrical and electronic industries, etc.

Several types of central processing units of different performance and a wide range of modules for various purposes with many built-in functions allow for maximum adaptation of the equipment to the requirements of the problem being solved. When modernizing and developing production, the controller can be easily supplemented with the required set of modules. SIMATIC S7-300 is a universal controller:

  • It is ideal for industrial environments due to its high EMC, vibration and shock resistance.
  • Modular programmable controller for universal use for solving automation tasks of low and medium complexity.
  • A wide range of modules for maximum adaptation of the equipment to the solution of any task.
  • High flexibility, the ability to use distributed I / O systems, powerful communication capabilities.
  • Convenient design, easy installation, work with free cooling.
  • Ease of expanding the system during the modernization of the facility.
  • High performance thanks to the large number of built-in functions.

Functions of the Siemens SIMATIC S7-300 programmable controller

Siemens SIMATIC S7-300 programmable controllers support a wide range of functions that make it possible to maximally simplify the process of developing a program, its debugging, reducing the cost of installation and commissioning, as well as maintenance of the controller during its operation:

  • Fast command execution: Command execution times of about 0.1 μs allow the controller to be used to solve a wide range of automation tasks in various areas of industrial production.
  • Floating point math support: Allows you to support complex complex digital information processing algorithms.
  • User-friendly parameter setting interface: Simple tools with a single user interface are used to set the parameters of all modules. This significantly reduces the cost of personnel training.
  • Human Machine Interface (HMI): The service functions of the human machine interface are built into the operating system of the S7-300 controller. These functions significantly simplify programming: the system or device of the human-machine interface SIMATIC HMI requests the necessary data from the SIMATIC S7-300 controller, the controller transmits the requested data at a specified frequency. All data exchange operations are performed automatically under the control of the operating system of the controller. All tasks are performed using the same symbolic names and common base data.
  • Diagnostic functions: The central processors are equipped with an intelligent diagnostic system that provides continuous monitoring and recording of failures and specific events (timer errors, module failures, etc.). Messages about these events are accumulated in a circular buffer and are date and time stamped, which allows further processing of this information.
  • Password protection: Password protection provides effective protection of user programs against unauthorized access, attempts to copy or modify the program.

Main characteristics of Siemens SIMATIC S7-300

S7-300 has a modular design and allows you to use a wide range of modules for a wide variety of purposes. All modules work with free cooling. Depending on the type of CPU used, the local I / O system of the S7-300 programmable controller can include up to 32 modules. In this case, all controller modules are located in one base unit and expansion racks, of which there can be no more than 3. Expansion modules for Siemens SIMATIC S7-300:

  • Central processing units Siemens CPU: To solve problems of various levels of complexity, several types of central processors of various capacities can be used, including models with built-in I / O and a set of built-in technological functions, as well as models with built-in PROFIBUS DP, PROFIBUS DP / DRIVE, Industrial Ethernet / PPROFINET, PtP interfaces.
    • CPU 312 for automation of small installations
    • CPU 314 for automation tasks requiring more programs and faster performance
    • CPU 315-2 DP for automation tasks requiring medium to large programs and distributed I / O systems based on PROFIBUS DP
    • CPU 315-2 PN / DP for solving automation tasks requiring the use of medium and large programs, as well as distributed I / O systems based on PROFIBUS DP and PROFINET IO; can work as part of PROFINET CBA systems
    • CPU 317-2 DP for automation tasks requiring large programs and distributed I / O systems based on PROFIBUS DP
    • CPU 317-2 PN / DP for solving automation tasks requiring the use of large programs, as well as distributed I / O systems based on PROFIBUS DP and PROFINET IO; can work as part of PROFINET CBA systems
    • CPU 319-3 PN / DP for solving automation tasks with the highest requirements for the volume of programs, information processing speed, maintenance of distributed I / O systems based on PROFIBUS DP and PROFINET IO; can work as part of PROFINET CBA systems
    • CPU 312C: Compact CPU with onboard digital I / O and high-speed counting functions
    • CPU 313C: Compact CPU with onboard digital and analogue inputs and outputs and high-speed counting functions
    • CPU 313C-2 PtP: compact CPU with a set of onboard digital inputs and outputs, an additional serial interface and support for high-speed counting functions
    • CPU 313C-2 DP: compact CPU with integrated digital inputs and outputs, optional PROFIBUS DP interface and high-speed counting functions
    • CPU 314C-2 PtP: compact CPU with a set of built-in digital and analog inputs and outputs, an additional serial interface and support for high-speed counting and positioning functions
    • CPU 314C-2 DP: compact CPU with integrated digital and analogue inputs and outputs, optional PROFIBUS DP interface and support for high-speed counting and positioning functions
    • CPU 315F-2 DP: For tasks requiring medium to large programs and for servicing distributed I / O systems based on PROFIBUS DP
    • CPU 315F-2 PN / DP: for solving tasks requiring the use of medium and large programs, as well as servicing distributed I / O systems based on PROFIBUS DP and PROFINET IO networks; can be used in PROFINET CBA systems
    • CPU 317F-2 DP: for solving tasks requiring the use of large programs, as well as servicing distributed I / O systems based on PROFIBUS DP
    • CPU 317F-2 PN / DP: for solving tasks requiring the use of large programs, as well as servicing distributed I / O systems based on PROFIBUS DP and PROFINET IO networks; can be used in PROFINET CBA systems
    • CPU 319F-3 PN / DP: for solving tasks with the highest requirements for program volume, data processing speed, maintenance of distributed I / O systems based on PROFIBUS DP and PROFINET IO networks; can be used in PROFINET CBA systems
    • CPU 315T-2 DP: For medium to large program applications, PROFIBUS DP distributed I / O, motion control with up to 8 axes
    • CPU 317T-2 DP: for tasks requiring large programs, servicing distributed I / O systems based on PROFIBUS DP, motion control with up to 32 axes
  • Siemens SM signal modules used for input and output of discrete and analog signals:
    • Digital input modules SM 321.
    • Output modules for discrete signals SM 322.
    • I / O modules for discrete signals SM 323 and SM 327.
    • Analog input modules SM 331.
    • Analog signal output modules SM 332.
    • Analog I / O modules SM 334 and SM 335.
  • Siemens communication processors (CP) for connecting to industrial networks and organizing PtP connections:
    • Siemens communication processors for communication via PtP interface.
    • Siemens communication processors for servicing distributed I / O systems based on AS-Interface.
    • Siemens communication processors for servicing distributed I / O systems based on PROFIBUS DP and PROFINET IO.
    • Siemens communication processors for communication via PROFIBUS FMS.
    • Siemens communication processors for communication via Industrial Ethernet.
  • Functional modules Siemens FM for solving problems of high-speed counting, positioning and automatic control:
    • Counting modules Siemens FM 350-1
    • Counting modules Siemens FM 350-2
    • Siemens positioning modules
    • Rapid feed modules Siemens FM 351
    • Stepper Motor Modules Siemens FM 353
    • Siemens FM 354 Servo Motor Modules
    • Positioning and motion control modules Siemens FM 357-2
    • Service modules for ultrasonic position sensors Siemens SM 338
    • Service modules for synchronous-serial (SSI) positioning sensors Siemens SM 338 POS
    • Electronic control module Siemens FM 352
    • Modules high-speed boolean coprocessor Siemens FM 352-5
    • Automatic control module Siemens FM 355 and FM 355-2
    • Interface module for connecting positioning drive modules to PROFIBUS DP Siemens IM 178-4
    • Weighing and dosing modules Siemens SIWAREX
  • Siemens PS power supply modules for powering SIMATIC S7-300 equipment and converting input voltages ~ 120/230 V or = 24/48/60 / 110V into a stabilized output voltage = 24V:
    • Power supplies for programmable controllers SIMATIC S7-300 and distributed I / O stations SIMATIC ET 200M.
    • To convert the input voltage to AC or DC and form a stabilized output voltage = 24 V.
    • Rated load current 2, 5 or 10 A.
  • Siemens IM interface modules for communication between the base unit and expansion racks in a multi-row controller configuration: The Siemens IM 360 / IM 361 and IM 365 interface modules allow you to create multi-row configurations of S7-300 programmable controllers (from CPU 313C, CPU 314 and above), in which I / O modules are located not only in the base unit, but also in expansion racks. Expansion racks are connected via interface modules:
    • Siemens IM 365: Connection to the base unit of one expansion rack. An expansion rack can accommodate up to 8 modules. The distance between the posts is up to 1 m.
    • Siemens IM 360 / IM 361: Connection to the base unit for up to 3 expansion racks. Each rack can accommodate up to 8 modules. The distance between adjacent posts can be from 4 cm to 10 m.

Design features of the Siemens SIMATIC S7-300 controller

The design of the Siemens SIMATIC S7-300 controller is characterized by high flexibility, manufacturability and ease of maintenance:

  • Mounting the modules: All modules are mounted on the S7-300 rail and fixed in operating positions with screws.
  • Internal bus: Each module, excluding power supplies, is equipped with a built-in section of the internal bus of the controller. The connections between the modules are made using bus connectors on the back of the enclosure. Bus connectors are included with all modules, excluding CPU and power supply modules.
  • Front connectors: External connections for signal and function modules are made through removable front connectors equipped with snap or screw contacts. The use of front connectors simplifies installation work and allows you to replace modules without dismantling their external circuits.
  • Mechanical coding: The first installation of the front connector on the module is automatically accompanied by its mechanical coding. In the future, the front connector can only be installed on modules of the same type, which eliminates the possibility of errors when replacing modules.
  • TOP Connect: Flexible and modular SIMATIC TOP Connect connectors, which greatly simplify the installation of external signal module circuits in control cabinets.
  • Installation depth uniform for all modules: The connecting cables and wires are placed in the module installation channel and closed with a protective door. This allows a uniform installation depth for all controller modules.
  • Equivalent footprint: Most controller modules can be placed in the mounting racks in any order. Only the power supplies, central processing unit and interface modules should occupy fixed slots.
  • Mounting positions: Horizontal (the axis of the mounting rack is oriented in the horizontal plane) or vertical mounting of the mounting racks. When installed vertically, the cooling conditions of the modules deteriorate, so the upper limit of the operating temperature range is reduced to + 40 ° C.

Expansion Siemens SIMATIC S7-300

The local I / O system of an S7-300 programmable controller can include up to 32 signal, functional and communication modules (for S7-300 with CPU 312 or CPU 312C - up to 8 modules located in the base unit). All modules are installed in the controller mounting racks, the functions of which are performed by the S7-300 profile rails. In this case, the following rules must be observed:

  • Module placement: The controller can include one basic and up to three expansion racks. Each rack can accommodate up to 8 signal, function and communication modules. A central processor is installed in the base unit.
  • Interface modules: The racks are connected via interface modules installed in the base unit and in each expansion rack (one interface module per rack). In the base unit, the interface module is installed to the right of the central processor. Possible options local I / O system expansions depend on the type of interface modules used: - The use of IM 365 interface modules allows no more than one expansion rack to be connected to the base unit. The distance between the posts can be up to 1m. The expansion rack modules are powered from the power supply unit of the controller base unit. The expansion rack cannot accommodate communication modules and most function modules. - The use of interface modules IM 360 / IM 361 allows up to 3 expansion racks to be connected to the base unit. The IM 360 fits into the base unit, the IM 361 into each expansion rack. Expansion racks must be equipped with their own power supplies. From

Industrial communication Siemens SIMATIC S7-300

The S7-300 programmable controller has broad communication capabilities and allows you to use the following to organize data exchange:

  • built-in interfaces PtP, MPI, PROFIBUS DP and Industrial Ethernet / PROFINET of central processors;
  • communication processors for connection to AS-Interface, PROFIBUS and Industrial Ethernet;
  • communication processors for organizing PtP communication.

Distributed I / O systems based on PROFIBUS DP

The Siemens SIMATIC S7-300 controller can be connected to the PROFIBUS DP network as a master or slave network device via the integrated CPU interface or via the CP 342-5 / CP 342-5 FO communication processors. Any connection option allows you to create distributed I / O systems with high-speed data exchange between its components. The access to the I / Os of the local and distributed I / O systems from the user program is performed in the same ways. For this, the same configuration, addressing and programming options are used. The functions of PROFIBUS DP masters are capable of performing:

  • Programmable controllers SIMATIC S7-300 / S7-400 / C7, connected to the network via the integrated PROFIBUS DP interface of the central processor, communication processor or interface module (IM 467 / IM 467 FO in S7-400).
  • Computer control systems SIMATIC WinAC connected to the network via the built-in PROFIBUS DP interface of the slot controller or via the PROFIBUS DP communication processor of the computer.
  • SIMATIC S5-115U / H, S5-135U and S5-155U / H programmable controllers with IM 308 interface module.
  • SIMATIC 505 programmable controllers.

To ensure a sufficiently high performance, it is not recommended to use more than 2 masters on the same PROFIBUS DP network. The following can be used as PROFIBUS DP slaves:

  • Distributed I / O stations SIMATIC ET 200.
  • Central processing units of the programmable controller SIMATIC S7-400 with operating system from V3, connected to the network via the integrated PROFIBUS DP interface.
  • Programmable controllers SIMATIC S7-300 / C7 connected to the network via the integrated PROFIBUS DP interface or the CP 342-5 / CP 342-5 FO communication processor.
  • DP / ASi communication modules that enable the DP master to access sensors and actuators connected to the AS-Interface.
  • DP / PA communication modules and blocks that enable the DP master to access sensors and actuators connected to PROFIBUS-PA.
  • Video image analysis sensors of the SIMATIC VS 100/710/720 series.
  • Frequency inverters of the MICROMASTER, SIMOVERT MASTERDRIVES and SINAMICS series.
  • Protective and low-voltage switchgear with integrated DP slave interfaces.
  • Field level devices.

Programmers and computers with installed package STEP 7 and HMI devices and systems on PROFIBUS DP can only support PG / OP communication functions.

Distributed I / O systems based on PROFIBUS DP / DRIVE

PROFIBUS DP / DRIVE is an industrial network for organizing cyclical data exchange with frequency converters for positioning and motion control tasks. In SIMATIC S7-300, this communication option is able to support central processing units - CPU 315T-2 DP and CPU 317T-2 DP, equipped with an integrated PROFIBUS DP / DRIVE interface.

Distributed I / O systems based on PROFINET

SIMATIC S7-300 is capable of serving distributed I / O systems based on the PROFINET network. The PROFINET functions of the I / O controller are capable of performing:

  • Siemens SIMATIC S7-300 programmable controllers connected via the built-in interfaces of the CPU 315-2 PN / DP central processors or CPU 317-2 PN / DP.
  • Siemens SIMATIC S7-300 / C7 programmable controllers connected via the CP 343-1 V2 communication processor.
  • Siemens SIMATIC S7-400 programmable controllers connected via the built-in communication processor CP 443-1 Advanced.

The functions of slave devices are capable of performing:

  • SIMATIC ET 200S stations with interface module IM 151-3 PN.
  • SIMATIC ET 200pro stations with interface module IM 154-4 PN High Feature.
  • Video image processing sensors SIMATIC VS 130-2.
  • PROFIBUS DP slaves connected via IE / PB IO Link module.

Programmers and computers equipped with STEP 7 as well as operator panels in a PROFINET network only support PG / OP communication functions.

Distributed I / O systems based on AS-Interface

The connection to the AS-Interface is made via the CP 343-2 / CP 343-2P communication processors, which function as the AS-Interface master of the V2.1 specification. It is allowed to connect to one communication processor:

  • up to 62 discrete slaves serving up to 248 discrete inputs and up to 186 discrete outputs, or
  • up to 31 analog slaves serving up to 124 analog I / O channels
  • The complete network cycle with 62 discrete slaves is 10 ms.

Serial (PtP) communication

In the S7-300, communication via the PtP (Point-to-Point) interface is carried out via the integrated interfaces of the CPU 313C-2 PtP / CPU 314C-2 PtP central processors, as well as via the CP 340 and CP 341 communication processors. interfaces of the following types:

  • 20 mA current loop (TTY) (only in CP 341),
  • RS 232 / V.24 (only for CP 340 / CP 341),
  • RS 422 / RS 485.

The S7-300 interface can be connected via PtP: computers, printers, scanners, robot control systems, modems, etc.

  • with programmable controllers SIMATIC S7, SIMATIC S5, programmable controllers from other manufacturers,
  • with computers,
  • with robot control systems,
  • with printers,
  • with scanners, etc.

For the CP 341 communication processor, downloadable drivers for communication via Modbus RTU and Data Highway networks can be used.

Data exchange via MPI

The MPI interface is built into all types of central processing units of SIMATIC S7-300 programmable controllers. It can be used to build simple and inexpensive network structures.

Communication via PROFIBUS and Industrial Ethernet

Via communication processors, the SIMATIC S7-300 programmable controller can be connected to PROFIBUS and Industrial Ethernet networks and support data exchange:

  • with programmable controllers SIMATIC S7-300 / S7-400 / C7 / WinAC;
  • with programmable controllers SIMATIC S5-115 / S5-135 / S5-155;
  • with programmers, industrial or personal computers;
  • with devices and systems of the human-machine interface SIMATIC HMI;
  • with numeric systems program control, drives, robot control systems;
  • with programmable controllers and automation systems from other manufacturers.

To organize data exchange via PROFIBUS, the communication processor CP 343-5 is used, which provides support for the PROFIBUS FMS protocol. Three types of communication processors can be used to connect to Industrial Ethernet:

  • CP 343-1 Lean, providing support for the TCP / IP protocol, data exchange at a speed of 10/100 Mbit / s and work in server mode;
  • CP 343-1 V2, providing TCP / IP and PROFINET protocol support and data exchange at 10/100 Mbit / s;
  • CP 343-1 IT, capable of performing the functions of a WEB server and transmitting messages via e-mail;
  • CP 343-1 PN, which supports the PROFINET communication standard and allows the S7-300 to be used in modular systems automatic control CBA (Component Based Automation).

Siemens SIMATIC S7-300F programmable controllers

S7-300F programmable controllers are designed to build emergency protection systems, in which the occurrence of failures does not entail a danger to the life of the operating personnel, does not lead to environmental pollution, does not cause other dangerous consequences. On the basis of S7-300F programmable controllers, emergency protection systems can be created that meet the requirements:

  • safety classes AK 1… AK6 according to DIN V 19250 / DIN V VDE 0801;
  • safety levels SIL1… SIL 3 according to IEC 61508;
  • categories 1 ... 4 according to EN954-1.

S7-300F programmable controllers are capable of combining standard control functions with emergency protection functions. This allows the creation of integrated automatic control systems that perform the functions of standard control in relation to one and the functions of safety automation in relation to another part of the technological equipment. For the design and maintenance of such systems, a single set of industrial software is used.

  • Programmable controllers for building emergency protection systems (F-systems).
  • Compliance with the requirements of safety levels SIL1 ... SIL3 according to IEC 61508, safety classes AK1… AK6 according to DIN V 19250, safety categories 1… 4 according to EN 954-1.
  • Based on functionality S7-300 controller with F-modules.
  • Combines standard control functions with fail-safe functions, support for mixed configurations, including conventional and F-I / O modules.

The S7-300F programmable controller allows the use of local and distributed input-output systems to build emergency protection systems and safety automation. In the local I / O system, F-modules of the SM 326 and SM 336 types can be used for this purpose. The SM 336 modules can only work in the local I / O system of an S7-300F programmable controller with a CPU 317F-2 DP central processor. In the S7-300F distributed I / O system, the following can be used:

  • ET 200M stations equipped with F-modules SM 326 and SM 336.
  • ET 200S PROFIsafe stations equipped with PROFIsafe electronic modules as well as power modules for load feeders and frequency converters in the F version.
  • ET 200eco PROFIsafe stations.
  • ET 200pro PROFIsafe stations.

Operating modes of the industrial controller Siemens SIMATIC S7-300F

Fail-safe functions are supported at the F-program level of the S7-300F CPU as well as at the F-module level of the local and distributed I / O system. Differences in the values ​​of the input and output signals are detected at the hardware level of the F-modules. The central processor controls the progress of the program, performs a wide range of self-diagnostic functions, controls the progress of the logical and temporal execution of the program. Additionally, the central processor monitors the I / O system performance. If errors are detected, technological equipment is transferred to safe states.

Programming of Siemens industrial controller SIMATIC S7-300F

During operation, the central processing units CPU 315F-2 DP / CPU 317F-2 DP execute two sections of the program in parallel:

  • section for the implementation of standard control functions (standard program);
  • section on implementation of emergency protection functions (F-program).

To develop a standard program, STEP 7 is sufficient. The programming technology does not differ from that adopted for the S7-300. To develop an F program and configure an F system, STEP 7 must be supplemented with the optional software"S7 F Distributed Safety". This package contains a library of T? V certified function blocks and functions used to develop an F program. Programming is performed in LAD or FBD languages ​​using F-library components. Apply in the F-program others software modules forbidden. The S7 F Distributed Safety package contains a large set of sample F programs that can be adapted to the requirements of the problem being solved.

Siemens S7 F Distributed Safety Option Package The "S7 F Distributed Safety" package can be integrated into STEP 7 from V5.1 SP3. However, the capabilities of this package can be fully implemented with later versions of the STEP 7 package.

Siemens SIPLUS S7-300 programmable controllers

  • Universal programmable controllers for use in harsh industrial environments, based on the functionality of SIMATIC S7-300 controllers.
  • Extended operating temperature range (-25 ... + 60 ° C), higher resistance to vibration and shock loads, work in environments containing aggressive impurities and gases.
  • Ideal for the automotive, chemical, environmental, industrial, food and beverage industries, etc.
  • Replacement of expensive special purpose systems.
  • The Simatic S7-300 controller is designed to solve the most widespread industrial tasks of various levels of complexity.
  • The presence of a significant number of various modules allows you to optimally configure the PLC for a specific task
  • Wide network capabilities. With the S7-300 you can create fieldbus networks and integrate this PLC into existing network architectures
  • Compact and ergonomic body
  • Expandable system with CPU modules of various capacities
  • The presence of a huge number of built-in functions allows you to use the processor power to the fullest

Siemens S7-300 PLCs have a significant number of certificates and approvals, including:

  • Metrological certificate GOST R and certificate of conformity
  • Maritime Register Certificate
  • Certificate of the Main Directorate of State Energy Supervision on explosion protection of IIC modules SIMATIC S7 in explosion-proof design Ex
  • Permission to use the Federal Service for Atomic, Environmental and Technical Supervision.

The Siemens S7-300 controllers are most widely used in industry to solve problems of various levels of complexity, incl. for the automation of various machines and mechanisms, machine-building equipment, electrical equipment, water supply systems, etc.

Siemens Simatic S7-300 application

Design features of the S7-300 PLC

  • The lineup contains more than 20 types of CPU modules for tasks of any complexity.
  • AC and DC power supplies
  • A wide range of signal modules is offered for input and output of digital and analog signals, incl. modules with built-in explosion protection barriers, and FailSafe modules.
  • For the operation of the Simatic S7-300 PLC in various industrial networks, for example, PROFIBUS, Industrial Ethernet, PROFINET, AS-Interface or Point to Point communication systems, various communication processors have been developed and produced. SINAUT ST7 special modules are used when you need to organize modem communication based on S7-300.
  • To solve special problems of automatic control, positioning, weighing, motion control, functional modules are used. Many of these modules are capable of operating autonomously from the CPU and continue to perform the tasks assigned to them even if the CPU fails or stops.
  • To increase the number of modules connected to the CPU, interface modules are used. This allows you to use up to 32 different modules, creating multi-row configurations using the interface modules.

Convenience and flexibility

The modules are installed on a special profile rail. To connect the modules, use special bus connectors that come with the module.

Modules can be placed in any order on the profile rail. The fixed placement applies only to the power supply module, CPU module, and interface module. For quick installation and dismantling of modules, without the need to disconnect external circuits each time, use the front connectors (supplied separately).

Features of CPU Units

  • performance
  • memory capacity up to 8 MB (loaded as an MMC card)
  • the widest possibilities for building networks

The central processing units of the CPU 3xxC and CPU 31xT-2 DP series have built-in inputs and outputs, as well as they have additions to the operating system in the form of technological functions, which makes it possible to use them as ready-made control units.

The standard set of technological functions is focused on solving the following tasks:

  • PID control
  • high speed counting
  • measuring the frequency and duration of the period
  • work with discrete outputs in pulse mode

For diagnostics, building the simplest networks and programming, the Multi Point Interface (MPI) is used with which all CPUs of the S7-300 series are equipped.

Most of the CPUs have an additional built-in interface:

  • CPU 31… -2 DP have a PROFIBUS DP master / slave interface;
  • CPU 31… C-2 PtP have an interface for Piont to Point communication;
  • CPU 31… -… PN / DP have Industrial Ethernet interface, with PROFInet support;
  • The CPU 31… T-2 DP are equipped with a PROFIBUS DP / Drive interface for data exchange and synchronization of frequency converters acting as DP slaves.

More than 350 instructions have a system of CPU instructions, with which you can perform logical operations, arithmetic operations, data storage operations, etc. Step7 is used to write programs for Simatic S7-300 controllers.

Documentation and brochures for Simatic S7-300 in Russian

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Manual Siemens SIMATIC S7-300

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Summary

Below you will find the applications which are on the next pages of the manual for Siemens SIMATIC S7-300. If you want to quickly view the contents of the pages that are on the next pages of the manual, you can use them.

  • Modularity of design
  • Free cooling operation
  • Ability to use local and distributed I / O structures
  • Broad communication opportunities
  • Wide range of functions at the operating system level
  • Minimum operating and maintenance costs

What provides:

  • Effective use of controllers
  • Obtaining cost-effective solutions for building automation systems in various industries

Assignment of SIMATIC S7-300 controllers

S7-300 is a universal modular programmable controller for solving automatic control tasks of low and medium complexity. The effective use of controllers is facilitated by the availability of a wide range of central processors, I / O modules for discrete and analog signals, functional and communication modules, power supply modules and interface modules.

Scopes of controllers:

  • automation of special-purpose machines
  • automation of textile and packaging machines
  • automation of machine-building equipment
  • automation of equipment for the production of technical controls and electrical equipment;
  • construction of automatic control systems and positioned
  • automated measuring installations
  • in the automotive industry, mechanical engineering and machine tool construction
  • to control conveyors
  • in the manufacturing industry
  • in passenger transport control systems
  • in logistics systems

Design of SIMATIC S7-300 controllers

S7-300 controllers have a modular design and allow the use of the following devices:

Central processing unit (CPU)

execution of user programs and control of all controller nodes.

Power supply module (PS)

provides power to the controller from a 120/230 V AC mains or from a 24/48/60/110 V DC source.

Signal Modules (SM)

provide input-output of discrete and analog signals with various electrical and time parameters.

Communication Processors (CP)

connection of the controller to PROFIBUS, PROFINET, Industrial Ethernet, AS-Interface networks, organization of communication via the Internet or PtP (point to point) interface.

Function modules (FM)

are able to independently solve the problems of automatic control, positioning, weighing, high-speed signal processing, etc., are equipped with a built-in microprocessor and are able to perform the functions assigned to them even in the event of a stoppage of the central processor of the programmable controller.

Interface Modules (IM)

provide the ability to connect one or more I / O expansion racks to the base unit (rack with CPU).

Special purpose modules

this is simulation module SM 374 for generating input and displaying output discrete signals at the stage of debugging application programs and for checking the controller's performance during operation. AND false module DM 370 to reserve space for a signal module with still undefined parameters.

S7-300 controllers allow the use of up to 32 signal and function modules, as well as communication processors, distributed over 4 mounting racks. All modules work with free cooling. Programmable controllers do not support hot swapping of modules.

Data input-output system

The I / O system of an S7-300 programmable controller can include two parts: local and distributed I / O system... The local I / O system is formed by modules that are installed directly into the controller mounting racks. A distributed I / O system includes distributed I / O stations and field devices that are connected to the controller via PROFINET IO, PROFIBUS DP and AS-Interface networks.

Local I / O system

  • Depending on the type Cpu the system can include up to 8 or up to 32 signal, function and communication modules
  • All modules are installed in the mounting racks of the controller, the functions of which are performed by the profile rails S7-300
  • The system can include one base unit with a central processor and up to three expansion racks, which can accommodate up to 8 modules
  • Interface modules provide connection of racks to each other
  • The spacing between racks can be up to 10 m (when using the interface modules IM 360 and IM 361)

Distributed I / O system

    To implement broad communication opportunities S7-300 controllers are supplied with:
  • Communication processors (CP) for connection to PROFIBUS, PROFINET / Industrial Ethernet and AS-Interface networks, as well as to the Internet and for organizing serial communication channels RS 232, TTY, RS 422 / RS 485 via PtP interface
  • MPI-interface built into each central processor for communication with programmers, personal and industrial computers, human-machine interface devices and other systems
  • Additional PtP, PROFIBUS DP or Industrial Ethernet interfaces integrated in the central processor

General specifications

The table below shows the comparative technical data of programmable controllers in general industrial and SIPLUS S7-300 in a protected version.

General technical data of S7-300 controllers

Characteristic SIPLUS S7-300
Enclosure protection IP 20 conforming to IEC 60 529
External conditions
Operating temperatures for horizontal installation 0 ... 60 ° C 0 ... 60 ° C, -25 ... + 60 ° C or -25 ... + 70 ° C
Operating temperatures for vertical installation 0 ... 40 ° C -25 ... 40 ° C
Storage and transport temperatures -40 ... + 70 ° C -40 ... + 70 ° C
Relative humidity 5 ... 95% 5 ... 95%
Condensation Not allowed, RH difficulty level 2 conforming to IEC 1131-2 Allowed, RH level 2 conforming to IEC 1131-2 and IEC 721 3-3, class 3K5
Icing of printed circuit boards Not allowed Allowed, -25 ... 0 ° C, IEC 721 3-3, class 3K5
Atmosphere pressure 795 ... 1080 GPa 795 ... 1080 GPa
Pollution concentration -- According to IEC 721 3-3, class 3K3. SO2: more than 0.5 ‰, relative humidity 60%; test: 10 ‰ for 4 days. H2S: up to 0.1 ‰, relative humidity 60%; test 10 ‰ for 4 days.
Insulation
In circuits = 24 V Test voltage = 500 V
In ~ 220 V circuits Test voltage ~ 1460 V
Electromagnetic compatibility
Noise immunity IEC 61000-6-2, tests IEC 61000-4-2 ... IEC 61000-4-6
Hovering To EN 50081-2, tested to EN 55011, class A, group 1
Mechanical impact
Vibration IEC 68 Part 2-6: 10 ... 58 Hz / constant amplitude 0.075 mm; 58 ... 150 Hz / constant acceleration 1g. Duration of vibrations: 10 cycles on each of the mutually perpendicular axes. IEC 68 part 2-6 (sinusoidal) and IEC 721 3-3 class 3M4. Frequency cycles with a rate of change of 1 octave / minute: 2 ... 9 Hz, constant amplitude 3.5 mm; 10 ... 150 Hz, constant acceleration 1g; period of changes: 10 frequency cycles on each of 3 mutually perpendicular axes.
Shock loads IEC 68 Part 2-27: Half-sine shock with an acceleration of 15 g (peak value) for up to 11 ms
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