Siemens SIMATIC S7-1500, SIMATIC S7-1500R/H, SIMATIC ET 200SP, SIMATIC ET 200pro Function Manual

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SIMATIC

S7-1500 Isochronous mode

Function Manual

10/2018

A5E43884988

Preface

Documentation guide

What is isochronous mode?

Use of isochronous mode

Time sequence of synchronization

Configuring isochronous mode

Programming isochronous mode

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A5E43884988-AA

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Legal information

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NOTICE

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Qualified Personnel

personnel qualified

Proper use of Siemens products

WARNING

Siemens products may only be used for the applications described in the catalog and in the relevant technical

ambient conditions must be complied with. The information in the relevant documentation must be observed.

Trademarks

Disclaimer of Liability

This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger.

If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage.

The product/system described in this documentation may be operated only by task in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified personnel are those who, based on their training and experience, are capable of identifying risks and avoiding potential hazards when working with these products/systems.

Note the following:

documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems. The permissible

All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions.

for the specific

09/2018 Subject to change

Preface

Purpose of the documentation

Basic knowledge required

Scope

This function manual provides an overview of the isochronous mode function for I/O modules that you operate isochronously:

● As central I/O in a SIMATIC S7-1500

● In distributed I/O systems on PROFINET IO

● In distributed I/O systems on PROFIBUS DP

● Jointly as central and distributed I/O on PROFINET IO

The documentation supports you in the configuring and programming of isochronous mode.

The following knowledge is required in order to understand the manual:

● General knowledge of automation technology

● Knowledge of the industrial automation system SIMATIC

● Knowledge about the use of Windows-based computers

● Knowledge about how to use STEP 7 (TIA Portal)

This documentation is the basic documentation for the SIMATIC S7-1500 automation system and all SIMATIC products from the PROFINET and PROFIBUS environments. The product documentation is based on this documentation.

The manual applies to the SIMATIC S7-1500 automation system with CPUs Firmware Version V2.6 or higher (except S7-1500 Compact CPUs and S7-1500R/H CPUs). SIMATIC STEP 7 Professional V15.1 or higher is also required.

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Preface

Conventions

STEP 7:

Note

A note contains important information on the product, on handling of the product and section of the documentation to which you should pay particular attention.

Security information

programming software "STEP 7 as of V15.1 (TIA Portal)" and subsequent versions.

This documentation contains pictures of the devices described. The figures may differ slightly from the device supplied.

You should also pay particular attention to notes such as the one shown below:

Siemens provides products and solutions with industrial security functions that support the secure operation of plants, systems, machines and networks.

In order to protect plants, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art industrial security concept. Siemens' products and solutions constitute one element of such a concept.

Customers are responsible for preventing unauthorized access to their plants, systems, machines and networks. Such systems, machines and components should only be connected to an enterprise network or the internet if and to the extent such a connection is necessary and only when appropriate security measures (e.g. firewalls and/or network segmentation) are in place.

We refer to "STEP 7" in this documentation as a synonym for the configuration and

on the

For additional information on industrial security measures that may be implemented, please visit (https://www.siemens.com/industrialsecurity).

Siemens' products and solutions undergo continuous development to make them more secure. Siemens strongly recommends that product updates are applied as soon as they are available and that the latest product versions are used. Use of product versions that are no longer supported, and failure to apply the latest updates may increase customers' exposure to cyber threats.

To stay informed about product updates, subscribe to the Siemens Industrial Security RSS Feed under (https://www.siemens.com/industrialsecurity).

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Preface

Siemens Industry Online Support

Product support

Application examples

Services

Forums

mySupport

Industry Mall

You can find current information on the following topics quickly and easily here:

●

All the information and extensive know-how on your product, technical specifications, FAQs, certificates, downloads, and manuals.

●

Tools and examples to solve your automation tasks – as well as function blocks, performance information and videos.

●

Information about Industry Services, Field Services, Technical Support, spare parts and training offers.

●

For answers and solutions concerning automation technology.

●

Your personal working area in Industry Online Support for messages, support queries, and configurable documents.

This information is provided by the Siemens Industry Online Support in the Internet (https://support.industry.siemens.com).

The Industry Mall is the catalog and order system of Siemens AG for automation and drive solutions on the basis of Totally Integrated Automation (TIA) and Totally Integrated Power (TIP).

You can find catalogs for all automation and drive products on the Internet (https://mall.industry.siemens.com).

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Preface ................................................................................................................................................... 3

1 Documentation guide .............................................................................................................................. 7

2 What is isochronous mode? .................................................................................................................. 12

3 Use of isochronous mode...................................................................................................................... 15

4 Time sequence of synchronization ........................................................................................................ 17

5 Configuring isochronous mode .............................................................................................................. 22

6 Programming isochronous mode ........................................................................................................... 43

Glossary ............................................................................................................................................... 49

Index .................................................................................................................................................... 54

4.1 Time sequence of synchronization on PROFINET IO and PROFIBUS DP........................... 17

4.2 Time sequence of synchronization in the central configuration ............................................. 19

5.1 Configuring isochronous mode for distributed I/O on PROFINET IO .................................... 24

5.2 Configuring isochronous mode for central I/O in S7-1500 ..................................................... 26

5.3 Configuring joint isochronous operation of central and distributed I/O .................................. 30

5.4 Configuring isochronous mode for distributed I/O on PROFIBUS DP ................................... 32

5.5 Configuring isochronous mode for a Motion Control application ........................................... 34

5.6 Setting the application cycle and delay time .......................................................................... 41

6.1 Program execution according to the IPO model .................................................................... 44

6.2 Program execution according to the OIP model .................................................................... 46

6.3 Programming of isochronous mode for Motion Control applications ..................................... 48

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Basic information

Device information

The documentation for the SIMATIC S7-1500 automation system, for CPU 1516pro-2 PN based on SIMATIC S7-1500, and for the distributed I/O systems SIMATIC ET 200MP, ET 200SP and ET 200AL is divided into three areas. This division allows you easier access to the specific information you require.

System manuals and Getting Started manuals describe in detail the configuration, installation, wiring and commissioning of the SIMATIC S7-1500, ET 200MP, ET 200SP and ET 200AL systems; use the corresponding operating instructions for CPU 1516pro-2 PN. The STEP 7 online help supports you in configuration and programming.

Product manuals contain a compact description of the module-specific information, such as properties, terminal diagrams, characteristics and technical specifications.

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Documentation guide

General information

Manual Collections

"mySupport"

"mySupport" - Documentation

The function manuals contain detailed descriptions on general topics such as diagnostics, communication, Motion Control, Web server, OPC UA.

You can download the documentation free of charge from the Internet (https://support.industry.siemens.com/cs/ww/en/view/109742705).

Changes and additions to the manuals are documented in product information sheets.

You will find the product information on the Internet:

● S7-1500/ET 200MP (https://support.industry.siemens.com/cs/us/en/view/68052815)

● ET 200SP (https://support.industry.siemens.com/cs/us/en/view/73021864)

● ET 200AL (https://support.industry.siemens.com/cs/us/en/view/99494757)

The Manual Collections contain the complete documentation of the systems put together in one file.

You will find the Manual Collections on the Internet:

● S7-1500/ET 200MP (https://support.industry.siemens.com/cs/ww/en/view/86140384)

● ET 200SP (https://support.industry.siemens.com/cs/ww/en/view/84133942)

● ET 200AL (https://support.industry.siemens.com/cs/ww/en/view/95242965)

With "mySupport", your personal workspace, you make the best out of your Industry Online Support.

In "mySupport", you can save filters, favorites and tags, request CAx data and compile your personal library in the Documentation area. In addition, your data is already filled out in support requests and you can get an overview of your current requests at any time.

You must register once to use the full functionality of "mySupport".

You can find "mySupport" on the Internet (https://support.industry.siemens.com/My/ww/en).

In the Documentation area in "mySupport" you can combine entire manuals or only parts of these to your own manual. You can export the manual as PDF file or in a format that can be edited later.

You can find "mySupport" - Documentation on the Internet (https://support.industry.siemens.com/My/ww/en/documentation).

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Documentation guide

"mySupport" - CAx data

Application examples

TIA Selection Tool

In the CAx data area in "mySupport", you can access the current product data for your CAx or CAe system.

You configure your own download package with a few clicks.

In doing so you can select:

● Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN macro files

● Manuals, characteristics, operating manuals, certificates

● Product master data

You can find "mySupport" - CAx data on the Internet (https://support.industry.siemens.com/my/ww/en/CAxOnline).

The application examples support you with various tools and examples for solving your automation tasks. Solutions are shown in interplay with multiple components in the system separated from the focus on individual products.

You will find the application examples on the Internet (https://support.industry.siemens.com/sc/ww/en/sc/2054).

With the TIA Selection Tool, you can select, configure and order devices for Totally Integrated Automation (TIA). This tool is the successor of the SIMATIC Selection Tool and combines the known configurators for automation technology into one tool. With the TIA Selection Tool, you can generate a complete order list from your product selection or product configuration.

You can find the TIA Selection Tool on the Internet (https://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).

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Documentation guide

SIMATIC Automation Tool

PRONETA

You can use the SIMATIC Automation Tool to run commissioning and maintenance activities simultaneously on different SIMATIC S7 stations as a bulk operation, independently of the TIA Portal.

The SIMATIC automation tool provides a variety of functions:

● Scanning of a PROFINET/Ethernet plant network and identification of all connected CPUs

● Address assignment (IP, subnet, gateway) and station name (PROFINET device) to a

CPU

● Transfer of the date and programming device/PC time converted to UTC time to the module

● Program download to CPU

● Operating mode switchover RUN/STOP

● CPU localization by means of LED flashing

● Reading out CPU error information

● Reading of CPU diagnostic buffer

● Reset to factory settings

● Updating the firmware of the CPU and connected modules

You can find the SIMATIC Automation Tool on the Internet (https://support.industry.siemens.com/cs/ww/en/view/98161300).

With SIEMENS PRONETA (PROFINET network analysis), you analyze the plant network during commissioning. PRONETA features two core functions:

● The topology overview independently scans PROFINET and all connected components.

● The IO check is a fast test of the wiring and the module configuration of a plant.

You can find SIEMENS PRONETA on the Internet (https://support.industry.siemens.com/cs/ww/en/view/67460624).

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Documentation guide

SINETPLAN

SINETPLAN, the Siemens Network Planner, supports you in planning automation systems and networks based on PROFINET. The tool facilitates professional and predictive dimensioning of your PROFINET installation as early as in the planning stage. In addition, SINETPLAN supports you during network optimization and helps you to exploit network resources optimally and to plan reserves. This helps to prevent problems in commissioning or failures during productive operation even in advance of a planned operation. This increases the availability of the production plant and helps improve operational safety.

The advantages at a glance

● Network optimization thanks to port-specific calculation of the network load

● Increased production availability thanks to online scan and verification of existing systems

● Transparency before commissioning through importing and simulation of existing STEP 7

projects

● Efficiency through securing existing investments in the long term and optimal exploitation

of resources

You can find SINETPLAN on the Internet (https://www.siemens.com/sinetplan).

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Objectives of isochronous operation

The advantages of the isochronous mode function in automation engineering can be seen in an example from everyday life.

The transmission of data corresponds to the transport of people on public transport. Assuming public transport were to operate at maximum speed while reducing stop times at the passenger terminals to absolute minimum, the last thing many potential passengers would notice of the departing contraption are its red tail lights. The overall travel time is, however, decided by the train, bus or underground-railway clock, because well adjusted timing is essential to a good service. This also applies in automation engineering. Not only fast cycles but also the coordination and synchronization of the individual cycles result in optimum throughput.

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What is isochronous mode?

Just-In-Time

Figure 2-1 System cycle

The fast and reliable reaction time of a system operating in isochronous mode is based on the fact that all data are provided just-in-time. The basis for this is a constant bus cycle.

The isochronous mode function guarantees synchronization of the following at constant time intervals:

● Signal acquisition and output by the central and distributed I/O

● Signal transmission via backplane bus, PROFINET IO or PROFIBUS DP

● Program execution in the CPU in local time, in time with the constant bus cycle time

PROFINET IO or PROFIBUS DP

The result is a system that acquires its input signals, processes them and outputs the output signals at constant time intervals. Isochronous mode guarantees precisely reproducible and defined process reaction times as well as constant bus cycle and synchronous signal processing for central and distributed I/O.

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What is isochronous mode?

Advantages of isochronous mode

The use of isochronous mode enables high-precision control loops.

● Optimized control loops through constant, calculable dead times

● Determinism, reliable reproducibility of reaction times

● Consistent (simultaneous) reading in of input data

● Consistent (simultaneous) output of output data

● Oversampling for processing of fast processes thanks to higher sampling rates than the

send clock permits

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An isochronous system acquires measured values and process data within a fixed system cycle, processes the signals and outputs them synchronously to the process. Isochronous mode contributes to a high control quality and increased production accuracy. With isochronous mode, the possible fluctuations of process reaction times are drastically reduced. You make use of the time-assured processing to improve machine cycle times. Even fast processes can be reliably controlled thanks to the precise time reproducibility of all sequences. Shorter cycle times increase the processing speed and help to lower production costs.

In principle, isochronous mode lends itself to being used whenever measured values must be acquired synchronously, movements must be coordinated, and process responses must be defined and carried out simultaneously. There are thus numerous applications for isochronous mode.

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Use of isochronous mode

Example: Measuring at multiple measurement points with isochronous mode

Automation task

Feature

Solution

Advantage and benefits

A camshaft production process requires precise measurement of the camshafts for quality assurance purposes.

For this purpose, a component is needed that can synchronously measure the positions and displacements of the cam during a rotation of the camshaft.

Figure 3-1 Measuring of camshafts

With use of isochronous mode, the measured values are simultaneously acquired at the various measuring points at fixed times. This yields the following sequence of operations:

● Continuously rotate the camshaft

● During the continuous rotation, synchronously measure the positions and cam

displacements

● Process the next cam shaft

Thus, during a single rotation of the camshaft, all the positions of the camshaft and the associated measured values (red) are measured synchronously. The machine cycle time improves with the same or better measuring accuracy.

The time required for measurement is reduced.

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+ 38 hidden pages

Siemens SIMATIC S7-1500, SIMATIC S7-1500R/H, SIMATIC ET 200SP, SIMATIC ET 200pro Function Manual

Legal information

Preface

Table of contents