Siemens SIMATIC NET S7-400,SIMATIC NET CP 443-1 RNA User Manual

___________________

SIMATIC NET

S7-400 - Industrial Ethernet CP 443-1 RNA

Manual

Manual Part B

03/2019

C79000

Preface

Application and functions

Performance data

Requirements for use

LEDs

Installation, connecting up, commissioning

Configuration and operation

Upkeep and maintenance

Technical specifications

Approvals

PRP-compatible devices

Documentation references

-G8976-C299-04

Siemens AG Division Process Industries and Drives Postfach 48 48 90026 NÜRNBERG GERMANY

C79000-G8976-C299-04

Ⓟ

Legal information

Warning notice system

DANGER

indicates that death or severe personal injury will result if proper precautions are not taken.

WARNING

indicates that death or severe personal injury may result if proper precautions are not taken.

CAUTION

indicates that minor personal injury can result if proper precautions are not taken.

NOTICE

indicates that property damage can result if proper precautions are not taken.

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

03/2019 Subject to change

Preface

Legend:

①

X = placeholder for hardware product version

②

Firmware version

③

LEDs

④

Ethernet interface: Interface X1P1 with 1 x 8-pin RJ-45 jack

⑤

Designed for a redundant subnet

⑥

Label with MAC addresses

Validity and product names

RNA interface: Ports X2P1 / X2P2 with 2 x 8-pin RJ-45 jacks

Figure 1 CP 443-1 RNA

This description contains information on the following product

CP 443-1 RNA

Order number 6GK7 443-1RX00-0XE0

Hardware product version 1

CP 443-1 RNA Manual, 03/2019, C79000-G8976-C299-04

Preface

Note Names

•

New in this release

Replaced manual issue

Structure of the documentation

Current version of the manual and Information on the Internet

Firmware version V1.4.1

Communications processor for SIMATIC S7-400 / S7-400H

In this document, the term "CP" is used instead of the full product name. The name STEP 7 is used for the configuration tool instead of the names STEP 7 V5.5

and STEP 7 Professional.

● New ATEX/IECEx approval

● Editorial revision

Replaced manual edition 7/2017

The documentation for this device consists of the following parts:

● Manual Part A: Configuration manual "Configuring and Commissioning S7CPs for Industrial Ethernet", see references /1/ (Page 67).

● Manual Part B: Manual "CP 443-1 RNA" (this manual)

● Program blocks for SIMATIC NET S7 CPs - programming manual, see references /4/

(Page 68)

Contains the detailed description of the program blocks for the following services:

– Open communications services

– Access coordination with FETCH/WRITE

– Connection and system diagnostics

You will find the current version of this document and further information (e.g. FAQs) on using the CP on the Internet at the following address:

Link: (https://support.industry.siemens.com/cs/ww/en/ps/15355)

Select the appropriate entry type in the filter settings.

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Preface

CP documentation in the Manual Collection (order no. A5E00069051)

Compatibility with other modules - service and maintenance

Note

Read the information regarding extended functions and restrictions in section modules used with CP 443

Address label: Unique MAC address preset for the CP

License conditions

Note Open source software

Read the license conditions for open source software carefully before using the product. The acceptance of the disclaimers of liability and warranty it contains is a clear precondition of the use of open source software.

You will find the license condition following file name:

OSS_CP44x1RNA_86.pdf

Firmware

The "SIMATIC NET Manual Collection" DVD contains the device manuals and descriptions of all SIMATIC NET products current at the time it was created. It is updated at regular intervals.

Replacing the

-1 RNA (Page 52) of this manual!

The CP is supplied with a total of 2 default MAC addresses with the following assignment:

● Ethernet interface

● RNA interface

The two MAC addresses of the Ethernet interface and the RNA interface are printed on the housing.

If you configure a MAC address (ISO transport connections), we recommend that you use the MAC address of the relevant interface printed on the module for module configuration!

● This ensures that you assign a unique MAC address in the subnet!

● If you replace a module, the MAC address of the predecessor is adopted when you load

the configuration data; configured ISO transport connections remain operable.

s on the same data medium as this manual under the

CP 443-1 RNA Manual, 03/2019, C79000-G8976-C299-04

The firmware is signed and encrypted. This ensures that only firmware created by Siemens can be downloaded to the device.

Preface

Security information

Recycling and disposal

SIMATIC NET glossary

Training, Service & Support

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 only form one element of such a concept.

Customer is responsible to prevent unauthorized access to its plants, systems, machines and networks. Systems, machines and components should only be connected to the enterprise network or the internet if and to the extent necessary and with appropriate security measures (e.g. use of firewalls and network segmentation) in place.

Additionally, Siemens’ guidance on appropriate security measures should be taken into account. For more information about industrial security, please visit Link: (http://www.siemens.com/industrialsecurity)

Siemens’ products and solutions undergo continuous development to make them more secure. Siemens strongly recommends to apply product updates as soon as available and to always use the latest product versions. Use of product versions that are no longer supported, and failure to apply latest updates may increase customer’s exposure to cyber threats.

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

The product is low in pollutants, can be recycled and meets the requirements of the WEEE directive 2012/19/EU "Waste Electrical and Electronic Equipment".

Do not dispose of the product at public disposal sites. For environmentally friendly recycling and the disposal of your old device contact a certified disposal company for electronic scrap or your Siemens contact.

Keep to the local regulations.

You will find information on returning the product on the Internet pages of Siemens Industry Online Support: Link: (https://support.industry.siemens.com/cs/ww/en/view/109479891)

Explanations of many of the specialist terms used in this documentation can be found in the SIMATIC NET glossary.

You will find the SIMATIC NET glossary on the Internet at the following address:

Link: (https://support.industry.siemens.com/cs/ww/en/view/50305045)

You will find information on training, service and support in the multilanguage document "DC_support_99.pdf" on the Internet pages of Siemens Industry Online Support:

Link: (https://support.industry.siemens.com/cs/ww/en/view/38652101)

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6 Manual, 03/2019, C79000-G8976-C299-04

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

1 Application and functions ........................................................................................................................ 9

2 Performance data ................................................................................................................................. 17

3 Requirements for use ............................................................................................................................ 23

4 LEDs..................................................................................................................................................... 27

5 Installation, connecting up, commissioning ............................................................................................ 31

6 Configuration and operation .................................................................................................................. 37

1.1 Properties of the CP .................................................................................................................. 9

1.2 Communication services ......................................................................................................... 10

1.3 Network topology with redundancy (PRP) .............................................................................. 11

1.4 Further services and characteristics of the CP ....................................................................... 15

2.1 General characteristic data ..................................................................................................... 17

2.2 Characteristics of S7 communication ..................................................................................... 17

2.3 SEND/RECEIVE interface ...................................................................................................... 18

2.3.1 Characteristic data .................................................................................................................. 18

2.3.2 Number of simultaneous SEND/RECEIVE calls ..................................................................... 19

2.4 Characteristics of open TCP/IP communication ..................................................................... 21

2.5 Characteristic data of TCP connections for HTTP .................................................................. 21

3.1 Configuration limits ................................................................................................................. 23

3.2 System environment ............................................................................................................... 23

3.3 Project engineering ................................................................................................................. 25

3.4 Programming .......................................................................................................................... 25

5.1 Important notes on using the device ....................................................................................... 31

5.1.1 Notices on use in hazardous areas ........................................................................................ 31

5.1.2 Notices on use in hazardous areas according to ATEX / IECEx ............................................ 32

5.1.3 Notices on use in hazardous areas according to UL HazLoc ................................................. 33

5.2 Installation - procedure ........................................................................................................... 33

5.3 Commissioning - procedure .................................................................................................... 34

5.4 Replacing a module without a programming device ............................................................... 35

5.5 Controlling the mode ............................................................................................................... 36

6.1 Security recommendations ..................................................................................................... 37

6.2 Switching over interfaces ........................................................................................................ 40

6.3 Memory reset / reset to factory defaults ................................................................................. 40

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Table of contents

7 Upkeep and maintenance ..................................................................................................................... 51

8 Technical specifications ........................................................................................................................ 55

9 Approvals ............................................................................................................................................. 57

A PRP-compatible devices ....................................................................................................................... 63

B Documentation references .................................................................................................................... 67

Index .................................................................................................................................................... 71

6.4 Network settings..................................................................................................................... 42

6.4.1 Reserved MAC address ......................................................................................................... 42

6.4.2 Transmission properties of the Ethernet and RNA interfaces ............................................... 42

6.5 IP configuration ...................................................................................................................... 44

6.5.1 Setting the IP address ............................................................................................................ 44

6.5.2 Detecting duplicate IP addressing in the network .................................................................. 44

6.6 Time-of-day synchronization .................................................................................................. 45

6.7 Recommendation for use with a high communications load ................................................. 45

6.8 SNMP agent ........................................................................................................................... 46

6.9 Interface in the user program ................................................................................................. 48

6.9.1 Call interface for open communications services SEND/RECV ............................................ 48

6.9.2 Open TCP/IP communication ................................................................................................ 49

6.10 Ping: Permitted length of ICMP packets ................................................................................ 50

6.11 Communication in PRP mode ................................................................................................ 50

7.1 Loading new firmware ............................................................................................................ 51

7.2 Replacing the modules used with CP 443-1 RNA ................................................................. 52

B.1 Introduction to the documentation.......................................................................................... 67

B.2 On configuring, commissioning and using the CP ................................................................. 67

B.2.1 /1/ ........................................................................................................................................... 67

B.3 For configuration with STEP 7 / NCM S7 .............................................................................. 68

B.3.1 /2/ ........................................................................................................................................... 68

B.3.2 /3/ ........................................................................................................................................... 68

B.4 On programming (S7 CPs / OPC).......................................................................................... 68

B.4.1 /4/ ........................................................................................................................................... 68

B.4.2 /5/ ........................................................................................................................................... 68

B.4.3 /6/ ........................................................................................................................................... 69

B.4.4 /7/ ........................................................................................................................................... 69

B.4.5 /8/ ........................................................................................................................................... 69

B.4.6 /9/ ........................................................................................................................................... 69

B.5 S7 CPs On installing and commissioning the CP .................................................................. 70

B.5.1 /10/ ......................................................................................................................................... 70

B.6 On setting up and operating an Industrial Ethernet network ................................................. 70

B.6.1 /11/ ......................................................................................................................................... 70

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1.1

Properties of the CP

Application

The CP has the following interfaces:

Note Interfaces can only operated as alternatives

The Ethernet interface or the RNA interface can only be enabled as alternatives (one or the other). Simultaneous use of both interfaces is not possible. These are activated during configuration with STEP 7. Note further information in the section (Page

The CP is intended for use in an S7400 or S7400H (faulttolerant) automation system. It allows the S7400 / S7400H to be connected to Industrial Ethernet.

● Ethernet interface

The CP has a 100 Mbps Ethernet interface. The Ethernet interface can be used as an alternative to the RNA interface. The Ethernet interface can, for example, be used to connect to a PG/PC or to a higherlevel company network.

For special situations, each port can be set to a fixed mode manually using STEP 7, for example 10 or 100 Mbps half duplex / full duplex.

● RNA interface

The RNA interface has 2 ports. These two ports are used as follows:

– PRP mode with both ports as a redundancy solution

– Port 1 as the only used port of the RNA interface with 100 Mbps full duplex (port 2 is

disabled)

The RNA interface only supports the "automatic setting" mode with 100 Mbps full duplex. The communications partner must use the same settings.

Each port supports autocrossing and autonegotiation and is equipped with a combined RXD/TXD / LINK dual LED for simple diagnostics.

Switching over interfaces

40)

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Application and functions

①

Connection to port X1P1 of the Ethernet interface (ISO transport)

②

Connection of the RNA interface to a PRP network

③

Connection to port X2P1 of the RNA interface (ISO transport / ISO-on-TCP / TCP)

1.2

Communication services

S7 communication with the following functions:

Open communication services with the following functions:

1.1 Properties of the CP

Figure 1-1 CP 443-1 RNA - connection variants

Depending on the interface being used, the CP supports the following communications services:

●

– PG functions;

– Operator monitoring and control functions;

– Data exchange over S7 connections.

●

– SEND/RECEIVE interface over ISO transport connections;

– SEND/RECEIVE interface over TCP connections, ISOonTCP and UDP connections;

With the SEND/RECEIVE interface via TCP connections, the CP supports the socket interface to TCP/IP available on practically every end system.

UDP frame buffering on the CP can be disabled during configuration. When necessary, this allows you to achieve a shorter reaction time between the arrival of a UDP frame and its evaluation on the CPU.

– Multicast over UDP connection

The multicast mode is made possible by selecting a suitable IP address when configuring connections.

– FETCH/WRITE services (server services; corresponding to S5 protocol) via ISO

transport connections, ISOonTCP connections and TCP connections;

Here, the SIMATIC S7400 with the CP is always the server (passive connection establishment) while the fetch or write access (client function with active connection

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Application and functions

Open TCP/IP communication

Interfaces used and communications services

Communications service

Ethernet interface

RNA interface

functions (ISO)

x x

- x

Data exchange over S7 connections (ISO)

Data exchange over S7 connections (TCP)

ISO transport connections

tions

- x

Multicast over UDP connection

FETCH/WRITE services (ISO)

FETCH/WRITE services (RFC, TCP)

nication

- x

Time of day

NTP mode and SIMATIC mode

via ISO x x

via TCP - x

1.3

Network topology with redundancy (PRP)

Redundant Network Access (RNA)

1.3 Network topology with redundancy (PRP)

establishment) is always initiated by a SIMATIC S5 or a device from another range / PC.

– LOCK/UNLOCK with FETCH/WRITE services (CPUdependent; see section

Requirements for use (Page 23));

●

Open TCP/IP communication provides a program interface for the transfer of connectionoriented and connectionless services. The establishment and termination of connections is initiated here only via the "dynamic" program interface.

STEP 7 provides a UDT for the connection parameter assignment as well as four FBs for high-speed data exchange.

The CP supports communication via ISO-on-TCP connections for this interface.

The following table provides an overview of the services available at the interfaces.

S7 communication PG functions; operator control and monitoring

PG functions; operator control and monitoring functions (ISO-on-TCP)

Open communications services using SEND/RECEIVE interface

Open TCP/IP commu-

H connections

TCP connections, ISOonTCP and UDP connec-

In Siemens Industry, Redundant Network Access (RNA) stands for devices and software that support the redundancy protocol "Parallel Redundancy Protocol" (PRP). RNA allows the connection of devices to redundant Ethernet network structures.

The product names of the RNA devices end with "RNA".

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Application and functions

Parallel Redundancy Protocol (PRP)

Communication with PRP

1.3 Network topology with redundancy (PRP)

Some devices of the SCALANCE X-200RNA product line also support the redundancy protocol "High-availability Seamless Redundancy" (HSR).

The Parallel Redundancy Protocol (PRP) is a redundancy protocol for Ethernet networks. It is specified in IEC 62439-3.

The areas of application of PRP are distributed applications with high reliability demands that depend on the high availability of the network. Compared with classic fault-tolerant networks, bumpless path redundancy is possible with PRP.

PRP has the advantage that it uses parallel, separate networks made up of standard network components. End devices that use this method are connected to both networks via two ports of an interface of the device or via a SCALANCE X-200RNA or a RUGGEDCOM RS950G. This means that data of the end device can be transferred at the same time via both networks. If a transmission path is interrupted, the data reaches the communications partner via the second parallel path.

If a network is interrupted, communication can be maintained with PRP via the second network without any interruption. Reconfiguration times required with the other redundancy protocols (e.g. MRP) do not therefore apply.

An end device with PRP capability can be connected to redundant networks by using the PRP protocol. An end device that does not have PRP capability can be connected to a redundant network via a SCALANCE X-200RNA or RUGGEDCOM RS950G that does have PRP capability. This means that PRP can also be used by end devices without PRP capability.

Devices with PRP capability are located in two independent networks with the same MAC and IP address.

PRP is only possible when two end devices are connected via two independent networks (LAN A and LAN B).

Each end device is represented in both networks LAN A and LAN B with the same MAC and IP address.

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Application and functions

Send

Received

Connecting up and cabling

Note Cabling

Make sure that all the PRP ports of the nodes and the SCALANCE X204RNA / RUGGEDCOM RS950G on LAN A and LAN B are connected correctly. A frame with the identifier "LAN A" must be received at the corresponding port.

How is a redundant PRP network set up?

1.3 Network topology with redundancy (PRP)

PRP communication is handled using the following mechanisms:

●

An end device with PRP capability duplicates each frame to be sent on the PRP interface. The two duplicates are sent via the 2 ports of the PRP interface via the two separate networks LAN A and LAN B to the communications partner.

If the end device does not have PRP capability, the frame to be sent is duplicated by an X-200RNA to which the end device is connected and sent via LAN A and LAN B to the communications partner.

●

The two duplicates are received by an end device with PRP capability via LAN A and LAN B on the two ports of the PRP interface.

If the end device does not have PRP capability, the receiving end device must be preceded by an X-200RNA. The X-200RNA forwards the first frame to arrive to the addressee. The second frame is discarded ((N-1) redundancy).

Each frame duplicate sent using the PRP mechanisms is given in identifier that specifies whether it is sent via LAN A or LAN B.

The PRP ports of SIMATIC NET devices have the following identifiers. The CP ports are the ports of the interface with PRP capability.

● Ports for connection to LAN A

– CPs: X2/P1

– SCALANCE X204RNA: PRP A

● Ports for connection to LAN B

– CPs: X2/P2

– SCALANCE X204RNA: PRP B

A network topology in which the Parallel Redundancy Protocol is used (PRP network) consists of two separate Ethernet subnets. The structure of the two subnets does not need to be identical.

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Application and functions

Example of a configuration for a PRP network

1.3 Network topology with redundancy (PRP)

A PRP network can be set up both with end devices with PRP capability as well as with standard components. The following devices can be used:

● End devices with PRP capability (Double Attached Nodes PRP, Double Attached Node implementing PRP, DANP), for example:

– CP 443-1 RNA

– PC with SOFTNET-IE RNA

– SIPROTEC protective devices with PRP capability

● Standard components (Singly Attached Nodes, SAN)

Standard components without PRP functionality, for example, can be connected to a PRP network via SCALANCE X-200RNA or RuggedCom RS950G.

SANs can, however, also be connected to a PRP network without supporting the PRP functionality.

All devices that are intended to use the PRP function in redundant networks must be able to process frames with length of up to 1532 bytes (oversize frames). If this function is not supported, data may be lost.

The following figure shows the options for connecting devices in a network topology in which the Parallel Redundancy Protocol (PRP) is used.

Figure 1-2 Example of the configuration of a network topology with PRP

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Application and functions

1.4

Further services and characteristics of the CP

Timeofday synchronization over the RNA interface using the following configurable modes:

Addressable with the factoryset MAC address

SNMP agent on the RNA interface

Module access protection

IP access protection on the RNA interface (IPACL)

Web diagnostics on the RNA interface

Diagnostics buffer extract request

1.4 Further services and characteristics of the CP

●

– SIMATIC mode

– NTP mode (NTP: Network Time Protocol)

●

To assign the IP address to a new CP (direct from the factory), it can be accessed using the preset MAC address on port X2P1 of the RNA interface. Online address assignment is made in STEP 7.

The CP receives MMS timeofday messages and synchronizes its local time.

You can choose whether or not the time of day is forwarded. You can also decide on the direction in which it is forwarded.

The CP sends timeofday queries at regular intervals to an NTP server and synchronizes its local time of day.

The time can also be forwarded automatically to the CPU modules in the S7 station allowing the time to be synchronized in the entire S7 station.

●

The CP supports data queries over SNMP in version V1 (Simple Network Management Protocol). It delivers the content of certain MIB objects according to the MIB II standard (RFC 1213), PRP-MIB IEC62439 (IEC-62439-3-MIB) and Automation MIB.

●

To protect the module from accidental or unauthorized access, protection can be configured at various levels.

●

Using IP access protection gives you the opportunity of restricting communication over the CP of the local S7 station to partners with specific IP addresses.

●

With the aid of Web diagnostics, you can read out the diagnostics data from a station connected via the CP to a PG/PC with a Web browser.

The Web pages contain the following information:

– Module and status information

●

With the aid of a Web browser, the CP supports the option of obtaining an extract of the diagnostics buffer containing the most recent diagnostics events of the CPUs and CPs located in the same S7 station as the CP.

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Application and functions

Connection diagnostics with the AG_CNTEX program block

S5/S7 addressing mode

Detecting IP double addressing in the network on the RNA interface

Support in the fault-tolerant system (H system)

1.4 Further services and characteristics of the CP

●

With the AG_CNTEX program block, you can diagnose connections.

– When necessary, you can activate or deactivate connections or initiate

reestablishment of a connection.

– You can check the reachability of the connection partners using the PING function (on

the RNA interface).

– You can find out which connection types are set up on the RNA interface for the

SEND / RECEIVE function.

●

The addressing mode can be configured for FETCH/WRITE access as the S7 or S5 addressing mode (S7 addressing mode only for data blocks / DBs).

●

To save you timeconsuming troubleshooting in the network, the CP detects double addressing in the network.

For more detailed information, see section Detecting duplicate IP addressing in the network (Page 44)

●

S7 communication is supported in the H system with the following protocols:

– Ethernet interface

ISO transport

– RNA interface

ISO transport and ISO-on-TCP (RFC1006)

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2.1

General characteristic data

Characteristic

Explanation / values

Example

2.2

Characteristics of S7 communication

Characteristic

Explanation / values

of those max. 62 H connections

Total number of connections on Industrial Ethernet 128

The value applies to the total number of connections of the following types:

• S7 connections

• SEND/RECEIVE connections

You can, for example, operate the following combination of connections:

● 62 S7 connections or 62 H connections

● 30 ISO-on-TCP connections

● 10 TCP connections

● 10 UDP connections

● 8 ISO transport connections

S7 communication provides data transfer via the ISO Transport or ISO-on-TCP protocols.

Total number of S7 connections on Industrial Ethernet

LAN interface - data field length generated by CP per protocol data unit

• sending

• receiving

• Number of PG connections

• Number of OP connections

128 max.,

480 bytes / PDU 480 bytes / PDU

2 max.

30 max.

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Performance data

Note Effects of connections in the SPEED SEND/RECV mode

Note the effects of connections on the SEND/RECEIVE interface that are used in the SPEED SEND/RECEIVE mode.

The maximum configuration limits of S7 communic connection using the SPEED SEND/RECV mode.

2.3

SEND/RECEIVE interface

2.3.1

Characteristic data

The following characteristics are important:

Characteristic

Explanation / values

cannot

by the sender (approximately 150200 messages per second).

program blocks.

2.3 SEND/RECEIVE interface

ation are reduced by each configured

The SEND/RECEIVE interface provides access to communication over TCP, ISOonTCP, ISO transport and UDP connections.

Number of SEND/RECEIVE connections

Number of SEND/RECV connections in SPEED SEND/RECV mode

Maximum data length for AG_SEND and AG_RECV program blocks

• TCP connections: 1...64

• ISO-on-TCP connections: 1...64

• ISO transport connections: 1...64

• Total number of UDP connections (specified and free) that can be

• Max. number of connections in total:

Refer to the example in section 5.1 (Page 17) Notes:

•

The number depends on the CPU type being used.

• Per CPU 412/414 maximum 30

• Per CPU 416/417 maximum 62

AG_SEND and AG_RECV were shipped with other CPs of the S7-400 family and allowed the transfer of user data with a length of 1 to 240 bytes. The version of the CP described here continues to support these

configured: 1 to 64 (of those up to 48 in multicast mode)

(ISO transport and ISOonTCP

+ TCP + UDP) <= 64

Avoid overload at receiving end

The flow control on TCP connections load of the recipient. You should therefore make sure that the processing capabilities of a receiving CP are not permanently exceeded

control permanent over-

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Performance data

Characteristic

Explanation / values

2. UDP: 1 to 1452 bytes

Restrictions for UDP

2.3.2

Number of simultaneous SEND/RECEIVE calls

2.3 SEND/RECEIVE interface

Maximum data length for AG_LSEND and AG_LRECV program blocks

Maximum data length for AG_SSEND and AG_SRECV program blocks

LAN interface max. data field length generated by CP per protocol data unit

● Transfer is not acknowledged.

AG_LSEND and AG_LRECV allow the transfer of user data with the following lengths:

1. ISO-on-TCP, TCP, ISO transport: 1 to 8192 bytes

2. UDP: 1 to 2048 bytes

AG_SSEND and AG_SRECV allow the transfer of user data with the following lengths:

1. ISO-on-TCP, TCP, ISO transport: 1 to 1452 bytes

• sending

ISO transport, ISOonTCP, TCP: – 400 bytes / TPDU with AG_SEND / AG_LSEND – 1452 bytes / TPDU with AG_SSEND

• receiving – ISO transport: 512 bytes / TPDU – ISO-on-TCP: 1452 bytes / TPDU – TCP: 1452 bytes / TPDU

The transmission of UDP frames is unconfirmed, in other words the loss of messages is not detected or displayed by the send blocks (AG_SEND or AG_LSEND).

● No receipt of UDP broadcast

To avoid overload due to high broadcast load, the CP does not allow reception of UDP broadcasts.

As an alternative, use the multicast function over a UDP connection. This allows you to register the CP as a node in a multicast group.

● UDP frame buffering

Length of the frame buffer with buffering enabled:

2 KB

Note: Following a buffer overflow, newly arriving frames are discarded.

The number of SEND/RECEIVE calls that can be used at the same time is limited both by the CPU and by the CP.

If the maximum number of simultaneous SEND/RECEIVE calls is exceeded, the value 8302H (no receive resources) is indicated in the STATUS of the surplus SEND functions. This can, for example, happen when too many SEND/RECEIVE calls are sent at the same time in OB1.

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Performance data

Limitation by the CPU

Limitation by the CP

Number of simultaneous SEND calls

0 1 2

3, 4 5 6 7

8, 9 10

ous FC60s per CPU 412/414

2.3 SEND/RECEIVE interface

In productive operation, the number of SEND/RECEIVE calls that can be used at one time depends on the CPU resources being used. Note the information on the available CPU resources in section System environment (Page 23).

The following CPU resources are required:

● Per SEND job short (AG_SEND) or long (AG_LSEND): 1 resource

● Per RECEIVE job short (AG_RECV): 1 resource

● Per RECEIVE job long (AG_LRECV): 2 resources

● Per SPEED SEND/RECV job (AG_SSEND, AG_SRECV): 0 resources

A maximum of 64 SEND/RECEIVE connections can be operated by the CP.

At an assignment of 1 CP per CPU, the maximum number of SEND/RECEIVE calls that can be used at one time is limited as follows:

● SEND calls short (AG_SEND) or long (AG_LSEND): max. 32

● RECEIVE calls short (AG_RECV): max. 64

● RECEIVE calls long (AG_LRECV): variable

The higher values apply to the CPU 416 and CPU 417.

**)

The lower values apply to the CPU 412 and CPU 414.

***)

The number of AG_LRECV program blocks that can be used at the same time depends

/ 24

***)

**)

per CPU

on the number of SEND calls active at the same time (see tables below).

/ 12

**)

per CPU

Table 2- 1 Dependency of the maximum number of RECEIVE calls long (AG_LRECV FC60) used at the same time on

the number of SEND calls (CPU 412/414)

Max. number of simultane-

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19 18 17 16 15 14 13 12 11 10 9

Performance data

Number of simultaneous SEND calls

0 1 2

3, 4 5 6 7

8, 9 10

13,

CPU 416/417/41x-H

Number of simultaneous SEND calls

17 18, 19

20 21 22 23, 24

25 26 27 28, 29

30 31 32

CPU 416/417/41x-H

2.4

Characteristics of open TCP/IP communication

Characteristic

Explanation / values

trial Ethernet

Max. data length

1452 bytes

2.5

Characteristic data of TCP connections for HTTP

2.4 Characteristics of open TCP/IP communication

Table 2- 2 Dependency of the maximum number of RECEIVE calls long (AG_LRECV FC60) used at the same time on

the number of SEND calls (CPU 416/417)

Max. number of simultaneous FC60s per

51 50 49 48 47 46 45 44 43 42 41 40 39 38

37 36 35 34 33 32 31 30 29 28 27 26 25

The maximum number of SPEED SEND/RECEIVE calls that can be used simultaneously (FC53, FC63) depends only on the CPU (see above).

The CP supports communication via ISO-on-TCP connections for this interface.

Table 2- 3 Open TCP/IP communication

Number of dynamically generated connections over Indus-

For HTTP access, up to 4 CP-internal TCP connections are available. When necessary, these TCP connections are used by one or more Web browsers to display data of the CP.

CP-internal TCP connections do not affect the configuration limits of the configured TCP connection resources.

• ISO-on-TCP connections: 1...64

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Performance data

2.5 Characteristic data of TCP connections for HTTP

CP 443-1 RNA

22 Manual, 03/2019, C79000-G8976-C299-04

+ 50 hidden pages

Siemens SIMATIC NET S7-400,SIMATIC NET CP 443-1 RNA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Legal information

Preface

Table of contents

Properties of the CP

Communication services

1.3 Network topology with redundancy (PRP)

1.4 Further services and characteristics of the CP

General characteristic data

Characteristics of S7 communication

Characteristic data

2.3 SEND/RECEIVE interface

Number of simultaneous SEND/RECEIVE calls

Characteristic data of TCP connections for HTTP

2.4 Characteristics of open TCP/IP communication