Siemens SIMATIC NET S7-400 User Manual

Performance data
2.3 SEND/RECEIVE interface
CP 443-1 (EX30)
Manual, 03/2019, C79000-G8976-C255-05
21
2.3
SEND/RECEIVE interface
2.3.1
Characteristic data
The SEND/RECEIVE interface provides access to communication using TCP, ISOonTCP,
ISO transport, email, and UDP connections. The following characteristics are important:
Characteristic
Explanation / values
Number of SEND/RECEIVE connections
• TCP connections: 1...64
1)
• ISO-on-TCP connections: 1...64
• ISO transport connections: 1...64
• Total number of UDP connections (specified and free) that can be
configured: 1 to 64 (of those up to 48 in multicast mode)
• Max. number of connections in total: Max. 64
(ISO transport + ISO-on-TCP + TCP + UDP)
Refer to the example in the section General characteristic data (Page 19).
1)
Note on TCP connections: Avoiding receive overload
The flow control on TCP connections cannot control permanent overload
of the recipient. You should therefore make sure that the processing ca-
pabilities of a receiving CP are not permanently exceeded by the sender
(approximately 150200 messages per second).
Number of SEND/RECV connections in
SPEED SEND/RECV mode
The number depends on the CPU type being used.
• Per CPU 412/414 maximum 30
• Per CPU 416/417 maximum 62
Maximum data length for AG_SEND and
AG_RECV program blocks
AG_SEND and AG_RECV were shipped with predecessors of the CP and
allow the transfer of user data with a length from 1 to 240 bytes. The
version of the CP described here continues to support these blocks.
Maximum data length for AG_LSEND and
AG_LRECV program blocks
AG_LSEND and AG_LRECV allow the transfer of user data with the fol-
lowing lengths:
• ISO-on-TCP, TCP, ISO transport: 1 to 8192 bytes
• UDP: 1 to 2048 bytes
• E-mail (job header + user data): 1 to 8192 bytes

Siemens SIMATIC NET S7-400 Specifications

General

Brand	Siemens
Model	SIMATIC NET S7-400
Category	Conference System
Language	English

Summary

Properties and Services

CP Core Properties

Details the intended use and interfaces of the Communications Processor (CP).

Enhanced Functions and Compatibility

Covers advanced features and compatibility with older CP modules and firmware versions.

Communication Services Overview

Lists and explains the various communication services supported by the CP.

Additional CP Features and Characteristics

Describes further services and characteristics like media redundancy and time synchronization.

Performance Data

General Performance Characteristics

Provides an overview of general performance data and connection limits.

S7 Communication Performance

Details the performance characteristics of S7 communication protocols.

SEND/RECEIVE Interface Performance

Covers data lengths, connection limits, and call capacities for the SEND/RECEIVE interface.

PROFINET IO and TCP/IP Performance

Outlines performance data for PROFINET IO and TCP/IP communication.

Integrated 2-Port Switch Performance

Describes performance characteristics of the integrated 2-port Ethernet switch.

Requirements for Use

Configuration Limits and System Environment

Specifies configuration limits and system environment requirements for the CP.

Project Engineering and Programming

Details project engineering steps and programming interfaces for the CP.

LEDs

LED Display and Meaning

Explains the front panel LEDs, their display patterns, and meanings for status indication.

Installation and Commissioning

Important Safety and Usage Notes

Covers safety requirements for installation, use in hazardous areas, and power supply.

Installation Procedure

Step-by-step guide for physically installing the CP into the rack and connecting it.

Commissioning Procedure

Outlines the process for configuring and downloading data to the CP.

Configuration and Operation

Security Recommendations

Best practices for system security, physical access, and network protection.

Operating Modes and Load Management

Covers controlling the CP's operational mode and recommendations for high communication loads.

Protection Levels and Configuration

Explains the effects of protection levels and the process for configuring the CP.

Interface Configuration and Settings

Details interface configuration for Ethernet, IP, and network settings.

Diagnostics and Upkeep

Diagnostics Methods (LEDs, Web Server, STEP 7)

Details available diagnostics methods, including LEDs, Web diagnostics, and STEP 7 tools.

Module Replacement and Upgrading

Guides on replacing older modules, covering module replacement and upgrading procedures.

Firmware Updates and Reset Procedures

Covers loading new firmware and procedures for memory reset and factory defaults.

Technical Specifications

Hardware Specifications and Environmental Data

Lists article numbers, Ethernet attachment, electrical data, and ambient conditions.

Design, Dimensions, and Product Functions

Details physical dimensions, weight, module format, and overall product functions.

Certification

Regulatory Compliance and Approvals

Covers EC declarations, ATEX, IECEx, EMC, RoHS, UL, FM, and other regional certifications.

Documentation References

Introduction to Documentation and Finding Information

Guides on locating Siemens documentation, article numbers, and manuals online.

Configuring, Commissioning, and Using the CP Documentation

References for configuring, commissioning, and using the CP, including general applications and history.

Installing and Commissioning the CP Documentation

References for installing and commissioning the CP, including installation and module data.

Configuration with STEP 7 and NCM S7 References

Guides for configuring the CP using STEP 7 and NCM S7, including programming.

PROFINET IO Application and Configuration References

References for applying and configuring PROFINET IO systems.

Industrial Ethernet Network Operation References

Information on setting up and operating Industrial Ethernet networks.