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PROFINET general -- Configuring and programming communication -- Using communication blocks
In the user program of an S7-300 or S7-400 CPU with integrated PN interface, how can you read out the current topology of the PROFINET IO system connected?
Which entries deal with consistent data in conjunction with distributed I/O?
S7-300 CPU 31x -- Configuring and programming communication -- Configuring PROFINETinterfaces
In the user program, how do you read out the Link State of the PROFINET interface of a S7-300 CPU?
Which settings do you have to make in the TIA Portal to read out messages and status information over the CPU's web server and display them in the web browser?
How do you display the diagnostics buffer of a SIMATIC CPU with integrated web server on a SIMATIC Panel?
Which "local_device_id" do you parameterize in order to establish a connection to FB65 "TCON" for open communication via Industrial Ethernet?
How do you reset the IP address and device name of an I device?
Why is the message "This page is not available" displayed in the web browser when you call the HTML page "Topology", for example, to read out the topology via the web server of the CPU?
How do you activate the "Prioritized OCM communication" function to improve the OP communication performance?
What should you watch out for when parameterizing the watchdog time when a ring redundancy is established with the Media Redundancy Protocol?
Which CPU can you operate as a PROFINET I device?
What should you watch out for with a remote access to a SIMATIC S7 with STEP 7 via the Internet?
In the user program of an S7-300 or S7-400 CPU with integrated PN interface, how can you read out the current topology of the PROFINET IO system connected?
Where can you find sample S7 programs and documentation for communication via PROFINET on the SIMATIC NET Quick Start Collection?
What differences are there when configuring S7 connections?
Which settings are required to access the web server of the CPU via a PC with a second network card even though a proxy server is set?
Can you implement an S7 317-2 PN/DP CPU instead of an S7 315-2 PN/DP CPU configured in iMap?
How do you read data consistently from a DP standard slave/PROFINET IO device and write it consistently to a DP standard slave/PROFINET IO device?
What can you do when communication errors occur sporadically with a PROFINET interface of the S7 300 CPU 31x-2 PN/DP?
From which library should you take the communications FBs?
What are the commonalities and differences between configured communication connections and the open Ethernet communication?
What are the differences when assigning the MAC address?
S7-400 CPU 41x -- Configuring and programming communication -- Configuring the PROFINET interface
Which settings do you have to make in the TIA Portal to read out messages and status information over the CPU's web server and display them in the web browser?
Why is the "Certificate error" message shown in the address line when downloading the web page of an S7-300/400/1200 CPU over "https://..."?
How do you display the diagnostics buffer of a SIMATIC CPU with integrated web server on a SIMATIC Panel?
Which "local_device_id" do you parameterize in order to establish a connection to FB65 "TCON" for open communication via Industrial Ethernet?
Why is the message "This page is not available" displayed in the web browser when you call the HTML page "Topology", for example, to read out the topology via the web server of the CPU?
How do you reset the IP address and device name of an I device?
What should you watch out for when parameterizing the watchdog time when a ring redundancy is established with the Media Redundancy Protocol?
Which CPU can you operate as a PROFINET I device?
What should you watch out for with a remote access to a SIMATIC S7 with STEP 7 via the Internet?
In the user program of an S7-300 or S7-400 CPU with integrated PN interface, how can you read out the current topology of the PROFINET IO system connected?
Where can you find sample S7 programs and documentation for communication via PROFINET on the SIMATIC NET Quick Start Collection?
Which settings are required to access the web server of the CPU via a PC with a second network card even though a proxy server is set?
What differences are there when configuring S7 connections?
How do you read data consistently from a DP standard slave/PROFINET IO device and write it consistently to a DP standard slave/PROFINET IO device?
In the user program of an S7-300 or S7-400 CPU with integrated PN interface, how can you read out the current topology of the PROFINET IO system connected?
Part number:

Description:
In this entry, we show you how to read out the current topology of the PROFINET IO system connected in the user program of an S7-300 or S7-400 CPU with integrated PN interface.
This is needed in plants where tools are used at different points in the plant, for example, and the interconnection of the PROFINET IO nodes thus changes.

You can read out the neighbor information of ports with SFB52 "RDREC" using data record number 802A (hex). In this way, you determine the topology data of the PROFINET IO nodes. You can evaluate and process this data in the user program.

A description and sample program for parameterizing the SFB52 "RDREC" are available below for downloading.

Description:
38566021_NET_topology_SFB52_e.pdf ( 471 KB )

Sample program:
The sample program is a STEP 7 project that contains the complete hardware configuration including the user program of an S7-300 station. The STEP 7 project is available for downloading as a ZIP file.
Extract the "PNIO_SFB52.zip" file into a separate directory. The STEP 7 project is unpacked automatically with all its subdirectories. You can then use the SIMATIC Manager to open and process the extracted STEP 7 project.

PNIO_SFB52.zip ( 512 KB )

Keywords:
LLDP, Link Layer Discovery Protocol

 Entry ID:38566021   Date:2009-10-05 
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