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Industrial Ethernet S7-300/400 CPs -- Setting up and parameterizing hardware -- Initializing and parameterizing modules
Why is there no entry with the current firmware version for my module in the STEP 7 hardware catalog?
What should you watch out for when a MAC address is entered for the PROFINET interface or GBIT interface in the configuration of the Industrial Ethernet CP343-1/CP443-1?
How do you configure a shared device when you are using a CPx43-1 Advanced as PROFINET IO controller and the GBIT interface of the module is networked?
Which "local_device_id" do you parameterize in order to establish a connection to FB65 "TCON" for open communication via Industrial Ethernet?
Which Industrial Ethernet CPs support the DHCP Option 12 (Host Name) and how do you configure the DHCP Option 12?
What should you watch out for when parameterizing the watchdog time when a ring redundancy is established with the Media Redundancy Protocol?
How do you use an Industrial Ethernet CP or SCALANCE S as a gateway?
How do you disable the "Link Layer Discovery Protocol" function at the ports of an IE CP of S7-300 or S7-400?
Where can you find sample S7 programs and documentation for communication via gateways and network components, and for security in networks on the SIMATIC NET Quick Start Collection?
What should you watch out for when operating a CP443-1EX20 V2.0 on a CPU V5.1?
Changing the configuration data of users for CP 343-1 IT and CP 443-1 IT
Loading the configuration via LAN into the IE-CP in "STOP" mode
Special points when setting the LAN medium for Industrial Ethernet CPs
Starting up automation systems with Industrial Ethernet without previous node initiation via MPI
Rejected diagnostics connection via TCP/IP protocol after changing the MAC address
Establishing an online connection to an S7-300/S7-400 CPU through several Ethernet interfaces
What should you pay attention to when formatting the file system in the S7-300 and S7-400 Industrial Ethernet CPs?
What should you watch out for when replacing the CP443-1 (6GK7443-1EX11-0XE0) with a CP443-1 (6GK7443-1EX20-0XE0 V1.0) in STEP 7 V5.4 SP3?
What is the meaning of the configuration option "Activate Web server" with CP443-1 EX20?
Why with CP443-1 Advanced is a different firmware version than the module displayed in the C-PLUG info text in the NCM S7 Diagnostics?
Which options are available for assigning the PROFINET IO controller a new IP address?
How can you configure an S7 CP during runtime?
How do you disable the S7 routing functions?
Which manufacturer ID, in other words OUI (Organizationally Unique Identifier), does SIEMENS AG use for the MAC addresses of network-compatible devices?
How can you protect the S7-300/400 against unauthorized access from the LAN (local area network)?
What should you watch out for when using the function block FB55 "IP_CONFIG" to configure an Industrial Ethernet CP?
Why are some of the newer versions of the names of SIMATIC NET modules not used in the hardware catalog?
Why can't my SIMATIC S7-300 Ethernet CP run as many S7 communication connections as specified?
How does connection multiplexing work and how do you configure it for SIMATIC S7-300 Ethernet CPs?
PROFINET general -- Setting up and parameterizing hardware -- Initializing and parameterizing modules
How can you standardize and destandardize analog values with STEP 7 V5.5?
How do you configure a shared device when you are using a CPx43-1 Advanced as PROFINET IO controller and the GBIT interface of the module is networked?
What should you watch out for when you configure the I device and the higher-level IO controller in the same STEP 7 project?
How do you configure the SIMATIC MV440 / MV420 code reader device with STEP 7 (TIA Portal) as a PROFINET IO device on the PROFINET IO system of a SIMATIC S7-300?
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?
What should you watch out for in the configuration when data is exchanged via Industrial Ethernet in parallel via I/O addresses and TCP and UDP connections?
How do you configure the SIMATIC MV440 code reading system as PROFINET IO device on the PROFINET IO system of a SIMATIC S7-300?
Assigning names and addresses in PROFINET IO
Which options are available for configuring the ET 200 stations?
How do you connect the SIMATIC Field PG to the bus system to parameterize and diagnose the distributed I/O devices?
Industrial Ethernet network components (electrical/optical) -- Setting up and parameterizing hardware -- Initializing and parameterizing modules
How do you incorporate the current version of your Scalance X 200 switch in STEP 7 through GSDML?
What options do you have for connecting an (R)STP segment to a ring structure and how can you reduce the ring reconfiguration time through the EPLC procedure?
What should you watch out for when configuring a Link Aggregation between SCALANCE X switches and RuggedCom switches?
Where can you find sample programs and documentation for communication between a PC station and SIMATIC S7 via Industrial Ethernet and incorporating network components?
Which GSDML file can you use with the firmware version installed in SCALANCE X?
What should you watch out for when parameterizing the watchdog time when a ring redundancy is established with the Media Redundancy Protocol?
Which settings have to be complied with in a PROFINET RT network in conjunction with VLAN switches?
Routing of S7 and of Data Sets (PROFIBUS DP) via the Link Gateway IE/PB
How do you transmit the diagnostics data of an OSM, ESM or SCALANCE to the TFTP server using the Trivial File Transfer Protocol (TFTP)?
Where can you find sample S7 programs and documentation for communication via gateways and network components, and for security in networks on the SIMATIC NET Quick Start Collection?
Login window of the "Web Based Management" remains permanently active
What options do I have to insert a C-PLUG or what is the purpose of a C-PLUG?
Which Industrial Ethernet switches can be operated as redundancy managers and which as standby managers in a ring?
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?
What should you watch out for when parameterizing the watchdog time when a ring redundancy is established with the Media Redundancy Protocol?
Part number:

Description
The media redundancy function ensures network and plant availability. Redundant transmission paths (ring topology) ensure that when one transmission path fails an alternative path is made available.

The Media Redundancy Protocol (MRP) is a component of the PROFINET standardization in compliance with IEC 61158. An overview of the PROFINET IO controllers and IO devices that support the Media Redundancy Protocol and for which the Media Redundancy Protocol can be enabled is available in Entry ID: 44383954.

If one transmission path fails, reconfiguration of the network, i.e. switchover to the redundant transmission path, can take up to 200ms. 200ms is the maximum reconfiguration time for 50 devices in the ring.  
If the watchdog time of the PROFINET IO device is less than the switchover time, then it might happen that OB86 temporarily reports subrack failure/return.

Increase the watchdog time by

  • Increasing the update time or
  • Increasing the number of accepted update cycles with missing I/O data.

The watchdog time is the product of the parameters "Update time" and "Number of accepted update cycles with missing IO data". The watchdog time must be greater than 200ms to avoid module failure through redundancy switchover.

Follow the instructions below to increase the watchdog time.

  • Open the hardware configuration of the SIMATIC S7-300 station that is functioning as PROFINET IO controller.
  • Mark the PROFINET IO device in the hardware configuration. Double-click the PROFINET interface in the slot table of the PROFINET IO device to open the "Properties" dialog of the PROFINET interface.


Fig. 01

  • In the "Properties" dialog of the PROFINET interface, you switch to the "IO Cycle" tab.
  • Set the values for the "Update time" and "Number of accepted update cycles with missing IO data" parameters so that the watchdog time is greater than 200ms.


Fig. 02

Note
A sample application of ring redundancy with the Media Redundancy Protocol (MRP) is available in Entry ID: 33696406.

 Entry ID:46636225   Date:2010-11-26 
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