Media Redundancy Protocol (Mrp); Shared Device - Siemens SIMATIC ET 200SP Equipment Manual

Product overview
3.2 Functions
This function accelerates the startup of IO devices in the following cases:
• After recovery of supply voltage
• After station recovery
• After activation of IO devices
You can find more information on this topic in the STEP 7 online help and:
• As of STEP 7 V12, in the PROFINET with STEP 7
(https://support.industry.siemens.com/cs/ww/en/view/49948856) Function Manual.
• As of STEP 7 V5.5 in the PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127) System Manual.
3.2.7

Media redundancy protocol (MRP)

Media redundancy protocol (MRP)
MRP is a function for ensuring communication and plant availability. A ring topology ensures
that an alternative communication path is made available if a transmission route fails.
You can find additional information in the STEP 7 online help and as of STEP 7 (TIA Portal)
V12 in the PROFINET with STEP 7
(https://support.industry.siemens.com/cs/ww/en/view/49948856) function manual.
3.2.8

Shared device

Shared device
IO device which makes its data available to multiple IO controllers.
The interface module supports shared device at submodule level.
If there is no validity check of the shared device projects by the Engineering System,
note the following:
• Make sure the configurations are consistent. Assign each module or submodule to only
one IO controller. Multiple assignment causes errors because the module or submodule is
only available in the first controller.
• If you reconfigure the shared device configurations without the validity check mentioned
above, you must commission ET 200SP again. This means you must download the projects
of all involved IO controllers to the respective CPU again after reconfiguration. If
necessary, perform a POWER OFF/POWER ON of the interface module.
You can find more information on this topic in the STEP 7 online help and:
• As of STEP 7 V12 in the PROFINET with STEP 7 V13
(https://support.industry.siemens.com/cs/ww/en/view/49948856) Function Manual
• As of STEP 7 V5.5 in the PROFINET System Description
(http://support.automation.siemens.com/WW/view/en/19292127) system manual
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IM 155-6 PN ST Interface Module (6ES7155-6AU02-0BN0)
Equipment Manual, 11/2023, A5E53132379-AA