5 Configuration and Startup
5.2 Configuration of LioN-P
PROFINET Modules in TIA Portal
Functions
>
Reset to factory settings
to reset the LioN-P module again to its original condition
5.2.7 Media Redundancy Protocol (MRP)
Redundant PROFINET communication can be implemented with the LioN-P
modules via a ring topology without the use of additional switches. A MRP
redundancy manager terminates the ring, detects individual failures, and
transmits the data packets on the redundant path in case of error.
The following conditions must be met to use MRP:
D
All devices must support MRP.
D
MRP must be enabled on all devices.
D
Connections to the devices are only possible via the ring ports. A mesh
topology is not permissible.
D
A max. of 50 devices are permissible in the ring.
D
All devices share the same redundancy domain.
D
One device must be configured as the redundancy manager.
D
All other devices must be configured as redundancy clients.
D
Prioritized boot (FSU) is permissible.
D
The response monitoring time for all the devices must be greater than the
reconfiguration time (typically 200 ms, min. 90 ms for LioN-P modules).
D
It is advisable to use automatic network settings on all devices.
When using MRP ring configuration it is advisable to use the PLC as a
redundancy manager and all the other devices as clients. To detect an
individual failure, the diagnostics alarms should be activated.
Technical Manual LioN-P PROFINET
Version 2.0 10/2017
35