Belden 934 692-001, Technical Manual, Page: 36 / 64

Configuration and startup
36
5.5 Media Redundancy Protocol
(MRP)
Technical manual LioN-P/ -R PROFINET
Release 1.2 02/2016
 A max. of 50 devices are permissible in the ring.
 All devices share the same redundancy domain.
 One device must be configured as the redundancy manager.
 All other devices must be configured as redundancy clients.
 Prioritized boot (FSU) is permissible.
 The response monitoring time of all devices must be greater than the
reconfiguration time (typically 200 ms, min. 90 ms for LioN-P modules).
 It is recommended to use automatic network settings on all devices.
The following figures show a possible MRP ring configuration. The PLC is
used as the redundancy manager while all other devices are clients. To
detect an individual failure, it is advisable to use the diagnostics alerts.
Example of setting up the MRP redundancy manager in STEP7:
Example of setting up an MRP redundancy client in STEP7: