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Configuration and diagnostics
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“Memory Module” menu
Figure 5-8 “Memory Module” web page
5.2 Media Redundancy Protocol (MRP)
5.2.1 General function
Loops A ring can be created in the network using MRP according to IEC 62439 and a redundant
connection provided. Each ring must contain an MRP manager, all other devices (in the
ring) must support the MRP client function. The ring is created using dedicated ports. The
MRP ports must be configured in the switch management. When configured correctly, e.g.,
a maximum of 50 switches in the ring and one switch defined as MRP manager, MRP offers
a guaranteed maximum switch-over time of 200 ms.
For the switch, the necessary MRP manager function can be implemented with the “FL
MEM PLUG/MRM” configuration memory (Order No. 2891275).
5.2.2 MRP manager
With regard to the switch, the MRP manager function is integrated with the help of an MEM
plug. Since the manager function is linked to a replaceable module, the following options are
available:
– If no manager module is present, “MRP Manager” operating mode is not available or
cannot be selected.
– If a manager function module is inserted during runtime or if it is already present during
the boot process, “MRP Manager” operating mode is available or accepted in the user
interfaces.
– If a manager function module is present during the boot process and “MRP Manager”
operating mode is activated in the saved switch configuration, the MRP manager func-
tion is automatically enabled.
Please note that MRP is disabled by default upon delivery.