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Media Redundancy Protocol (MRP)
6874_en_16
PHOENIX CONTACT
6-1
6
Media Redundancy Protocol (MRP)
6.1
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 suFL SWITCH MM HSpport the MRP client function. The ring is created using
dedicated ports. The MRP ports must be configured in the switch management. When
configured correctly, MRP offers a guaranteed maximum switch-over time of 200 ms.
Due to the flexible structure of the MMS or if using the FL SWITCH MCS 14TX/2FX, the two
required MRP ports can be configured on various interfaces and all transmission media can
be used for MRP. The redundancy manager is only available with the
"FL IF MEM 2TX-D/MRM" interface module (Order No. 2891770).
For the MCS, the necessary MRP manager function can be implemented with the "FL MEM
Plug/MRM" configuration memory (Order No. 2891275).
6.2
MRP manager
For the MMS/MCS, the MRP manager function is provided by an interface module/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" mode is not available and cannot be
selected.
–
If a manager function module is inserted during runtime or if it is already present during
the boot process, "MRP Manager" mode is available in the user interface or can be
accepted.
–
If a manager function module is present during the boot process and "MRP Manager"
mode is activated in the saved configuration of the MMS/MCS, the MRP manager
function is automatically enabled.
–
If no manager function module is present during the boot process and the MRP
manager is enabled in the saved configuration, the device activates a "safe state", in
which one of the ring ports is set to blocking mode to prevent loop generation. An error
message appears, which would also be displayed in the event of a ring error, informing
the user of this configuration error. After inserting the manager function module, the
manager can be reenabled manually or a reboot executed.
–
If a manager function module is removed during runtime, the MRP manager can no
longer be selected.
–
If a manager function module is removed while the MRP manager is active, the mode
remains active until the device is restarted or is switched to another mode (MRP client,
disabled).
Please note that MRP is disabled by default upon delivery.
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