GFK-2571N
May 2018
127
Chapter 6
Redundant Media
The PACSystems PROFINET Controller supports PROFINET Media Redundancy Protocol (MRP). The PROFINET
Controller can be used as either a Media Redundancy Manager or Media Redundancy Client on a redundant
media ring.
Media Redundancy enables the network to recover from a failure at any single network link or network node.
Because it operates transparently to applications using the network, no changes to the application are needed
to use media redundancy.
This chapter describes:
•
PROFINET Media Redundancy Protocol
•
MRP Performance
•
Ring Topology with One Controller
•
Ring Topology with Multiple Controllers
•
Setting Up Media Redundancy Protocol for a PROFINET IO-Controller
•
Sequence for Enabling Media Redundancy
•
Sequence for Replacing a Media Redundancy Manager
•
Procedure for Disabling Media Redundancy
The following table shows which PROFINET Scanners/Devices support MRP.
PROFINET Scanner/Device
Acronym
PROFINET Media Redundancy
Protocol (MRP)
RX3i CEP Carrier
RX3i CEP
√
RX3i Genius* Communications Gateway
RX3i GCG
√
PAC8000 PROFINET Scanner (PNS) Module
PAC8000 PNS
√
RSTi PROFINET Network Adaptor
RSTi PNS
RSTi-EP PROFINET Network Adaptor
RSTi-EP PNS
√
RX3i PROFINET Scanner (PNS) Module
RX3i PNS
√
VersaMax PROFINET Scanner (PNS) Module
Versamax PNS
√
VersaMax IP PROFINET Scanner Module
VersaMax/IP PNS
√
16
VersaPoint PROFINET Scanner
VersaPoint PNS
√
16
Bumpless operation is only guaranteed at IO Update rates at or above 128 ms