Ring Topology With One Controller - GE PACSystems RXi User Manual

Ring Topology with One Controller

11.3
The diagram below illustrates a simple ring topology with one RXi Controller node and three
IO-Devices on the same PROFINET network. In this example, the RXi Controller is
configured to be the Media Redundancy Manager and the IO-Devices, in this case VersaMax
and RX3i PNS modules, are configured to be Media Redundancy Clients.
As a Media Redundancy Manager, the PNC detects when the network ring has been broken
and repaired. Each time the PNC detects that the ring has been broken or repaired, a fault is
reported in in the CPU's I/O Fault Table. As a Media Redundancy Manager, the PNC detects
whether another Media Redundancy Manager is on the same ring. If more than one Media
Redundancy Manager is present on the same ring, the PNC logs an entry in the I/O Fault
Table. Upon detecting that there are no longer multiple Media Redundancy Managers on the
ring, the PNC also logs a fault in the I/O Fault Table to indicate that the invalid setup has
been resolved.
GFK-2816F
IO LAN 1
1 OK
2 LAN
3 STATUS
4 CONN
PNS001
TO INSTALL,
TORQUE TO
6 IN-LB.
ACTIVE
USB
IP ADDRESS
MAC ADDRESS
PORTS
FRONT
3 4
1 2
I O DEVICE
IO-Device
1
2
3
4
ACTIVE
USB
IP ADDRESS
MAC ADDRESS
PORTS
FRONT
3 4
1 2
I O DEVICE
August 2015
Chapter 11. PROFINET Redundant Media
RXi Controller Node
IO-Device
OK
LAN
STATUS
CONN
PNS001
TO INSTALL,
TORQUE TO
6 IN-LB.
IO-Device
221