Usb Port - GE VersaMax GFK-2721A Manual

1
Media Redundancy Protocol Support
PROFINET Media Redundancy Protocol (MRP) supports devices configured in a ring topology.
It is based on the functions of IEC62439. Media Redundancy Protocol is not routable between
different IP subnets.
Each device within a Redundant Media network has at least two physical pathways to two other
devices on the network. To connect to the ring, each device requires an integrated switch with
at least two external ports (ring ports) that support Media Redundancy Protocol. Devices that
are not MRP-capable can be connected to a device like an MRP-capable switch in the ring, but
they cannot be in the ring themselves. The redundant paths only extend to the devices on the
ring that are MRP-capable and enabled.
One of the devices on the ring must be configured as the Media Redundancy Manager (MRM),
and all the other devices must be configured as Media Redundancy Clients (MRCs). The PNS
can be configured to be an MRC. Configuring the PNS as an MRC alters how the Ethernet ports
connect to the network. They attempt to indicate their state to the MRM before allowing traffic to
flow between the ports and close the ring topology through the internal switch. They also send
out notifications to the MRM when a port is lost. Operation of the PNS is otherwise unchanged.

USB Port

The USB port, located behind the hinged door on the front of the PROFINET Scanner, can be
used to connect a computer for firmware updates for the PROFINET Scanner, and for modules
in the remote node that support indirect firmware updates. The USB port accepts a standard
USB cable (USB Micro B Male to USB Type A Male, not included). The port must be set up
before using it, as described in chapter 2.
Note:
The USB port is for firmware upgrades only. It is not intended for permanent connection.
GFK-2721A Chapter 1 Introduction 1-11