GE PACSystems RX3i User Manual page 100

4.1.1.3 External Switch VLAN Priority Settings
The PROFINET-IO specification indicates the VLAN priorities for each type of Ethernet traffic that originates
from a PROFINET node. VLAN priorities range from 0 to 7, with 7 being the highest.
The PACSystems PROFINET Controller supports just four traffic classes, giving four levels of preference.
Incoming traffic without a VLAN priority is assigned to the lowest priority traffic class. The table below lists the
VLAN priorities, and their corresponding priorities in the PROFINET Controller:
VLAN PROFINET Controller
Priority
7 Highest priority
6 Second-highest priority
5 Third-highest priority
4, 3, 2, 1
Lowest priority
0
If a system includes external switches, these switches must be configured to match the VLAN Priority
groupings listed above for the PROFINET Controller.
GFK-2571N
Priority
MRP
RT_CLASS_1
High Priority
RTA_CLASS_1
Low Priority
RTA_CLASS_1
(reserved)
IP
DCP
May 2018
Chapter 4. PROFINET System Operation
Ethernet Traffic
Media Redundancy
Cyclic PROFINET IO
High-Priority PROFINET Alarms
Low-Priority PROFINET Alarms
(reserved)
Device Discovery and
Configuration
Description
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