29 (54)
6.8
QoS Object (48h)
Object Description
Quality of Service (QoS) is a general term that is applied to mechanisms used to treat traffic streams with
different relative priorities or other delivery characteristics. Standard QoS mechanisms include IEEE 802.1D/Q
(Ethernet frame priority) and Differentiated Services (DiffServ) in the TCP/IP protocol suite.
The QoS Object provides a means to configure certain QoS related behaviors in EtherNet/IP devices.
The object is required for devices that support sending EtherNet/IP messages with nonzero DiffServ code
points (DSCP), or sending EtherNet/IP messages in 802.1Q tagged frames.
Supported Services
Class:
Get_Attribute_Single
Instance:
Get_Attribute_Single
Set_Attribute_Single
Class Attributes
#
Name
Access
Type
Value
1
Revision
Get
UINT
0001h (Object revision)
Instance Attributes
#
Name
Access
Type
Value/Description
1
802.1Q Tag
Enable
Set
USINT
Enables or disables sending 802.1Q frames.
Value:
0
1
Contents:
Disabled (Default)
Enabled
4
DSCP Urgent
Set
USINT
CIP transport class 1 messages with priority Urgent
Default: 55
5
DSCP
Scheduled
Set
USINT
CIP transport class 1 messages with priority Scheduled
Default: 47
6
DSCP High
Set
USINT
CIP transport class 1 messages with priority High
Default: 43
7
DSCP Low
Set
USINT
CIP transport class 1 messages with priority Low
Default: 31
8
DSCP Explicit
Set
USINT
CIP UCMM and CIP class 3
Default: 27
Anybus
®
CompactCom
™
B40 Modbus Serial EtherNet/IP Network Guide
SCM-1202-131 1.1 en-US
