18
8.4.6 Quality of service object (class code 0x48)
Quality of service (QoS) affects the forwarding and handling of data streams
and results in individual data streams being given differential treatment (usually
preferential)� QoS can be used to ensure a transmission bandwidth for separate
data flows� The device uses QoS in connection with prioritisation�
Class attributes
Attribute
Name
access Data type
Value
1
Revision
Get
UINT
1
Instance attributes
Attribute
Name
access Data type
Value/description
4
DSCP urgent
Get, Set USINT
DSCP value for CIP transport
class 0/1 Urgent priority message
(default 55)
5
DSCP scheduled
Get, Set USINT
DSCP value for CIP transport class
0/1 Scheduled priority message
(default 47)
6
DSCP high
Get, Set USINT
DSCP value for CIP transport class
0/1 High priority message
(default 43)
7
DSCP low
Get, Set USINT
DSCP value for CIP transport class
0/1 Low priority message
(default 31)
8
DSCP explicit
Get, Set USINT
DSCP value for CIP transport class
0/1 Low priority message
(default 31)
Note: DSCP - Differentiate Service Code Points
Common services
Service code
Class
Instance
Service name
0x0E
yes
yes
Get_Attribute_Single
0x10
no
yes
Set_Attribute_Single