Communication Protocols
Copyright IXXAT Automation GmbH
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IEM Manual, 1.5
Figure 5-12: Ethernet link object attributes and services
QoS object (0x48)
Class attributes
ID
Name
Access
1
Revision
get
2
Max. instance
get
3
Number of instances
get
6
Max. ID number class attributes
get
7
Max. ID number instance attributes
get
Class services
Code
Name
0x0E
Get_Attribute_Single
Instance attributes
ID
Name
Access
4
DSCP Urgent
get/set
5
DSCP Scheduled
get/set
6
DSCP High
get/set
7
DSCP Low
get/set
8
DSCP Explicit
get/set
Instance service
Code
Name
0x0E
Get_Attribute_Single
0x10
Set_Attribute_Single
Figure 5-13: Quality of Service (QoS) object attributes and services
5.2.3 Ethernet/IP specific variable mapping
5.2.3.1 Process data mapping
In EIP process data is usually arranged in data containers called assemblies.
Although CIP supports process data mapping by means of member lists of as-
sembly instances the process data mapping of the EIP protocol running on the
IEM is completely located on the host controller. The application has to specify
two parameters for every process data variable: the location of the variable in
the SHM and the ID of the assigned assembly. The assemblies are created
and deleted by the system automatically. Together with every variable the total
length of the assigned assembly has to be specified. For an example of the
creation of a process data variable see Figure 5-14.