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09/23/2014
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7 Object Model, Encoder Device
For network communication, EtherNet/IP uses an object model, in which are described
all of the functions and data of a device. Each node in the network is represented as a
collection of objects. The following Object Modelling related terms are used when
describing CIP services and protocol:
According to the EtherNet/IP specification the TR measuring system corresponds to
an “Encoder Device, Device Type 0x22”. Figure 5 therefore describes the Object
Model of a TR measuring system.
Figure 5
: Object Model “Encoder Device”
7.1 Classes
Object Classes
Number of Instances
0x01: Identity Object
1
0x02: Message Router Object
1
0x04: Assembly Object
7
0x06: Connection Manager Object
1
0x23: Position Sensor Object
1
0x47: Device Level Ring Object
1
0x48: Quality of Service Object
1
0xF4: Port Object
2
0xF5: TCP/IP Interface Object
1
0xF6: Ethernet Link Object
2
Table 3: Supported Classes