WCS* Read Head Position Encoding System
EtherNet/IP Interface (LS5xx*)
2020-01
49
7.4 Data Protocols
EtherNet/IP objects
All the data and functions of the read head are defined via objects in accordance with the Eth-
erNet/IP standards. The read head corresponds to the "Encoder Device Type 0x22" device
profile.
The read head supports the following listed standard and product-specific classes.
Standard classes
Product-specific class
The parameters are not directly addressable from the network with the "Set" or "Get" attribute
services. Access is via assembly objects (Class Code 0x04)
Cyclic data communication with assembly objects (Class Code 0x04)
Assemblies are special CIP objects used for cyclic data communication (implicit messaging).
These are composed of one or more attributes of various objects. These objects allow you to
send or receive data from multiple objects via a connection. The composition of the assemblies
in the read head is fixed and cannot be modified by the user.
Input assemblies
Addresses required for the various connection types
The connection type defines the connection between the control system (originator), in this
case the controls, and the target device (target), in this case the read head. The following
options are available for data traffic.
Data from the control system to the target device
Class ID Class name
0x01 Identity Object
0x02 Message Router Object
0x04 Assembly Object
0x06 Connection Manager Object
0xF5 TCP/IP Interface Object
0xF6 Ethernet Link Object
0x48 Quality of Service
Class ID Class name
0x23 Position Sensor Object
Instance
no. Description
Size
[byte] Attribute
Attribute
ID Data type
1 Position 4 Position Value Signed 10 DINT
100 Status, position, veloc-
ity, faults
7 Position Value Signed 10 DINT
Status Word 100 USINT
Velocity Value 101 USINT
Error Value 102 USINT
Instance no. (dec.) Size [byte] Connection type
192 0 Listen only
193 0 Input only
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