ELAP MEM440-Bus, Инструкция по эксплуатации

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MEM-BUS
EtherNet/IP™ ENCODER
Instruction Manual
ENIP_Manual_ENG 17/07/2018
20
3.3 Assembly Object – 04H
The Assembly Object binds attributes of multiple objects, which allows data to or from each object to be
sent or received over a single connection. Assembly objects can be used to bind input data or output data,
where the terms ‘input’ and ‘output’ are defined from the network’s point of view.
An input will produce data on the network, while an output will consume data from the network.
Instance 0 includes the attributes of the class itself.
The following services are supported:

0EH – Get_Attribute_Single
Table 3.7 shows the supported attributes for instance 0.
INSTANCE 0, CLASS 04H
Attribute Access Name – Description Data type Value
1 Get Revision UINT 0002H
2 Get Max instance UINT 006EH
3 Get Number of instances UINT 0005H
6 Get Number ID of the last class attribute UINT 0007H
7 Get Number ID of the last instance attribute UINT 0004H
Table 3.7 – Class attributes of the object 04H
The following table contains all supported instance attributes of the assembly object.
Attribute Access Name – Description Data type Value
3 Get Data of the assembly instance BYTE ARRAY See table 3.9
4 Get Number of bytes in attribute 3 UINT See table 3.9
Table 3.8 – Assembly object, instance attributes
ELAP MEM-BUS encoder supports 4 I/O assembly instances. Assembly instances are also called connection
points . Two connection point types are defined:

O

T (Originator

Target = Encoder): These connection points represent output data from the
control system (PLC).

T

O (Target = Encoder

Originator): These connection points represent input data for control
system (PLC). The instances T

O contain, for example, the position and velocity values of the
encoder.
According to the Encoder Device Profile, instances 1, 2 and 3 are provided for input data. Instance 110 is
vendor specific.
Instance 100 is defined as the configuration assembly instance. Use of this assembly instance when
establishing class 1 connections is one possibility for configuration of the encoder.
The following table shows the values of attributes 3 and 4, for the assembly instances.
Instance Type Attribute 3 (data) Attribute 4 (size)
1 Input Position Value (23H, attr.10) 4 Byte
2 Input Position (23H, attr.10) + Alarm Flag (23H, attr.46) + Warning Flag (23H,
attr.49) 5 Byte
3 Input Position Value (23H, attr.10) + Velocity Value (23H, attr.24) 8 Byte
100 Output Configuration Data (see table 3.11) 28 Byte
110
Input Position Value (23H, attr.10) + Velocity Value (23H, attr.24) + Position Status
Register (23H, attr.21) + Warnings (23H, attr.47)
12 Byte
Table 3.9 –Attributes 3 and 4 of the assembly instances