B&B Electronics GW-7472 - Manual - Manual (Page 45)

GW-7472 User Manual, Version 1.0, Dec 2010 --- 45
4. Assembly Object (04
hex
)
An EtherNet/IP Assembly Object assembles data from other objects into input and output
packages that are exchanged with the EtherNet/IP scanner. Input objects refer to the
collection of data items that are transferred from the server (the GW-7472) to the Client
(maybe the EtherNet/IP scanner). Output refers to the collection of data items that are
transferred from the client (maybe the EtherNet/IP scanner) to the server (the GW-7472).
The GW-7472 provides Input/Output/Status Assembly for transferring data and status
from the Modbus RTU network to the EtherNet/IP scanner. Generally, before using an
EtherNet/IP scanner, you need to configure what object and instance you are interesting.
Therefore, the following table must be applied to confirm the Class ID, Instance ID and
Attribute ID when using the configuration tool of the EtherNet/IP scanner. If the
configuration tool of the EtherNet/IP scanner supports the EDS loader, you can get the EDS
file of the GW-7472 by using Utility. Please refer to the section 4.2.4 for more details.
INPUT/OUPUT ASSEMBLY
Input Instance: 65
hex
Output Instance: 66
hex
The input/output instance stores the Modbus Register data for the access of the
EtherNet/IP scanner. The register data for all the Modbus nodes are packed into a
maximum 500-byte data of the EtherNet/IP package. The size of the input/output instance is
dependent on all the Modbus Read register data assigned by the Utility.
Class Attributes (Instance ID = 0
hex
)
Attribute ID Name Data Type Data Value Access Rule
1 Revision UINT 02
dec
Get
2 Max Instance UINT 03
dec
Get
3 Number of Instances UINT 03
dec
Get
6
Max Class Attributes ID
Number
UINT 07
dec
Get
7
Max Instance Attributes
ID Number
UINT 03
dec
Get