Assembly Objects And Connections - Allen-Bradley 1788-EN2DNR User Manual

Assembly Objects and Connections

Three Assembly Object instances are accessible from the EtherNet/IP network:
input, output and status. The input and output assemblies are linked to the input
and output tags created in the Studio 5000 environment. The status assembly
provides current status information about the linking device.
With a specific 1788-EN2DNROM profile, I/O tags are mapped without an
IMPORTANT
offset. For example, the Logix Designer application input tag EN2DNR:I:Data[0]
corresponds to word 0 of the RSNetWorx for DeviceNet software input mapping
table.
The assembly instances associated with these three assemblies are listed in the
following tables.
Input Assembly
The input assembly contains a 32-bit status register followed by the data in the
linking device's input data table.
Input Assembly Format
DINT Size in DINTs
Offset
0 1
1 Up to 123
The input data format and content is determined by the DeviceNet scanner
configuration. The data appears in the table as it is mapped from the DeviceNet
input connections. The input data in the assembly is 124 DINTs long; however,
only the size of the input data table is used. The remaining space is filled with the
value 0 (zero).
Output Assembly
The output assembly contains a 32-bit command register followed by the data in
the linking device's output data table.
Output Assembly Format
DINT Size in DINTs
Offset
0 1
1 Up to 124
The output data format and content is determined by the DeviceNet scanner
configuration. The data appears in the table as it is mapped to the DeviceNet
output connections. The output data in the assembly is 123 DINT long;
however, only the size of the output data table is used. The remaining space is
ignored.
Rockwell Automation Publication 1788-UM059B-EN-P - September 2015
Description Studio 5000 Environment Version 21or Later
Example Tags
Status register EN2DNR:I.Status Register
Input data EN2DNR:I.Data[0 ...123]
Description Studio 5000 Environment Version 21or Later
Example Tags
Command register EN2DNR:O.CommandRegister
Output data EN2DNR:O.Data[0 ...122]
Configure the Linking Device Chapter 4
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