Rockwell Automation 1788-EN2DN Ethernet-to-DeviceNet Linking Device - Manual (Page 36)

36 Ethernet-to-DeviceNet Linking Device
Rockwell Automation Publication 1788-IN055C-EN-P - September 2011
Assembly Objects and Connections
Three Assembly Object instances are accessible from EtherNet/IP: input,
output and status. The input and output assemblies are linked to the input and
output tags created in RSLogix 5000 software. The status assembly provides
current status information about the linking device.
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.
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 will be used. The remaining space will be
filled with the value 0 (zero).
IMPORTANT With a specific 1788-EN2DN profile, I/O tags are mapped without an offset.
For example, RSLogix 5000 version13 input tag EN2DN:I:Data[0] corresponds
to word 0 of the RSNetWorx for DeviceNet software input mapping table.
Input Assembly Format
DINT
Offset Size in
DINTs
Description RSLogix 5000 software
version 12 example tags RSLogix 5000 software
version 13 or later
example tags
0 1 Status register EN2DN:
I.Data[0]
EN2DN:
I.Status Register
1 Up to
123 Input data EN2DN:
I.Data[1 - 124]
EN2DN:
I.Data[0 …123]