88 Rockwell Automation Publication 750COM-UM009A-EN-P - May 2017
Chapter 4 Using the I/O
in the Ethernet bridge using the RSLogix 5000® / Studio 5000® environment.
Additional I/O, if needed, can be set using up to 16 datalinks to write data
and/or up to 16 datalinks to read data. When using any combination of these
datalinks, add one 32-bit word for each datalink to the basic I/O Input Size
and/or Output Size.
Understanding the
ControlLogix Controller I/O
Image
The terms input and output are defined from the point of view of the
controller. Therefore, output I/O is controller produced data that is used by
the drive. Input I/O is drive produced status data that is used as input by the
controller. The I/O image varies based on the following:
• How many of the 32-bit datalinks (DL From Net 01…16 and DL To
Net 01…16) for the drive are used.
• ControlLogix®/CompactLogix™ Controllers only - The drive profile
that is used in RSLogix 5000 software, version 20 and Studio 5000
environment, version 21 or later. Add-on Profile is version 1.xx or later.
The drive Add-on Profile in the RSLogix 5000 and Studio 5000 environments
provide descriptive controller tags. The I/O image (tag size and location) is
automatically configured based on the drive being used. A generic profile also
exists and could be used.
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