Publication 1756-UM514B-EN-P - February 2003
Using the 1756-DHRIO Module in Remote I/O Applications 8-9
I/O Configuration Tree in RSLogix 5000 Controller Organizer
The I/O configuration tree in the RSLogix 5000 Controller Organizer
specifies the connections to the 1756-DHRIO module, in addition to
generating the adapter list of the 1756-DHRIO module to scan.
The 1756-DHRIO module entry in the I/O configuration tree specifies
the status connection between the scanner function on the
1756-DHRIO module and the ControlLogix controller.
The adapter entries under the 1756-DHRIO module in the I/O
configuration tree specify the connections between the ControlLogix
controller and the 1756-DHRIO module for each adapter’s data.
For more information on how to use the RSLogix 5000 Controller
Organizer, and the software in general, in remote I/O applications, see
Chapter 9, Using RSLogix 5000 in Remote I/O and Block Transfer
Applications or the RSLogix 5000 online help.
Remote I/O Scanner Status
A connection is used to exchange remote I/O scanner status as
described previously. The data from the 1756-DHRIO module contains
the current state of the channels (A/B) that are configured for remote
I/O. The data from the ControlLogix controller represents an update
used by the 1756-DHRIO module to maintain ownership.
This data exchange is continually updated and is responsible for
maintaining module awareness in the system.
TIP
Only enter a 1756-DHRIO module into the I/O
configuration tree if at least one of the module’s
channels is configured for remote I/O.
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