Rockwell Automation 1756-DHRIO_DHRIOXT ControlLogix Data Highway Plus-Remote I/O Communication Interface Module User Manual
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Rockwell Automation Publication 1756-UM514C-EN-P - June 2014
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Using the Studio 5000 Environment in Remote I /O and Block Transfer Applications
Chapter 10
Naming Screen (first 
screen):
Parameter:
Definition:
Name
Module name. This field is required.
Description
Optional description of the module.
Parent Channel
1756-DHRIO or 1756-DHRIOXT module channel to which this adapter is 
connected.
Rack Number (#)
Remote I/O rack number (in octal from 0…76)
Starting Group
First word of input/output from a given rack begins at group 0, 2, 4, or 6. For 
example, a system of 2 racks and 4 words of I/O can be:
• Rack 12, st grp 2, size 1/4
• Rack 12, st grp 6, size 1/4
Size
Words of data are available for the given rack, including:
• 1/4 rack = 2 words of input and 2 words of output
• 1/2 rack = 4 words of input and 4 words of output
• 3/4 rack = 6 words of input and 6 words of output
• Full rack = 8 words of input and 8 words of output
Requested Packet 
Interval Screen 
(second screen):
Parameter:
Definition:
Requested Packet 
Interval
User-defined rate (2…750ms) that determines the rate at which the 
module scans data from the remote I/O.
Inhibit Module
Feature that lets you configure the remote I/O adapter module but prevent it 
from communicating with the controller. In this case, the controller does not 
establish a connection until the adapter is uninhibited.
Major Fault on 
Controller if 
Connection Fails in Run 
Mode
Use this feature to choose whether a major fault occurs on the controller if 
the connection between the controller and the 1756-DHRIO or 
1756-DHRIOXT module fails.