Rockwell Automation 1794-OB16D FLEX I/O Diagnostic Modules User Manual - Manual (Page 38)

Publication 1794-UM061A-EN-P - July 2006
36 Configuring Modules for Communication on a Remote I/O Network
5. Specify parameters on 1756-DHRIO Connection tab screen.
.
A. Define the following parameters:
• Requested Packet Interval
• Inhibit Module
• Major Fault on Controller if Connection Fails While
in Run Mode
Refer to the Connection Tab Screen table for
information on how to fill-in the dialog box.
B. Click OK.
The 1756-DHRIO module is now listed in the controller
organizer
Connection Tab Screen
In This Field: Do the Following:
Define the requested rate of packet arrival. This value defines the rate for status information about the
DHRIO module to be sent to the controller. We recommend that this value be equal to the overall scan
time of your program. The parenthetical values to the right of this field display the module-dependant
minimum and maximum values.
Requested Packet
Interval (RPI)
Inhibit Module Check/clear this box if you want to disable/enable connection to the DHRIO module when the controller
goes online. If this box is checked, and you go online, the controller organizer displays an inhibit icon next
to the module. Although the 1756-DHRIO module connection is inhibited, the DHRIO scanner (Channel A
or B) changes to program mode and continues to scan the remote I/O adapters on the remote I/O network.
When inhibited, the 1756-DHRIO module accepts configuration from any ControlLogix controller in the
control system.
ATTENTION
Inhibiting the DHRIO module causes the connection to the module to be disabled
and can result in the loss of data.
Major Fault on
Controller if
Connection Fails
While in Run Mode Determine what action you want the controller to take if communication is lost to the DHRIO module.
Place a checkmark in this box if you want a major fault to occur on the controller if the connection
between the controller and the DHRIO module is lost. Leaving this box unchecked means that failure to
connect to the DHRIO module will not cause a major controller fault.