Rockwell Automation 1788-CN2FFR EtherNet/IP and ControlNet to FOUNDATION Fieldbus Linking Device - Manual (Page 24)

22 Rockwell Automation Publication 1788-UM057B-EN-P - September 2014
Chapter 2 Set Up in the Studio 5000 Logix Designer Application
4. Set the RPI for the linking device.
5. Click OK to add the linking device to the I/O tree.
Add the 1788-CN2FFR Linking
Device to the I/O Tree The 1788-CN2FFR linking device must be added to the I/O tree of the Logix
controller. The linking device must be added to a ControlNet bridge, such as an
Allen-Bradley 1756-CNB or 1756-CNBR module.
Follow these steps to add the linking device to the I/O tree of the Logix
controller. This example uses the 1756-CNBR/A module.
1. Right-click the ControlNet bridge and choose New Module.
2. Select the linking device to add to the ControlNet bridge.
3. Click the General tab and set the name, description, and ControlNet node
address.
IMPORTANT The recommended RPI is 1/2 the macrocycle time. Calculate the macrocycle by
calculating the total response time of all field devices on the segment and then
add 100
… 200 ms for class 2 (DTM message) data. If the RPI is too low, class 1
data (PVs and status) does not update each cycle, and class 2 data responses
can be slow.