Allen-Bradley 1788-CN2FFR, User Manual, Page: 33 / 104

Rockwell Automation Publication 1788-UM057B-EN-P - September 2014 31
Set Up in the Studio 5000 Logix Designer Application Chapter 2
Figure 2 - Master Advanced Configuration Screen
Auto MacroCycle
Click the Auto MacroCycle button on the master configuration page to calculate
the recommended MacroCycle for the current linking device (see
Master
Configuration on page 28 ).
Auto MacroCycle Calculation
Macrocycle = [(time for r receive) x (configured field devices) x
(configured PVs for each field device)] + [(configured field devices) x (time for
one token exchange)] + [fixed amount of unscheduled time].
Add and Manage Device Description Files
Before field devices can be added to the 1788-CN2FFR/1788-EN2FFR linking
device, add a copy of the DD file to the field device catalog by using the
HSProcessUtility as described in
Appendix B .
The DD file defines the capabilities and configuration parameters of the field
device.
IMPORTANT
The Auto MacroCycle only takes effect after you download it to the master and
field devices.