Rockwell Automation 1788-FFCT NI-FBUS Configurator User Manual - Manual (Page 14)

Publication 1788-UM052B-EN-P - April 2002
1-6 Fieldbus Overview
Loops
A loop or control loop is a group of function blocks connected by
linkages executing at a configured rate. Each block executes at the
configured rate and data moves across the linkages between the
blocks at the configured rate. Figure 1.5 shows an example of a
control loop.
Figure 1.5 Control Loop
Multiple Loops
It is possible to have multiple loops running at different rates on a
link. Figure 1.6 shows an example of multiple loops.
Figure 1.6 Multiple Loops Running At Different Rates
Loop = 1 sec
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