Rockwell Automation 1788-FFCT NI-FBUS Configurator User Manual - Manual (Page 44)

Publication 1788-UM052B-EN-P - April 2002
4-16 Using the NI-FBUS Configurator
Defining Multiple Loops Running at Different Rates
The loop execution time shown on the Function Block Application Editor
toolbar is the default execution time for all function blocks on the
window not isolated in a loop structure. For example, the AI and PID
blocks in Figure 4.9 execute at a rate of once every second, but the
AI-PID-AO loop can be set to execute at another time by modifying the
time at the top of the shaded area.
Figure 4.9 Two Loops Running at Different Rates