Cpu Sweep Modes; Figure 41: Typical Sweeps In Normal Sweep Mode - GE PACSystems RX7i Reference Manual

Chapter 4. CPU Operation

4.1.2 CPU Sweep Modes

Normal Sweep Mode
In Normal Sweep mode, each sweep can consume a variable amount of time. The Logic window is
executed in its entirety each sweep. The Communications windows can be set to execute in a Limited or
Run-to-Completion mode. Normal Sweep is the most common sweep mode used for control system
applications.
The following figure illustrates three successive CPU sweeps in Normal Sweep mode. Note that the total
sweep times may vary due to sweep-to-sweep variations in the Logic window, Communications
windows, and Background window.
Abbreviations:
HK = Housekeeping
CC = Controller Communications Window
BPC = Backplane Communications Window
BG = Background Window
144
SWEEP n
HK
INPUT
LOGIC
OUTPUT
CC
BPC
BG

Figure 41: Typical Sweeps in Normal Sweep Mode

PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual
SWEEP n+1 SWEEP n+2
HK HK
INPUT INPUT
LOGIC LOGIC
OUTPUT
CC
BPC
BG
OUTPUT
CC
BPC
BG
GFK-2222AD