GE PACSystems RX7i Reference Manual

Chapter 4. CPU Operation
144 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD
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.
HK
INPUT
OUTPUT
CC
BPC
BG
LOGIC
SWEEP n+1
HK
INPUT
OUTPUT
CC
BPC
BG
SWEEP n
SWEEP n+2
HK
INPUT
OUTPUT
CC
BPC
LOGIC
LOGIC
BG
Abbreviations:
HK = Housekeeping
CC = Controller Communications Window
BPC = Backplane Communications Window
BG = Background Window
Figure 41: Typical Sweeps in Normal Sweep Mode

GE PACSystems RX7i Specifications

General

Brand	GE
Model	PACSystems RX7i
Category	Controller
Language	English