Program Scheduling Modes; Window Modes; Figure 13: Typical Sweeps In Constant Window Mode - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK

Figure 13: Typical Sweeps in Constant Window Mode

4.2

Program Scheduling Modes

The CPU supports one program scheduling mode: the Ordered mode. An ordered
program is executed in its entirety once per sweep in the Logic Window.
4.3

Window Modes

The previous section describes the phases of a typical CPU sweep. The Controller
Communications, Backplane Communications, and Background windows can be run in
various modes, based on the CPU sweep mode. The following three window modes are
available:
CPU Operation
SWEEP n
HK
INPUT
LOGIC
OUTPUT
CC
BPC
BG
CC
SYS
BG
Abbreviations:
HK = Housekeeping
CC = Controller Communications Window
BPC = Backplane Communications Window
BG = Background Window
SWEEP n+1
SWEEP n+2
HK HK
INPUT INPUT
LOGIC LOGIC
OUTPUT
CC
BPC
OUTPUT
BG CC
CC
BPC
Section 4
October 2019
Constant
Window
Time
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