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3.8 I/O Processing and Response Lag
3.8.1 Refresh mode
3
SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
3.8.1 Refresh mode
(1) Definition of refresh mode
The refresh mode batch-accesses I/O modules before start of sequence program
operation.
(2) Input
The ON/OFF information of the input module is batch-imported to the area for
communication with the input module inside the CPU module before start of sequence
program operation.
When a sequence program is executed, the ON/OFF data of the input (X) device
memory are used for the operation.
Diagram 3.56 Refresh mode
Input modeCPU module
Device memory
0
X10
ON/OFF data
ON/OFF
data
Input of ON/OFF data by
input refresh
Output of ON/OFF data
by output refresh
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