3
SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
3.8 I/O Processing and Response Lag
3.8.1 Refresh mode
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1
Overview
2
Performance
Specification
3
Sequence Program
Configuration and
Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files
Handled by CPU Module
6
Functions
7
Communication using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
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.
Figure 3.58 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