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3.8.1 Refresh mode
(1) Definition
Refresh mode is a mode for the CPU module to access input/output modules and perform I/O
processing collectively before the start of sequence program operations.
On/off
data
(2) Input
On/off data of an input module are batch-input to the area for communication with the input module in
the CPU module before the start of sequence program operations.
The CPU module performs sequence program operations using the on/off data stored in the input (X)
device memory.
3 - 9
Device memory
0
X10
CPU module
Figure 3.2 Refresh mode
Input of on/off data by
input refresh
Output of on/off data by
output refresh
Input module or
output module
On/off data
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