3 - 10
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
(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.
Figure 3.2 Refresh mode
Input module or
output 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
CPU module
To Next Page
Loading...
