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3.8.2
Direct mode
(1) Definition
The direct mode is a mode for the CPU module to access input/output modules and performs I/O
processing at the timing when each instruction is executed in a sequence program.
0
On/off
data
With this mode, the CPU module uses the direct access input (DX) and direct access output (DY) to
perform I/O processing.
Input of on/off data upon
instruction execution
Device memory
Output of on/off data upon
instruction execution
DX10
CPU module
Figure 3.6 Direct mode
CHAPTER3 CPU MODULE OPERATION
On/off data
Input module or
output module
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