Mitsubishi 00JCPU User Manual page 111

CPU (operation
processing area)
3)
DX0
Y20
DY25
• When a contact instruction for input is executed:
The CPU module performs a logical OR operation between input data from the input module 1) and
input data in the GX Developer input area 2) or data in the remote input refresh area.
Then, the module stores the result in the input (X) device memory and executes a sequence
program using the stored result as input data 3).
• When a contact instruction for output is executed:
The CPU module reads output data 4) from the output (Y) device memory and executes a sequence
program.
• When the OUT instruction for output is executed:
The CPU module outputs the operation result of the sequence program 5) to the output module and
also stores the result in the output (Y) device memory.
Data in the GX Developer input area can be turned on/off by the following operation.
*1:
• Test operation by GX Developer
• Writing data from a network module
• Writing data from an external device using the MC protocol
Data in the output (Y) device memory can be turned on/off by the following operation.
*2:
• Test operation by GX Developer
• Writing data from an external device using the MC protocol
• Writing data from a network module
CPU module
2) Input area
for the GX
Developer
Input (X)
*1
device
memory
4) *2
Output (Y)
device
5)
memory
Figure 3.7 I/O data flow in direct mode
CHAPTER3 CPU MODULE OPERATION
Input
1)
module
Output
module
3
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