Mitsubishi MELSEC-Q Series User Manual page 134

3
CONCEPT FOR MULTIPLE CPU SYSTEM
(1) Loading input (X)
3
- 23 3.4 Access Range of CPU Module and Other Modules
3.4.2 Access range with non-controlled module
The "I/O sharing when using Multiple CPUs" setting in the PLC parameter's Multiple
CPU settings determines whether input can be loaded from input modules and
intelligent function modules being controlled by other CPUs.
Diagram 3.21 I/O sharing when using Multiple CPUs (input loading)
(a) When "All CPUs can read all inputs" has been set
1) Loads ON/OFF data from the input and intelligent function modules being
controlled by the other CPUs by performing input refresh before a sequence
program operation starts.
In addition, loading of ON/OFF data from the input and intelligent function
modules being controlled by the other CPUs is also available with direct
access input (DX).
Diagram 3.22 When performing input loading in CPU No.1
I/O sharing when using Multiple CPUs
All CPUs can read all inputs:
"All CPUs can read all inputs" setting
All CPUs can read all inputs:
"Not all CPUs can read all inputs" setting
DX20
X20
Loading is Loading is
allowed with allowed with
input refresh. direct access input.
CPU 0 1 2 3
Input Output Input Output
Number of slot points 16 points 16 points 16 points 16 points
2 2
Loading is allowed from non-controlled CPU
Slot number
4
2 Control CPU setting