Mitsubishi Electric MELSEC Q Series User Manual page 129

(1) Loading input (X)
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.
(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).
3 - 24
Figure 3.21 I/O sharing when using Multiple CPUs (input loading)
DX20
X20
Loading is
allowed with
input refresh.
CPU 0 1
Input Output Input Output
Number of slot points 16 points 16 points 16 points 16 points
2
Loading is allowed from non-controlled CPU
Figure 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
Loading is
allowed with
direct access input.
Slot number
2 3 4
2 2 Control CPU setting