Input (X) Loading; I/O Sharing When Using Multiple Cpus - Mitsubishi Electric Q12DCCPU-V User Manual

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CONCEPT OF MULTIPLE CPU SYSTEM

(1) Input (X) loading

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- 14 12.4 Access Ranges Between a CPU Module and Other Modules
12.4.2 Access to non-controlled modules
Whether to load inputs from input modules and intelligent function modules controlled
by other CPUs is determined by the "I/O sharing when using Multiple CPUs"
parameter in the <<Multiple CPU settings>> tab of C Controller setting utility.
Figure 12.7 I/O sharing when using multiple CPUs (Input loading)
(a) When "All CPU s can read all inputs" is selected
1) On/off data are loaded from input modules or intelligent function modules
controlled by other CPUs to the input (X) of the host CPU by execution of a bus
interface function.
/* X is read in 1 word unit */
ret = QBF_X_In_WordEx(path, flg, xno, size, data, datasize);

I/O sharing when using Multiple CPUs

All CPUs can read all inputs:
"All CPUs can read all inputs" has been set
All CPUs can read all inputs:
"Not all CPUs can read all inputs" has been set
CPU 0 1 2 3 4
2 2 2
Read when bus interface function
is executed.
Figure 12.8 When CPU No.1 loads inputs
Slot number
Control CPU setting