Access Range Of Cpu Module And Other Modules; Access Range With Controlled Module; Access Range With Non-Controlled Module - Mitsubishi Electric MELSEC Q Series User Manual

3.4 Access Range of CPU Module and Other Modules

3.4.1 Access range with controlled module

In the multiple CPU system a CPU can refresh I/O data of its controlled modules and write or read data of the buffer
memory of intelligent function modules in the same way as a single CPU system.
( User's Manual (Function Explanation, Program Fundamentals) for the CPU module used

3.4.2 Access range with non-controlled module

CPU modules can obtain input (X) ON/OFF data of non-controlled modules and output (Y) ON/OFF data of CPUs of
other No. by the PLC parameter setting.
Therefore, ON/OFF data of input modules, I/O composite module or intelligent function modules controlled by other
CPUs can be used as interlocks for the host CPU, and the output status to external equipment being controlled by
other CPUs can be confirmed.
Also, the contents of the intelligent function module's buffer memory can be read by non-control CPUs regardless of
the PLC parameter setting.
However, it is not possible for non-control CPUs to output ON/OFF data to non-controlled output modules, composite I/
O module or intelligent function modules, and to write data to the buffer memory of intelligent function modules.
Table3.7 indicates accessibility to the non-controlled modules in the multiple CPU system.
Input (X)
Output (Y)
Buffer memory of intelligent
function module
Table3.7 Access range to non-controlled module
Access target
Read
Write
Read
Write
CHAPTER3 CONCEPT FOR MULTIPLE CPU SYSTEM
I/O setting outside of the group
Disabled (Not checked) Enabled (Checked)
:Accessible :Inaccessible
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