Concept Of I/O Number Assignment; I/O Number Assignment Of Each Module - Mitsubishi MELSEC-Q Series User Manual

3
CONCEPT FOR MULTIPLE CPU SYSTEM

3.3 Concept of I/O number assignment

In the multiple CPU system, I/O numbers are used for interactive transmission between a
CPU module and the I/O modules and intelligent function modules, or between CPU
modules.

3.3.1 I/O number assignment of each module

The multiple CPU system is different from the Single CPU system in the position (slot) of I/
O number 00
However, the concept of the order of allocating I/O numbers, I/O numbers for each slot
and empty slots is the same for both types.
(1) Position of I/O number "00
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- 19 3.3 Concept of I/O number assignment
3.3.1 I/O number assignment of each module
H.
QCPU User's Manual (Function Explanation, Program Fundamentals)
(a) Slots occupied by CPU modules
The number of slots set with the PLC parameters' multiple CPU settings are
occupied by the CPU modules on the multiple CPU system.
(b) Positions of I/O modules and intelligent function modules
I/O modules and intelligent function modules are mounted from the right of the
slots occupied by CPU modules.
(c) When not using the PC CPU module
The I/O number for an I/O module or intelligent function module mounted to the
next slot to those occupied by CPU modules is set as "00
numbers are then allocated sequentially to the right.
Example: Two CPU modules are mounted
"
H
CPU 0 1 2 3 4 5
I/O number: 00
H
Diagram 3.19 Position of I/O number "00
" and consecutive
H
Slot number
6 7
"
H