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

13
MULTIPLE CPU SYSTEM CONCEPT

13.3 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.

13.3.1 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 order of allocating I/O numbers, I/O numbers for each slot and empty slots is
the same for both systems. (
(1) Position of I/O number "00
Remark
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13.3.1 I/O number assignment of each module
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(a) Slots occupied by CPU modules
In the multiple CPU system, the CPU modules occupy the number of slots set on
the <<Multiple CPU settings>> tab of the C Controller setting utility.
(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) Input number assignment
The I/O number for an I/O module or intelligent function module mounted to the
slot next to those occupied by CPU modules is set as "00
numbers are then allocated sequentially to the right.
Example: Two CPU modules are mounted
When the number of CPU modules mounted on the main base unit are fewer than
the one set on the <<Multiple CPU settings>> tab of the C Controller setting utility,
set the empty slots to "CPU (Empty)".
Refer to Section 13.1 for the "CPU (Empty)" setting.
Chapter 6)
"
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CPU 0 1 2 3 4 5
I/O number: 00
Figure 13.16 Position of I/O number "00
" and consecutive
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Slot number
6 7
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