Mitsubishi Electric Q26UD(E)HCPU User Manual page 83

(1) Precautions for setting the extension base numbers
(a) Setting order
Set the extension base number consecutively.
In Auto mode, when any extension base number is skipped, no slots will be allocated to an empty extension
base so that the slots cannot be reserved.
For details of the base mode, refer to the following.
Manuals for the CPU module used (Function Explanation, Program Fundamentals)
Main base unit
Q312B
CPU
Power supply
module
Extension base unit
Q68B
12
Q68B
0
Q68B
20
0 1 2 3 4 5 6
CPU module
Extension 1
13 14 15 16 17 18 19
Extension 2
0 0 0 0 0 0 0
21 22 23 24 25 26 27 Extension 3
CHAPTER 4 INSTALLATION AND WIRING
7 8 9 10 11
Slot number
Skipped
stage number
4
81