Mitsubishi MELSEC-Q Series User Manual page 254

6
I/O NUMBER ASSIGNMENT
(2) Precautions for extension stage number setting
6
- 4 6.2 Connecting Extension Base Units and Setting No. of Stages
(a) Extension stage number setting order
Set the extension stage numbers consecutively.
If any extension stage number is skipped in the auto mode (
of base unit assignment, 0 slot is set to the skipped stage and the number of
empty slots does not increase.
Main base unit
Q312B
CPU 0
Power supply
C Controller module
module
Extension base unit
Q68B
12 13
Q68B
0 0
Q68B
20 21
Figure 6.3 Number of slots when extension stage number is skipped
1 2 3 4 5 6 7
Extension 1
14 15 16 17 18 19
Extension 2
0 0 0 0 0 0
Extension 3
22 23 24 25 26 27
Section 6.3 (1))
Slot number
8 9 10 11
Skipped
stage number