Mitsubishi MELSEC-Q Series User Manual page 219

6
I/O NUMBER ASSIGNMENT
(2) Detail mode
In Detail mode, set the number of mountable modules to each base unit on the <<I/O
assignment setting>> tab of the C Controller setting utility.
(a) Applications
(b) Cautions on setting the number of slots
POINT
Since an empty slot set as 0 point in the I/O assignment occupies 1 slot, this mode
is used to make the unused slots unrecognized.
The number of slots can be set regardless of the number of the module being
used.
Set the number of slots for all used base units.
If the number of slot is not set for all the base units, I/O assignment may not work
correctly.
The following result if the preset number of slots differs from that of the installed
base units.
1) When the preset number of slots is greater than the number of actually
used slots
The preset number of slots is occupied.
The slots of numbers after the used ones are assigned as empty slots.
For example, when 8 slots are designated for a 5-slot base unit, 3 slots will be
empty slots.
Main base unit
Q35B
CPU
Power supply
module
Figure 6.10 When the preset number of slots is greater than the number of base unit's slots
The number of points for the empty slots is the one set on the <<System
setting>> tab or the one set on the <<I/O assignment setting>> tab of the C
Controller setting utility. (Default is 16 points.)
0 1 2 3 4 5 6
C Controller module
6.3 Base Unit Assignment (Base Mode)
7
Slot number
Three slots are occupied.
6
- 10
1
2
3
4
5
6
7
8