5 - 9 5 - 9
MELSEC-Q
5 ASSIGNMENT OF I/O NUMBERS
The following shows the example of the I/O number assignment when the base unit is
set in Auto mode without I/O assignment:
Power supply module
0
X00
X0F
1234
X10
X1F
X20
X3F
Y40
Y4F
Y50
Y8F
Q35B (5 slots occupied)
IN OUT
6
90
AF
7895
B0
CF
D0
EF
YF0
YFF
100
10F
11
X110
X11F
12 13 14
Q68B (8 slots occupied)
10
X120
X12F
130
14F
150
16F
170
18F
15 16 17
Y190
Y19F
Y1A0
Y1AF
Y1B0
Y1BF
Extension
cable
1
Slot No.
Allocate the I/O number with
the I/O points of each slot
I/O numbering direction
The slot numbers of the 1st stage's extension
base unit continue from the last slot number
of the main base unit.
Empty slot points designated at the "PLC system"
tab screen in the "(PLC) Parameter" dialog box are
allocated. (Default: 16 points)
The slot numbers of the 2nd stage's extension
base unit continue from the last slot number of
the 1st stage's extension base unit.
2
Q65B (5 slots occupied)
.........
.............
16
points
Input module
Input module
Input module
Output module
Output module
16
points
32
points
16
points
64
points
Power supply module
Intelligent
function module
Intelligent
function module
Intelligent
function module
Output module
Empty
32
points
32
points
32
points
16
points
16
points
IN OUT
Power supply module
Input module
Input module
Intelligent
function module
Intelligent
function module
Intelligent
function module
Output module
Output module
Output module
16
points
16
points
32
points
32
points
32
points
16
points
16
points
16
points
CPU module
POINT
The above example shows the case where the intelligent function module has 32
I/O points.
The number of occupied I/O points may vary depending on the intelligent function
module.
Refer to the manual of the intelligent function module being used and check the
number of the I/O points before assigning the I/O numbers.
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