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4.6 Concept of I/O Number Assignment
4.6.1 I/O numbers of base unit
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I/O NUMBER ASSIGNMENT
4.6 Concept of I/O Number Assignment
4.6.1 I/O numbers of base unit
The CPU module assigns I/O numbers at power-on or reset.
Figure 4.17 shows the example of the I/O number assignment when the base unit is set in
Auto mode without I/O assignment.
The above example assumes that the I/O points of the intelligent function module are 32
points.
The number of I/O points changes depending on the intelligent function module.
Assign the I/O numbers after confirming the number of I/O points in the manual of the used
intelligent function module.
POINT
The CPU module can control even if I/O assignment has not been made by GX
Developer.
Figure 4.17 I/O number assignment example
0 to F
CPU
Q35B (5 slots occupied)
The slot numbers of the 1st
stage's extension base unit
continue from the last slot
number of the main base unit.
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.
X 0 to F
Y 0 to F
:
:
:
Inupt module
Output module
Intelligent function module
Allocate the I/O number with
the I/O points of each slot
Empty slot points designated at the
"PLC system" tab screen in the
"(PLC) Parameter" dialog box are
allocated. (Default: 16 points)
Slot number
I/O number assignment order
Number of I/O points
I/O number
Q65B (5 slots occupied)
Extension 1
Extension 2
Extension cable
Extension cable
Q68B (8 slots occupied)
X00 to 0F
90 to
AF
B0 to CF
D0 to EF
YF0 to FF
X10 to 1F
X20 to 3F
X40 to 4F
X50 to 8F
Assignment order
Number of slot points
16
points
16
points
16
points
64
points
32
points
Assignment order
Number of slot points
32
points
32
points
16
points
16
points
32
points
Assignment order
Number of slot points
16
points
16
points
32
points
32
points
16
points
16
points
16
points
32
points
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X1
10 to 1
1
F
X120 to 12F
130 to 14F
150 to 16F
170 to 18F
Y190 to 19F
Y1A0 to 1AF
Y180 to 1BF
V
a
cancy (100 to 10F)
