4
I/O NUMBER ASSIGNMENT
4.2 Relationship between No. of Extension Stages and No. of Slots
4
- 3
1
O
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iew
2
Per
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nce
S
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ecifica
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3
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4
I/O N
unb
er
Assig
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5
Me
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Func
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(2) Precautions for the number of mounted modules
Mount modules within the range of the allowed number of slots.
Even if the total number of slots for a main base unit and extension base unit is
greater than the number of available slots (for example, six 12-slot base units are
used), no error will occur when modules are mounted in slots whose number is within
a valid range.
An error ("SP. UNIT LAY ERR.") will occur if any module is mounted after the slot
exceeding the number of available slots.
Figure 4.3 Configuration example for High Performance model QCPU
Power supply
module
CPU module
Extension 1
Main base unit
Slot number
CPU
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Extension 2
24
25
26
27
28
29
30
31
32
33
34
35
Extension 3
36
37
38
39
40
41
42
43
44
45
46
47
Extension 4
48
49
50
51
52
53
54
55
56
57
58
59
Extension 5
Prohibit
Prohibit
Prohibit
Prohibit
Prohibit
Prohibit
Prohibit
Prohibit
60
61
62
63
Extension base unit
Modules can be
installed.
Modules cannot be installed.
(Installing modules will result in error.)
Q312B
Q612B
Q612B
Q612B
Q612B
Q612B
When the GOT has been bus-
connected, one slot of extension
base 1 is used.
Also one GOT occupies 16 I/O
points.
When using the GOT, consider
the number of slots and the
number of I/O points.
Refer to the GOT Manual for
details of busconnecting the GOT.
