I/O Area and I/O Allocations
4-2-1
I/O Bits Allocated to CPU Units
CPU Unit with 10 I/O Points
Input bits
Output bits
CIO 0
CIO 100
CPU Unit with 14 I/O Points
Input bits
Output bits
CIO 0
CIO 100
CPU Unit with 20 I/O Points
Input bits
Output bits
CIO 0
CIO 100
146
6 inputs
CIO 0
(CIO 0.00 to CIO 0.05)
CIO 100
(CIO 100.00 to CIO 100.03)
4 outputs
15
14
13
12
11
Do not use
Can be used as work bits.
8 inputs
CIO 0
(CIO 0.00 to CIO 0.07)
CIO 100
(CIO 100.00 to CIO 100.05)
6 outputs
15
14
13
12
11
Do not use.
Can be used as work bits.
12 inputs
CIO 0
(CIO 0.00 to CIO 0.11)
CIO 100
(CIO 100.00 to CIO 100.07)
8 outputs
15
14
13
12
11
Do not use.
Can be used as work bits.
10
9
8
7
6
10
09
08
07
06
10
09
08
07
06
5
4
3
2
1
6 input bits
4 output bits
05
04
03
02
01
8 input bits
6 output bits
05
04
03
02
01
12 inputs bits
8 output bits
Section 4-2
0
00
00