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5-2
Section
I/O Allocation for CPM1/CPM1A/CPM2A PCs
315
CPM2A
No. of I/O
(on CPU Unit)
Model number
I/O
Allocated bits
Max. No. of
Expansion I/O
Units
Max. No. of I/O
(see note 1)
20
CPM2A-20CDR-
CPM2A-20CDT-D
Input
12 inputs: 0000 to 00011
3
80
CPM2A-20CDT-D
CPM2A-20CDT1-D
Output
8 outputs: 01000 to 01007
30
CPM2A-30CDR-
CPM2A-30CDT-D
CPM2A-30CDT1-D
Input
18 inputs:
00000 to 00011
00100 to 00105
3
90
Output
12 outputs:
01000 to 01007
01100 to 01103
40
CPM2A-40CDR-
CPM2A-40CDT-D
CPM2A-40CDT1-D
Input
24 inputs:
00000 to 00011
00100 to 00111
3
100
Output
16 outputs:
01000 to 01007
01100 to 01107
60
CPM2A-60CDR-
CPM2A-60CDT-D
CPM2A-60CDT1-D
Input
36 inputs:
00000 to 00011
00100 to 00111
00200 to 00211
3
120
Output
24 outputs:
01000 to 01007
01100 to 01107
01200 to 01207
Note
1. The values for the maximum number of I/O in the above table include the I/O
on Expansion I/O Units.
2. When using a CPM2A CPU Unit, up to 3 Expansion Units or Expansion I/O
Units can be connected to the PC.
CPU Unit Allocation
•
In the following diagrams, shaded areas indicate bits actually used for inputs or
outputs.
•
Input bits are allocated starting from IR 00000.
•
Output bits are allocated starting from IR 01000.
•
Bits in the output words that are not used as output bits can be used as work
bits.
•
Bits in the input words that are not used as input bits cannot be used as work
bits.
CPU Units with 10 I/O Points
6 inputs
IR 00000 to IR 00005
4 outputs
IR 01000 to IR 01003
CPM1-10CDR-
CPM1A-10CD
-
Inputs
Outputs
IR 000
IR 010
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Do not use
Bits