Omron CP1H CPU UNITS - PROGRAMMING 05-2007, Operation Manual

Page: 188 / 788

154
I/O Area and I/O Allocations
Section 4-2
Units with 16 Output Points (CP1W-16E
@@
/CPM1A-16E
@@
)
Sixteen output bits in two words are allocated in two words (bits 00 to 07 in
CIO n and bits 00 to 07 in CIO n+1).
Two words (16 bits) are allocated to a 16-output Expansion Output Unit. No
input words are allocated. Output bits 08 to 15 can be used as work bits.
Units with 20 I/O Points (CPM1A-20ED
@@
/20EDT/20ED
@@
)
Twelve input bits are allocated in one word (bits 00 to 11 in CIO m). Eight out-
put bits are allocated in one word (bits 00 to 07 in CIO n).
One input word (12 bits) and one output word (8 bits) are allocated for a 20-
point Expansion I/O Unit.
Input bits 12 to 15 are always cleared by the system and cannot be used as
work bits. Output bits 08 to 15, however, can be used as work bits.
Units with 32 Output Points (CP1W-32E
@@
)
Thirty-two output bits are allocated in four words (bits 00 to 07 in CIO n, bits
00 to 07 in CIO n+1, bits 00 to 07 in CIO n+2 and bits 00 to 07 in CIO n+3).
Four words (32 bits) are allocated to a 32-output Expansion Output Unit. No
input words are allocated. Output bits 08 to 15 can be used as work bits.
Units with 40 I/O Points (CPM1A-40ED
@@
/40EDT/40ED
@@
)
Twenty-four input bits in two words are allocated (bits 00 to 11 in CIO m and
bits 00 to 11 CIO m+1). Sixteen output bits in two words are allocated (bits 00
to 07 in CIO n and bits 00 to 07 in CIO n+1).
Two input words (24 bits) and two output words (16 bits) are allocated to a 40-
point Expansion I/O Unit. Input bits 12 to 15 cannot be used as work bits. Out-
put bits 08 to 15, however, can be used as work bits.
Expansion Units
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
n
n+1
Output
bits
Can be used as work bits.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
n
Do not use.
Can be used as work bits.
Output bits
Input bits
m
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
n
n+1
n+2
n+3
Output
bits
Can be used as work bits.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
m
m+1
Do not use.
n
n+1
Can be used as work bits.
Input
bits
Output
bits
Unit Input words Output words
Analog I/O Units CP1W-MAD11
CPM1A-MAD11
CPM1A-MAD01
2 words CIO m to CIO m+1 1 word CIO n
Analog Input Units CP1W-AD041
CPM1A-AD041
4 words CIO m to CIO m+3 2 words CIO n to CIO n+1