Omron CQM1H - PROGRAM Programming Manual page 175

IR Area
32-point I/O Units
Dedicated I/O Units
I/O Allocation Example
150
Two input words are allocated to each 32-point Input Unit and two output
words are allocated to each 32-point Output Unit. I/O points 0 to 15 of connec-
tor pin A correspond to bits 00 to 15 of the first allocated word (n) and I/O
points 0 to 15 of connector pin B correspond to bits 00 to 15 of the next allo-
cated word (n+1).
Two words allocated
Dedicated I/O Units require a predetermined number of input bits, output bits,
or both input and output bits. In some Dedicated I/O Units, the number of
words required may depend on the Unit's DIP switch settings.
For example, a CQM1-AD041 Analog Input Unit requires either 4 input words
or 2 input words. (The Analog Input Unit requires 4 input words when 4 analog
inputs are being used and 2 input words when 2 analog inputs are being
used.)
Four words allocated
Input words and output words that were not allocated to Units can be used as
work words.
CPU Block Only
This example shows the I/O allocation for a PC with two DC Input Units, two
Transistor Output Units, and a Sensor Unit.
Input area
IR 000
(CPU Unit inputs)
IR 001
16 inputs
IR 002
8 inputs
IR 003
Sensor Unit
IR 004
Output area
IR 100
16 outputs
IR 101
32 outputs
IR 102
32-point Units
I O I O S
N U N U E
T N
16 16 8 32
Section 3-2
Analog inputs
IN: Input Unit
OUT: Output Unit
SEN: Sensor Unit