149
IR Area
Section 3-2
There isn’t a registered I/O table in CQM1H PCs, so it isn’t necessary to regis-
ter an I/O table from a Programming Device. Just mount the desired Units in
the PC and I/O is allocated automatically.
8-point I/O Units
I/O bits are allocated in one-word units, even for I/O Units that require only 8
bits.
The unused input bits (08 to 15) cannot be used as work bits, but unused out-
put bits (08 to 15) can be used as work bits.
16-point I/O Units
One input word is allocated to each 16-point Input Unit and one output word is
allocated to each 16-point Output Unit. Input or output points 0 to 15 corre-
spond to bits 00 to 15 of the allocated word.
CPU Unit
Other Units
(I/O Units and Dedicated I/O Units)
Inputs and outputs are allocated sepa-
rately from the left in the order that the
Units are connected.
Input area
16 words max.
(256 bits)
(CPU Unit inputs)
Output area
16 words max.
(256 bits)
Inputs
only
From
here
From
here
Outputs
only
Inputs
only
Inputs and outputs
16 built-in
inputs (1 word)
One word allocated
These bits are allocated.
8-point Units
16-point Units
One word allocated
