Word Allocation - Omron CQM1 Operation Manual

Word Allocation

4-1 Word Allocation
4-1-1 CQM1H/CQM1 Word Allocation
Number of I/O Words
Unit Number of Expansion
Master
Word Allocation
DIP Switch
Master
(G7M21)
Expansion Master
(G7N11)
All pins are factory-set to OFF.
Example of Number of I/O
Words and Unit No.
Settings
48
The number of I/O words for the G730 Interface Unit Master and Expansion
Master can be switched between 1 word and 2 words using the DIP switch.
The number of I/O words set affects the word allocations and number of con-
nected Slaves. Set the required number of words to suit the Slave I/O type,
number of points, and number of Units.
Up to two Expansion Masters can be connected to each Master. Set a unique
Unit number for each Expansion Master using the DIP switch. Either Expan-
sion Master can be set as Unit 2, but a Slave address for Unit 2 can only be
used for an 8-point or 16-point Slave. It cannot be used for a 4-point Slave.
If only one Expansion Master is used, set it as Unit 1.
Word addresses are allocated sequentially from left to right to all I/O and other
mounted units, starting from 001 for inputs (000 is the CPU internal input) and
from 100 for outputs, independent of the Master and Expansion Master Unit
number.
In multiple systems (using multiple Masters), the word addresses are allo-
cated to the inputs and outputs sequentially from the leftmost mounted unit,
independent of the system number.
Set the DIP switch before turning the CQM1H/CQM1 power on. The switch
settings are enabled when the CQM1H/CQM1 power is turned on.
Set OFF
HOLD function setting
Number of output
words setting
Number of input words setting
ON: 1 word (16 points)
OFF: 2 words (32 points)
Set OFF
ON: Unit 2
Unit # setting
OFF: Unit 1
Number of input words setting
ON: 1 word (16 points)
OFF: 2 words (32 points)
The mounting positions of the Master and Expansion Master are not specified
but the wiring must be connected in the order: Master to Expansion Master to
Slave. The I/O addresses are allocated sequentially in the order the Units are
mounted (refer to 4-1-2 Precautions).
Expansion Master
(G7N01)
Set OFF
Unit # setting
Number of output words setting
ON: 1 word (16 points)
OFF: 2 words (32 points)
Section 4-1
ON: Unit 2
OFF: Unit 1