Omron CQM1 User Manual

49
Word Allocation Section 4-1
The 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.
4-1-2 Precautions
Avoid the following cases, which lead to complex word allocation and wiring
connections.
Expansion Master Unit No. Out of Mounting Order
Take care of the allocation of Expansion Master Unit 1 and Unit 2 word
addresses.
If one Expansion Master is used for input and another for output, take care
that the Expansion Master Unit numbers and the Unit 1/Unit 2 Slave address
settings are not reversed.
A 4-point Slave cannot be used as a Unit 2 Slave address.
System 1
Master (G7M21)
Number inputs: 2 words
Number of outputs: 2 words
Number of output
words setting
Number of input
words setting
Expansion Master (G7N01)
Set as Unit 1
Number of outputs: 1 word
Unit # setting
Number of output
words setting
Expansion Master (G7N11)
Set as Unit 2
Number of inputs: 1 word
Unit # setting
Number of input
words setting
System 2
Master (G7M21)
Number inputs: 2 words
Number of outputs: 1 word
Number of output
words setting
Number of input
words setting
Expansion Master (G7N11)
Set as Unit 1
Number of inputs: 1 word
Unit # setting
Number of input
words setting
CQM1H/CQM1
System 1
I/O Output
System 2
Input I/O Input
16
points
16
points
Master
Expansion Master Unit 1 Expansion Master Unit 2
Master
Expansion Master Unit 1
Unit
Input word
Output
word
→→
→→
→

Omron CQM1 Specifications

General

Model	CQM1
I/O Capacity	Up to 256 I/O points
Programming Language	Ladder Logic
Timer/Counter	128 timers/counters
Operating Temperature	0 to 55°C
Humidity	10 to 90% RH (non-condensing)
Power Supply	24 VDC or 100-240 VAC
Communication Ports	RS-232C
Memory Capacity	3.2K words
Instruction Set	Basic and advanced instructions
Memory	RAM (battery-backed)
Program Memory	3.2K words
Storage Temperature	-20 to 75°C