Omron CJ1M-CPU series User Manual

94
CPU Unit Components and Functions Section 2-2
2-2-3 Units Classifications
The CJ-series CPU Units can exchange data with CJ-series Basic I/O Units,
CJ-series Special I/O Units, and CJ-series CPU Bus Units, as shown in the
following diagram.
2-2-4 Data Communications
CPU Unit Data Communications
CPU Unit Connections
Note 1. The maximum number of Units on CPU Rack and Expansion Racks is 40.
There are other restrictions for the number of I/O points.
2. The maximum number of Units that can be connected is 40.
3. Some CPU Bus Units cannot be mounted to an Expansion Rack.
Unit Data exchange during cyclic servicing (allocations) Event service data
communications
(IORD/IOWR
instruction)
I/O refreshing
using IORF
instruction
CJ-series
Basic I/O Units
According to I/O allocations
(Words are allocated in order
according to the position the
Unit is mounted.)
I/O refreshing Not provided. Yes
CJ-series
Special I/O Units
Unit No. allocations Special I/O Unit Area
(CIO): 10 words/Unit
Special I/O Unit Area (DM):
100 words/Unit
Ye s
(Not available for
some Units.)
Ye s
(Not available
for some Units.)
CJ-series
CPU Bus Units
CJ-series CPU Bus Unit Area
(CIO): 25 words/ Unit
CJ-series CPU Bus Unit Area
(DM): 100 words/Unit
Not provided. No
Unit Maximum number of
Units on CPU Racks and
Expansion Racks
Racks to which Unit can be mounted
CJ-series CPU
Rack
CJ-series Expan-
sion Racks
CJ-series Basic I/O Units 40 (20 for CJ1M CPU Units)
(See Note 1.)
Ye s Yes
CJ-series Special I/O Units 40 (20 for CJ1M CPU Units)
(See Note 2.)
Ye s Yes
CJ-series CPU Bus Units 16 Yes Yes
(See Note 3.)
CJ-series
CPU Unit
CJ-series
Basic I/O Units
CJ-series
Special I/O Units
CJ-series
CPU Bus Units

Omron CJ1M-CPU series Specifications

General

Brand	Omron
Model	CJ1M-CPU series
Category	Controller
Language	English