Basic System Configuration; Data Communications; Overview - Omron CJ - 09-2009 Operation Manual

Basic System Configuration

2-2-4

Data Communications

CPU Unit Data Communications
Unit Data exchange during cyclic
servicing (allocations)
CJ-series According to I/O
Basic I/O allocations
Units
(Words are allo-
cated in order
according to the
position the Unit
is mounted.)
CJ-series Unit No. alloca-
Special tions
I/O Units
CJ-series
CPU Bus
Units
CPU Unit Connections
Unit
CJ-series Basic I/O Units
CJ-series Special I/O Units
CJ-series CPU Bus Units
Note
2-3

Basic System Configuration

2-3-1

Overview

CJ-series CPU Rack
CJ-series Expansion Racks
94
Event service data
communications
I/O refreshing Not provided.
Special I/O Unit Area Yes
(CIO): 10 words/Unit
(Not supported for
Special I/O Unit Area some Units.)
(DM): 100 words/Unit
CJ-series CPU Bus Not provided.
Unit Area (CIO): 25
words/ Unit
CJ-series CPU Bus
Unit Area (DM): 100
words/Unit
Maximum number of
Units on CPU Racks and
Expansion Racks
40 (20 for CJ1M CPU Units)
(See note 1.)
40 (20 for CJ1M CPU Units)
(See note 2.)
16
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.
4. CJ1-H-R CPU Units only.
A CJ-series CPU Rack can consist of a CPU Unit, a Power Supply Unit, Basic
I/O Units, Special I/O Units, CPU Bus Units, and an End Cover. A Memory
Card is optional. An I/O Control Unit is required to connect an Expansion
Rack.
A CJ-series Expansion Rack can be connected to the CPU Rack or other CJ-
series Expansion Racks. An Expansion Rack can consist of an I/O Interface
Unit, a Power Supply Unit, Basic I/O Units, Special I/O Units, and CPU Bus
Units, and an End Cover.
I/O refreshing
using IORF
(IORD/IOWR instruction
instruction)
Yes
Yes
(Not supported
for some Units.)
No
Racks to which Unit can be mounted
CJ-series CPU
Rack
Yes
Yes
Yes
Section 2-3
I/O refreshing
using FIORF
(See note 4.)
No No
Yes No
(Not supported
for some Units.)
No Yes
CJ-series Expan-
sion Racks
Yes
Yes
Yes
(See note 3.)
I/O
refresh-
ing using
DLNK