94
Basic System Configuration Section 2-3
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.
4. CJ1-H-R CPU Units only.
2-3 Basic System Configuration
2-3-1 Overview
CJ-series CPU Rack
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.
CJ-series Expansion Racks
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.
Unit Data exchange during cyclic
servicing (allocations)
Event service data
communications
(IORD/IOWR
instruction)
I/O refreshing
using IORF
instruction
I/O refreshing
using FIORF
(See note 4.)
I/O
refresh-
ing using
DLNK
CJ-series
Basic I/O
Units
According to I/O
allocations
(Words are allo-
cated in order
according to the
position the Unit
is mounted.)
I/O refreshing Not provided. Yes No No
CJ-series
Special
I/O Units
Unit No. alloca-
tions
Special I/O Unit Area
(CIO): 10 words/Unit
Special I/O Unit Area
(DM): 100 words/Unit
Ye s
(Not supported for
some Units.)
Ye s
(Not supported
for some Units.)
Ye s
(Not supported
for some Units.)
No
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 No Yes
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.)
To Next Page
Loading...
