3
CJ-series Features Section 1-2
The CJ-series PLCs support the same task-based programming structure,
instructions, high-speed instruction execution, I/O memory, functionality, and
message communications as the CS-series PLCs. The main differences of
the CJ-series in comparison to the CS-series PLCs are as follows (refer to
page 68 for details):
• No Backplanes are required.
• Screw mounting is not supported (only DIN Track mounting).
• Smaller size (30% to 35% in terms of volume).
• Inner Boards are not supported.
• I/O interrupt tasks and external interrupt tasks are not supported by CJ1
CPU Units. (They are supported by CJ1-H CPU Units.)
• C200H Special I/O Units are not supported (e.g., SYSMAC BUS Remote
I/O Units).
• It is not necessary to create I/O tables unless desired, i.e., I/O tables can
be created automatically when power is turned ON.
• The startup mode when a Programming Console is not connected is RUN
mode (rather than PROGRAM mode, as it is for CS1 CPU Units).
• Only version 2.04 or higher versions of CX-Programmer can be con-
nected for CJ1 CPU Units, version 2.1 or higher for CJ1-H CPU Units,
and version 3.0 or higher for CJ1M CPU Units.
1-2 CJ-series Features
1-2-1 Special Features
Improvements in Basic Performance
The CJ Series provides high speed, high capacity, and more functions in
micro-size PLCs.
Only 30% to 35% of the
Volume of CS-series PLCs
At 90 x 65 mm (height x depth), the CJ-series Units have on 70% the height
and half the depth of CS-series Units, contributing to machine downsizing.
Mount to DIN Track The CJ-series PLCs can be mounted to DIN Track along with power supplies
and other components when there is limited installation space in a machine
(e.g., limited space between top and bottom ducts).
Faster Instruction
Execution and Peripheral
Servicing
The cycle time has been greatly reduced as a result of faster instruction exe-
cution (
basic instructions: 0.02, 0.08, or 0.10 µs min.; special instructions:
0.06, 0.12, or 0.15 µs min.; and floating-point instructions: 8.0, 10.2, or
13.3 µs min. for CJ1, CJ1-H, or CJ1M CPU Units)
and faster processing for
overhead, I/O refreshes, and peripheral servicing.
Ample Programming
Capacity
With up to 250 Ksteps of program capacity, 256 Kwords of DM Memory, and
2,560 I/O points, there is sufficient capacity for added-value programs includ-
ing machine interfaces, communications, data processing, etc.
Program and PLC Setup
Compatibility with CS-
series CPU Units
There is almost 100% compatibility with CS-series CPU Units for program-
ming and internal settings (PLC Setup).
Note Because of physical differences in the CJ-series PLCs, they do not
support all of the features of the CS-series PLC.
No Backplanes for Greater
Space Efficiency
A flexible system configuration that requires less space is made possible
because Backplanes are not required for CJ-series PLCs.
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