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CJ1-H and CJ1M CPU Unit Features Section 1-3
Back Up Comment and Section Data
Comment/section data in comment memory can be backed up using the sim-
ple backup function.
Use No-protocol Communications at Multiple Ports
No-protocol communications can be performed via the serial ports of Serial
Communications Boards/Units with unit version 1.2 or later. This enables no-
protocol communications at multiple ports.
Free Running Timer Calculates Intervals without Requiring Timer Instructions
The system timers used after the power is turned ON are contained in Auxil-
iary Area words A000 and A001.
A000 is set to 0000 hex when the power is turned ON and this value is auto-
matically incremented by 1 every 10 ms. The value returns to 0000 hex after
reaching FFFF hex (655,350 ms), and then continues to be incremented in a
ring operation.
A001 is set to 0000 hex when the power is turned ON and automatically incre-
mented by 1 every 100 ms. The value returns to 0000 hex after reaching
FFFF hex (655,350 ms), and then continues to be incremented in a ring oper-
ation.
Example: The interval can be counted between processing A and processing
B without requiring timer instructions. This is achieved by calculat-
ing the difference between the value in A000 for processing A and
the value in A000 for processing B. The interval is counted in 10 ms
units.
Reuse Ladder Programs Created Using C-series CPU Units
C-series ladder programs can be easily reused through the newly supported
model conversion instructions (XFERC(565), DISTC(566), COLLC(567),
MOVBC(568), and BCNTC(621)).
Improved Functions for PRV(881) and PRV2(883) (CJ1M Only)
High-frequency calculation methods have been added to the pulse frequency
calculation methods for PRV(881) (HIGH-SPEED COUNTER PV READ) and
PRV2(883) (PULSE FREQUENCY CONVERT) instructions (minimizes the
error in high frequencies of 1 kHz or higher). PRV(881) can also be used to
read the pulse output frequency.
1-3-7 Features of CJ1-H/CJ1M CPU Units Ver. 2.0
Easier System Development by Teams
Download/Upload Tasks Individually with CX-Programmer Version 4.0 or Higher
The CX-Programmer (version 4.0 or higher) can be used to upload or down-
load only the required tasks. This enables the member of a development team
to work separately and then upload/download tasks after debugging them,
helping to eliminate the need for unification work by a manager as well as mis-
takes that can easily occur in such work.
Many Protection Functions
Improved Read Protection Using Passwords with CX-Programmer Version 4.0 or Higher
■ Read Protection for Specific Tasks
Passwords can be set to read-protect individual groups of tasks. This enables
creating black boxes in the program.
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