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CJ1-H and CJ1M CPU Unit Features Section 1-3
New Instruction Added
The following instructions have been added.
• High-speed sine calculation: SINQ(475)
• High-speed cosine calculation: COSQ(476)
• High-speed tangent calculation: TANQ(462)
• Floating-point move: MOVF(469)
• High-speed Special I/O Unit refresh: FIORF(225)
More Relays in Relay Network Tables in Routing Tables
The number of relays that can be set in a relay network table has been
increased from 20 to 64. Refer to the CX-Integrator Operation Manual (W445)
and the Communication Unit operation manuals for details.
1-3-2 CJ1-H CPU Unit Features
Faster in Essentially Every Way
Ultra High-speed Cycle
Time
The CJ1-H CPU Units provide a cycle time that is three to four times faster
than that of the CJ1 CPU Units.
For example, a program consisting of 38 Ksteps of only basic instructions with
128 inputs and 128 outputs executes in 1 ms (4.9 ms for the CJ1 CPU Units);
a program consisting of 20 Ksteps of basic and special instructions in a 1:1
ratio with 128 inputs and 128 outputs executes in 1 ms (2.7 ms for the CJ1
CPU Units); and a program consisting of 8 Ksteps of basic and special
instructions in a 1:2 ratio with 64 inputs and 64 outputs executes in 0.5 ms
(1.4 ms for the CJ1 CPU Units).
The following factors give the CJ1-H CPU Units their high speed.
1,2,3... 1. Instruction execution times: Only about 1/2 the time required for basic in-
structions, and only about 1/3 the time required for special instructions.
2. Better bus performance: Data transfers between the CPU Unit and Special
I/O or Communications Units is about twice as fast, providing greater over-
all system performance.
3. Instruction execution is performed in parallel with peripheral servicing.
4. Other factors, including background execution of text string processing and
table data processing instructions.
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