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CJ1-H and CJ1M CPU Unit Features Section 1-3
1-3 CJ1-H and CJ1M CPU Unit Features
1-3-1 CJ1-H-R CPU Unit Features
The CJ1-H-R (high-speed) CPU Units (CJ1H-CPU@@H-R) have the following
features.
The CJ1-H-R CPU Units are completely upwardly compatible from the CJ1H-
CPU@@H Units, and yet they are much faster overall.
Example 1: A program consisting of 30K steps of only basic instructions with
128 inputs and 128 outputs executes in 0.7 ms, or 1.43 times faster (1 ms for
a CJ1-H CPU Unit).
Example 2: A program consisting of 30K steps of basic and special instruc-
tions in a 7:3 ratio with 128 inputs and 128 outputs executes in 0.9 ms, or 1.33
times faster (1.2 ms for a CJ1-H CPU Unit).
Example 3: A program consisting of 30K steps of basic, special, and floating-
point math instructions in a 6:3:1 ratio with 128 inputs, 128 outputs, two Ana-
log Input Units, and Two Position Control Units (4 axes) executes in 1.5 ms, or
5.4 times faster (8.1 ms for a CJ1-H CPU Unit).
High-speed Overhead Processing (Less Than Half of Previous Models)
Overhead processing time has been reduced from 0.3 to 0.13 ms.
High-speed I/O Refreshing (Less Than Half of Previous Models)
On average, the refresh time for Basic I/O Units and Special I/O Units has
been cut in half or more.
Examples:
16-point Input Unit: Reduced from 3
µs to 1.4 µs
Analog Input Unit: Reduced from 120
µs to 50 µs
High-speed Interrupts (Approximately Three Times Faster Than Previous Models)
The software interrupt response time has been reduced from 124 µs to 40 µs.
Scheduled Interrupts Set in Increments of 0.1 ms
A setting unit 0.1 ms has been added for scheduled interrupts.
High-speed Timer Instructions (Ten Times Faster Than Previous Models)
Although high precision was provided for the previous 1-ms timer instruction,
0.1-ms and 0.01-ms timer instructions have been added.
High-speed Clock Pulses (More Than Five Times Faster Than Previous Models)
Clock pulses of 0.1 ms, 1 ms, and 0.01 s (see note) have been added to the
previous pulses of 0.02 s, 0.1 s, 0.2 s, 1 s, and 1 min.
Note The 0.01 s Clock Pulse cannot be used with unit version 4.1 of the
CJ1-H-R CPU Units. The 0.01 s Clock Pulse can be used with all oth-
er unit versions.
High-speed Floating-point Math (Up to 70 Times Faster Than Previous Models
Floating-point calculations of sine, cosine, and tangent functions are up to 70
times faster than previous models.
Example: SIN: 42.0
µs reduced to 0.59 µs (71 times faster), COS: 31.5 µs
reduced to 0.59
µs (53 times faster), TAN: 16.3 µs reduced to 1.18 µs (13.8
times faster).
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