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3
General Instruction Characteristics
Section 1-1
• CJ1-H CPU Units
• CJ1 CPU Units
• CJ1M CPU Units
Note
Program capacity for CS/CJ-series PLCs is measured in steps, whereas pro-
gram capacity for previous OMRON PLCs, such as the C-series and CV-
series PLCs, was measured in words. Basically speaking, 1 step is equivalent
to 1 word. The amount of memory required for each instruction, however, is
different for some of the CS/CJ-series instructions, and inaccuracies will occur
if the capacity of a user program for another PLC is converted for a CS/CJ-
series PLC based on the assumption that 1 word is 1 step. Refer to the infor-
mation at the end of
SECTION 4 Instruction Execution Times and Number of
Steps
for guidelines on converting program capacities from previous OMRON
PLCs.
The number of steps in a program is not the same as the number of instruc-
tions. For example, LD and OUT require 1 step each, but MOV(021) requires
3 steps. Other instructions require up to 15 steps each. The number of steps
required by an instruction is also increased by one step for each double-
length operand used in it. For example, MOVL(498) normally requires 3 steps,
but 4 steps will be required if a constant is specified for the source word oper-
and, S. Refer to
SECTION 4 Instruction Execution Times and Number of
Steps
for the number of steps required for each instruction.
1-1-2
Differentiated Instructions
Most instructions in CS/CJ-series PLCs are provided with both non-differenti-
ated and upwardly differentiated variations, and some are also provided with a
downwardly differentiated variation.
• A non-differentiated instruction is executed every time it is scanned.
Model
Program capacity
I/O points
CJ1H-CPU67H-R
250K steps
2,560
CJ1H-CPU66H-R
120K steps
CJ1H-CPU65H-R
60K steps
CJ1H-CPU64H-R
30K steps
CJ1H-CPU67H
250K steps
CJ1H-CPU66H
120K steps
CJ1H-CPU65H
60K steps
CJ1G-CPU45H
60K steps
1,280
CJ1G-CPU44H
30K steps
CJ1G-CPU43H
20K steps
960
CJ1G-CPU42H
10K steps
Model
Program capacity
I/O points
CJ1G-CPU45
60K steps
1,280
CJ1G-CPU44
30K steps
Model
Program capacity
I/O points
CJ1M-CPU23
20K steps
640
CJ1M-CPU22
10K steps
320
CJ1M-CPU21
5K steps
160
CJ1M-CPU13
20K steps
640
CJ1M-CPU12
10K steps
320
CJ1M-CPU11
5K steps
160
Summary of Contents for SYSMAC CS1D-CPU**
Page 3: ...iv...
Page 29: ...xxx...
Page 185: ...146 List of Instructions by Function Code Section 2 4...
Page 1389: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2...
Page 1390: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits...
Page 1391: ...1352 ASCII Code Table Appendix A...