Omron CS1G/H-CPUxxH Instructions Manual page 24

Sysmac cs series; sysmac cj series

Hide thumbs Also See for CS1G/H-CPUxxH:

Table of Contents

General Instruction Characteristics

Differentiated Instructions

• 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

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 7 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.

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.

• An upwardly differentiated instruction is executed only once after its exe-

cution condition goes from OFF to ON.

Program capacity

Program capacity

Program capacity

Chapters

Table of Contents