Cs-Series Instruction Execution Times And Number Of Steps - Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual

4. Instruction Execution Times and Number of Steps
4-3 CS-series Instruction Execution Times and Number of
Steps
Note
1148
The following table lists the execution times for all instructions that are avail-
able for CS-series CPU Units (except for CS1D CPU Units
*1 Refer to the SYSMAC CS1D Duplex System Operation Manual (Cat. No.
W405) for the execution times for CS1D CPU Units.
The total execution time of instructions within one whole user program is the
process time for program execution when calculating the cycle time (See
note.).
Note User programs are allocated tasks that can be executed within cyclic tasks
and interrupt tasks that satisfy interrupt conditions.
Execution times for most instructions differ depending on the CPU Unit used
(CS1H-CPU6@H, CS1H-CPU6@, CS1G-CPU4@H, CS1G-CPU4@) and the
conditions when the instruction is executed.
The execution time can also vary when the execution condition is OFF.
The following table also lists the length of each instruction in the Length
(steps) column. The number of steps required in the user program area for
each of the CS-series instructions varies from 1 to 7 steps, depending upon
the instruction and the operands used with it. The number of steps in a pro-
gram is not the same as the number of instructions.
1. Program capacity for CS-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 equiv-
alent to 1 word. The amount of memory required for each instruction, how-
ever, is different for some of the CS-series instructions, and inaccuracies
will occur if the capacity of a user program for another PLC is converted for
a CS-series PLC based on the assumption that 1 word is 1 step. Refer to
the information at the end of 4-3 CS-series Instruction Execution Times
and Number of Steps for guidelines on converting program capacities from
previous OMRON PLCs.
Most instructions are supported in differentiated form (indicated with , ,
@, and %). Specifying differentiation will increase the execution times by
the following amounts.
Symbol
or
@ or %
2. Use the following times as guidelines when instructions are not executed.
CS1-H CPU Units
CPU6@H ( s)
0.018 to 0.108
CS1-H CPU Units
CPU6@H ( s) CPU4@H ( s)
+0.24 +0.32
+0.24 +0.32
CPU4@H ( s) CPU6@ ( s)
0.02 to 0.12 0.08 to 0.48
CS/CJ/NSJ Series Instructions Reference Manual (W474)
*1
).
CS1 CPU Units
CPU6@ ( s) CPU4@ ( s)
+0.41 +0.45
+0.29 +0.33
CS1 CPU Units
CPU4@ ( s)
0.12 to 0.72