Omron WS02-CXPC1-V8 - V8.1 REV 02-2009 Operation Manual page 146

SFC Program Size and Execution Time
C-2 SFC Program Execution Time
The SFC program execution time varies depending on the following:
- CPU Unit model
- Active/inactive status of the steps
- Combination of AQ types of the actions
- Areas specified in the Function Block/SFC Memory Allocation Dialog Box.
The following table shows the standard execution time of each element:
Element
Task
Step
Action Boolean
Ladder/ST
program
Transition Boolean
Ladder/ST
program
Subchart
Example of SFC Program Execution Time
When CJ2H-CPU68-EIP is used and Step 1 is active in the SFC program shown below, the execution
time of the SFC program is about 13 µ seconds, including neither the action program size nor the
transition program size.
Trans7
Step1
P0 Action1
Trans1 bFlag1
D 1s bAction1
Step2
Trans3 bFlag3
Step4 N Action2
S Action3
Trans5 Transition1
Step5 N Action4
Trans6
bFlag5
Step7 R Action3
Trans7
bFlag6
Step1
130
Element status
Active
Inactive
Executed
Not executed
Executed
Not executed
Executed
Not executed
Executed
Not executed
Executed
Not executed
Trans2 bFlag2
L 1s
Step3 bAction2
Trans4 bFlag4
Step6 N Action5
PLC Model
CJ2 CJ1-R
0.3 to 10 0.4 to 15
5 to 10 7 to 12
0.2 0.3
0.1 to 9 0.1 to 12
0.1 to 0.1 to
0.5 0.7
0.6 to 9 0.7 to 13
0.2 to 0.2 to
0.8 0.8
0.2 0.2
0.1 0.1
0.5 0.5
0.1 0.1
0.6 0.6
0.3 0.3
Appendix C
(Unit: Micro second)
CJ1H CJ1G
0.4 to 15 0.7 to 15
7 to 12 7 to 12
0.3 0.4
0.1 to 12 0.2 to 13
0.1 to 0.2 to
0.7 1.3
0.7 to 13 1.6 to 14
0.3 to 1 0.5 to 2
0.3 0.4
0.2 0.3
0.6 1.3
0.2 0.3
0.7 1.3
0.3 0.6
CJ1M
0.9 to 20
10 to 17
0.5
0.2 to 18
0.2 to
1.6
1.7 to 20
0.6 to
2.5
0.6
0.4
1.6
0.4
1.7
0.8