Sfc Program Processing Time - Mitsubishi Electric MELSEC iQ-R Series User Manual

SFC program processing time

This section describes the time required for SFC program processing.
For details on the SFC program, refer to the following.
 MELSEC iQ-R Programming Manual (Program Design)
SFC program processing performance
The SFC program execution time can be calculated with the following formula.
• SFC program execution time = (A) + (B) + (C)
Item
(A) SFC processing time
(B) Operation output processing time for
all steps
(C) Processing time for all transition
conditions
*1 For the processing time for each instruction, refer to the following.
 MELSEC iQ-R Programming Manual (CPU Module Instructions, Standard Functions/Function Blocks)
The following table lists the types of the SFC processing time (A).
• SFC processing time (A) = (a) + (b) + (c) + (d) + (e) + (f) + (g) + (h)
Item
(a) Active block processing time
(b) Inactive block processing time
(c) Nonexistent block processing time
(d) Active step processing time
(e) Active transition processing time
(f) Transition establishment step
processing time
(g) SFC END processing time
(h) Operation output processing time
The following table lists the coefficient values for each processing time.
Item
Active block processing time coefficient
Inactive block processing time coefficient
Nonexistent block processing time coefficient
Active step processing time coefficient
Active transition processing time coefficient
Transition establishment step processing time
coefficient
SFC END processing time
Operation output processing time coefficient
APPX
722
Appendix 7 Processing Time
Description
This is the total time shown in the following table.
This is the total processing time for each instruction used for operation output for all steps in the active status.
This is the total processing time for each instruction used for transition conditions associated with each step in
the active status.
Processing time calculation (unit: s)
Active block processing time coefficient 
Number of active blocks
Inactive block processing time coefficient 
Number of inactive blocks
Nonexistent block processing time coefficient 
Number of nonexistent blocks
Active step processing time coefficient  Number
of active steps
Active transition processing time coefficient 
Number of active transitions
Transition establishment step processing time
coefficient  Number of transitions
SFC END processing time = SFC END
processing time
Action processing time coefficient  Number of
actions
Hold step
Normal step
Description
This is the system processing time required to execute
active blocks.
This is the processing time required to execute inactive
blocks.
This is the system processing time required to execute
blocks that have not been created.
This is the time required to execute active steps.
This is the system processing time required to execute
active transitions.
This is the time required to turn off active steps when
transitions are established.
This is the system processing time required for SFC END
processing.
This is the system processing time required to process
operation outputs.
Coefficient value
4.4
2.7
0.23
6.8
0.12
22.5
31.0
56.5
0.94