Mitsubishi MELSEC-Q Series Programming Manual page 162

4 SFC PROGRAM CONFIGURATION
The number of scans until S(P).SFCSCOMR
instruction completed
4 - 104
REMARKS
(1) Make sure to use comments to be read with S(P).SFCSCOMR after the device
specified at turns ON.
D2
Comments to be read before the device specified at
indefinite value.
(2) If the number of steps is larger than that of comments (n3) read in a single scan,
the active step comments are divided into the number to be read in a single scan.
Counting the total number of steps is also performed with the same comment
number (n3) for 1 scan.
In case transition conditions are remained without being counted when reading
comments completed, the counting will be continued for the remained.
Because of this, the number of scans calculated in the following formula is
required.
(Comments to be actually stored are the same points stored in (
: It becomes a round-up below the decimal point.
(3) Execute "batch write of SFC program in RUN status", "online change (inactive
block)", or "write of comment file in RUN status" while the S(P).SFCSCOMR
instruction is not executed.
Also, execute the S(P).SFCSCOMR instruction while these operations are not
executed.
The total number of steps
( +0)
D1
turns ON become an
D2
+1)
D1
The number of comments
to be read at 1 scan (n3)
4 - 104