Mitsubishi MELSEC-Q Series Programming Manual page 161

4 SFC PROGRAM CONFIGURATION
(11) While SFC program is not executed, reading comments is not performed even if executing
S(P).SFCSCOMR instruction.
Executing S(P).SFCSCOMR instruction at a status without SFC program being executed, 0
is stored to "the total number of steps (
comments (
At this time, the device specified in
(12) With S(P). SFCSCOMR instruction, comments for the normal SFC program can be read.
Comments of a SFC program to control program execution are not read.
Executing S(P).SFCSCOMR instruction specifying a SFC program for program execution
control, 0 is stored to "the total number of transit conditions (
steps that have read comments (
At this time, the device specified in
(13) S(P).SFCSCOMR instruction cannot be executed simultaneously with S(P).SFCSCOMR
instruction or S(P).SFCTCOMR instruction.
Executing S(P).SFCSOMR, and if S(P).SFCSCOMR instruction or S(P).SFCTCOMR
instruction is executed before reading comments completed, the 2nd instruction will be de-
activated.
(14) When the S(P).SFCSCOMR instruction is attempted to be executed while SM721 is on, the
instruction will not be executed. However, when the execution condition is met, the
instruction will be executed in the next scan.
SM721 turns on in the following operations:
• The S(P).SFCSCOMR instruction or the S(P).SFCTCOMR instruction is executed.
• The COMRD(P), S(P).FWRITE, S(P).FREAD, or SP.DEVST instruction is executed.
• A file in the ATA card, SD memory card, or standard ROM is accessed by the read from
PLC or write to PLC function, or by other file access operations. (Universal model QCPU
and LCPU only)
(15) For the Universal model QCPU and LCPU, when the S(P).SFCSCOMR instruction is
attempted to be executed while online change (inactive block) is executed to the SFC block
of comment read target, the instruction will not be executed. However, when the execution
condition is met, the S(P).SFCSCOMR instruction will be executed in the next scan.
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+1)".
D1
D1
+0)" and "the number of steps that have read
D1
turns ON for 1 scan.
D2
+1)".
turns ON for 1 scan.
D2
+0)" and "the number of
D1
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