Mitsubishi Electric MELSEC-Q Series Programming Manual page 136

• Reading comment is performed at END processing for a scan that has executed S(P).SFCSCOMR instruction. With per
END processing, this function reads the number of comments specified at the number of comments in a single 1 scan (n3).
Comments that are not read in per END processing are followed to the next scan. Reading comments for active steps
(maximum: the number specified at n2) is completed, the device specified at (d2) turns ON for 1 scan.
For the Universal model QCPU and LCPU, when the standard ROM is selected in corresponding memory in
"Comment File Used in a Command" in the PLC File tab of the PLC parameter dialog box, the number of
comments read at END processing is determined by the system.
• The operation when a command of S(P).SFCSCOMR instruction is in ON status at S(P).SFCSCOMR instruction execution
completed is as follows.
S.SFCSCOMR instruction re-executes when a command for S.SFCSCOMR instruction is in ON status.
4 SFC PROGRAM CONFIGURATION
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4.8 SFC Comment Readout Instruction