Mitsubishi Electric MELSEC-Q Series Programming Manual page 146

Program Example
• This program reads 2 comments associated with steps being activated at the SFC block No.1 when X1 is turned ON, and
stores those to the storage device after D0. (The number of comment to be read in a single scan is also set in 2.) An
interlock ladder to execute "batch write of SFC program in RUN status", "online change (inactive block)", and "write of
comment file in RUN status" is included in the following program.
When step is designated by sequence program
• Procedure for "batch writes of SFC program in RUN status" or "write of comment file in RUN status"
1.
Turns ON the X0 (write execution command in RUN status).
2.
M0 (write enable flag in RUN status) is turned ON when SP.SFCTCOMR instruction is deactivated.
3.
Turns OFF the X0 (write execution command in RUN status).
4.
Performs "batch write of SFC program in RUN status", "online change (inactive block)", or "write of comment file in RUN
status".
5.
Turns OFF the M0 (write enable flag in RUN status) in the device test of the programming tool.
6.
SP.SFCTCOMR instruction is executed again when M0 (write enable flag in RUN status) is turned OFF.
4 SFC PROGRAM CONFIGURATION
144
4.8 SFC Comment Readout Instruction