Mitsubishi Electric MELSEC-Q Series Programming Manual page 138

Precautions
• Make sure to use comments to be read with S(P).SFCSCOMR after the device specified at (d2) turns ON. Comments to be
read before the device specified at (d2) turns ON become an indefinite value.
• 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 ((d1)+1)
*1: It becomes a round-up below the decimal point.
• 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.
Operation Errors
Error code Description
2410 When a comment file specified at execution of S(P).SFCSCOMR instruction does not existed
4100 • When SFC block No. specified at n1 is other than 0 to 319
• When the number of readout comment specified at n2 is other than 0 to 256
• When the number of readout comments in a single scan specified at n3 is other than 0 to 256
4101 When exceeding the maximum value of the device in which stores comment data to be readout
4130 When the S(P).SFCSCOMR instruction is executed to the comment file in the ATA card or SD memory card
4 SFC PROGRAM CONFIGURATION
136
4.8 SFC Comment Readout Instruction
*1