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MELSEC-Q
6 I/O Processing of Data Files
• File numbers specified by the OPEN instruction are managed by each program.
Therefore, no problem occurs even if the file number for the data file opened
simultaneously has a different number for each program.
# 4
A
# 1
B
# 3
C
Drive 0 ,
ABC.DAT
6.4.2 Number of data files that can be handled by each program
A maximum of eight data files can be opened simultaneously for each program. Also,
each program can open 8 data files under multitasking conditions. Thus, a maximum of
64 data files can be opened simultaneously for the entire communication module.
