
OPERATION
B–64124EN/01
8. DATA INPUT/OUTPUT
569
6 Press soft keys [F SRH] and [EXEC].
The specified file is found.
When a file already exists in a cassette, specifying N0 or N1 has the same
effect. If N1 is specified when there is no file on the cassette or card, an
alarm is issued because the first file cannot be found. Specifying N0
places the head at the start of the cassette, regardless of whether the
cassette/card already contains files. So, no alarm is issued in this case.
N0 can be used, for example, when a program is written into a new
cassette, or when a previously used cassette is used once all the files it
contains have been erased.
If an alarm (file search failure, for example) is generated during file
search, the CNC does not issue an alarm immediately. However, a P/S
alarm (No. 086) is issued if input/output is subsequently performed on
that file.
Instead of sequentially searching for files by specifying actual file
numbers every time, the user can specify the first file number, then find
the subsequent files by specifying N–9999. When N–9999 is specified,
the time required for file search can be reduced.
EXECCAN
Explanations
D Difference between N0
and N1
D Alarm issue during file
search
D File search using N–9999