8. DATA INPUT/OUTPUT
B–63834EN/02
OPERATION
496
When a file already exists in a cassette or card, 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 or card, 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 card, or when a previously used cassette or card 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.
Inputting a program
1 Press soft key [PRGRM] on the ALL IO screen, described in Section
III–8.10.1.
2 Select EDIT mode. A program directory is displayed.
3 Press soft key [(OPRT)]. The screen and soft keys change as shown
below.
D A program directory is displayed only in EDIT mode. In all other
modes, the ALL IO screen is displayed.
O0001 N00010
EDIT
*
* * * * * * * * * * * *
14:46:09
F SRH READ PUNCH (OPRT)
>_
PROGRAM (NUM.) MEMORY (CHAR.)
USED : 60 3321
FREE : 140 127839
O0010 O0001 O0003 O0002 O0555 O0999
O0062 O0004 O0005 O1111 O0969 O6666
O0021 O1234 O0588 O0020 O0040
DELETE
4 To specify a program number to be assigned to an input program,
enter address O, followed by the desired program number.
If no program number is specified, the program number in the file or
on the NC tape is assigned as is.
Explanations
D Difference between N0
and N1
D Alarm issue during file
search
D File search using N–9999
Procedure