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4 POSITIONING SIGNALS
(3) Single block processing signal (M4009)
(a) The single block is available in two modes: a mode where a single block is
specified before a program start, and a mode where a single block is
executed at any point during program execution.
The single block processing signal indicates that a single block can be
executed in the mode where a single block is executed at any point during
program execution.
(b) A single block is executed when the single block processing signal is ON.
When the single block processing is OFF, make an SVST start or turn
single block start from OFF to ON to perform continuous operation.
(c) This signal turns on in the following case.
• When the single block mode signal (M4408) is turned on.
(d) This signal turns off in the following case.
• When the single block start signal (M4409) is turned from off to on after
the single block mode signal (M4408) is turned off.
[Motion program example]
O0001;
N1 G90 G00 X100. F1000. ;
N2 X200. ;
N3 X300. ;
N4 X400. ;
M02;
%
Program No.
Absolute value command constant-speed positioning (X100.)
Constant-speed positioning (X200.)
Constant-speed positioning (X300.)
Constant-speed positioning (X400.)
Reset
Sequence No.
Start accept flag (M2001+n)
(Note-1)
Automatic start
(M4002+10n)
(Note-1)
Command in-position
(M2403+20n)
(Note-1)
Single block processing (M4009)
Single block mode signal (M4408)
Single block start signal (M4409)
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
ON ON
ON ON
OFF
300200 400100
3214
Motion program (Axis
designation program) start
Fig.4.5 Single block signal timings