Mitsubishi Electric Q172CPU Programming Manual page 76

4 POSITIONING DEDICATED SIGNALS
Servo program start
Start accept flag
OFF
(M2001+n)
Positioning complete
signal (M4001+20n)
Positioning start
OFF
complete signal
(M4000+20n)
(2) Virtual servo start accept flag (M2001 to M2032)
(a) This flag turns on when the servo program is started. The start accept flag
corresponding to an axis specified with the servo program turns on.
(b) The ON/OFF processing of the start accept flag is shown below.
1) When the servo program is started using the Motion SFC program or
Motion dedicated PLC instruction (S(P).SVST), the start accept flag
corresponding to an axis specified with the servo program turns on and
it turns off at the positioning completion. This flag also turns off when it
is made to stopping on the way.
(When it is made to stop on the way by the speed change to speed "0",
this flag remains on.)
Normal positioning completion
V
Dwell time
Positioning
completion
ON
ON
2) This flag turns on at the positioning control by turning on the JOG start
command (M4802+20n or M4803+20n), and turns off at the positioning
stop by turning off the JOG start command.
3) This flag turns on during the manual pulse generator enable (M2051 to
M2053: ON), and turns off at the manual pulse generator disable
(M2051 to M2053: OFF).
4) This flag turns on during a current value change by the CHGA
instruction of servo program or Motion dedicated PLC instruction
(S(P).CHGA), and turns off at the completion of the current value
change.
CHGA instruction
Start accept flag
(M2001 to M2032)
t
Servo program start
Start accept flag
(M2001+n)
Positioning complete
signal (M4001+20n)
Positioning start
complete signal
(M4000+20n)
ON
Current value changing
OFF
processing
4 - 45
.............. Status signal
Positioning stop during control
V
Positioning
Positioning
stop
start
completion
ON
OFF
ON
OFF
Turns off at the completion of
current value change.
t