Mitsubishi Electric MELSEC-Q QD75M User Manual page 136

5 DATA USED FOR POSITIONING CONTROL
Servo emergency
stop signal
Axis status
Servo emergency
stop signal
Axis status
Setting value buffer memory
address
Axis 1 Axis 2 Axis 3 Axis 4
64 214
65 215
2) When the difference between the last command position of the QD75
at the time the servo stop signal turned ON and the present value at
the time the servo stop signal turned OFF is greater than the value
set in the buffer memory for the restart allowable range setting, the
positioning operation is judged as on-standby and cannot be
restarted.
OFF
Operation
Last command position
(b) Processing when the servo ON signal changes from OFF to ON.
1) The positioning operation is stopped and restart can be performed
when the difference between the last command position of the QD75
when the servo ON signal went from OFF to ON is lower than the
value set in the buffer memory for restart allowable range setting.
2) When the difference between the last command position of the QD75
at the time the servo ON signal when from ON to OFF and the
present value at the time the servo ON signal went from OFF to ON
is greater than the value set in the buffer memory for the restart
allowable range setting, the positioning operation is judged as on-
standby and cannot be restarted.
ON
Positioning Stopping
Stop command
(2) Setting method
When performing restart at the time servo OFF changes to ON, set the restart
allowable range in the following buffer memory.
Pr.201 Restart allowable range
364 514
setting when servo OFF changes
365 515
to ON
[Setting example]
A program in which the restart allowable range for axis 1 is set to 10000 PLS
is shown below.
DTOP H0 K64 D0 K1
ON
Error Servo OFF
OFF
Stopping/Waiting
Servo OFF
Servo ON
Item
0, 1 to 163840 (PLS)
0: restart not allowed
Restart allowable range (10000 PLS)
DMOVP K10000 D0
is stored in D0, D1.
Data for D0, D1 is stored in buffer
memory 64, 65 of the QD75.
5 - 45
MELSEC-Q
Stopping/Waitting
Servo ON
Servo OFF Waitting
Restart invalid
Restart valid
Servo ON
Setting range
Restart invalid
Restart valid
Restart invalid
Default value
0