Mitsubishi Electric MELSEC-QD75MH1 User Manual page 149

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
QD75MH 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
QD75MH 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
QD75MH 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.84 Restart allowable range
364 514
setting when servo OFF
365 515
changes 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
Servo OFF Stopping/Waiting
Servo ON
Item
0, 1 to 327680 (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 QD75MH.
5 - 48
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