Mitsubishi Electric MELSEC-Q QD75M User Manual page 325

6 PLC PROGRAM USED FOR POSITIONING CONTROL
[3] Order of priority for stop process
The order of priority for the QD75 stop process is as follows.
Deceleration stop < Sudden stop < Servo OFF
(1) If the deceleration stop command ON (stop signal ON) or deceleration stop
cause occurs during deceleration to speed 0 (including automatic
deceleration), operation changes depending on the setting of "
command processing for deceleration stop selection".
(a) Manual control
Independently of the
from the speed at stop cause occurrence.
(b) OPR control, positioning control
•
When Cd.42
A deceleration curve is re-processed from the speed at stop cause
occurrence.
•
When Cd.42
The current deceleration curve is continued after stop cause occurrence.
(For details, refer to Section 12.7.10 "Stop command processing for
deceleration stop function".)
(2) If the stop signal designated for sudden stop turns ON or a stop cause occurs
during deceleration, the sudden stop process will start from that point.
However, if the sudden stop deceleration time is longer than the deceleration
time, the deceleration stop process will be continued even if a sudden stop
cause occurs during the deceleration stop process.
Example
The process when a sudden stop cause occurs during deceleration stop is shown below.
Positioning speed
Sudden stop deceleration process
[4] Inputting the stop signal during deceleration
(1) Even if stop is input during deceleration (including automatic deceleration), the
operation will stop at that deceleration speed.
(2) If stop is input during deceleration for OPR, the operation will stop at that
deceleration speed. If input at the creep speed, the operation will stop
immediately.
(3) If a stop cause, designated for sudden stop, occurs during deceleration, the
sudden stop process will start from that point.
The sudden stop process during deceleration is carried out only when the
sudden stop time is shorter than the deceleration stop time.
setting, a deceleration curve is re-processed
Cd.42
= 0 (deceleration curve re-processing):
= 1 (deceleration curve continuation):
Positioning speed
Deceleration
stop process
Sudden
stop cause
Stop
Deceleration stop process continues
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MELSEC-Q
Cd.42 Stop
Deceleration
stop process
Sudden
stop cause
Stop
Process for sudden stop