Mitsubishi Electric MELSEC-L LD75D, User Manual

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(3) Order of priority for stop process
The order of priority for the LD75 stop process is as follows.
Deceleration stop < Sudden stop < Immediate stop
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 "[Cd.42] Stop
command processing for deceleration stop selection".
(Refer to

Page 606, Section 12.7.9 for details.)
[Manual control]
• Independently of the [Cd.42] setting, a deceleration curve is re-processed from the speed at stop cause
occurrence.
[OPR control, positioning control]
• When [Cd.42] = 0 (deceleration curve re-processing): A deceleration curve is re-processed from the speed
at stop cause occurrence.
• When [Cd.42] = 1 (deceleration curve continuation): The current deceleration curve is continued after stop
cause occurrence.
If the stop signal ON or stop cause specified for a sudden stop occurs during deceleration, sudden stop process
will start at 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.
Ex.
The process when a sudden stop cause occurs during deceleration stop is shown below.
Operation will stop immediately if the target reaches the positioning address specified in the currently executed
positioning data during deceleration of position control.
(a) In the case of deceleration stop time > sudden stop deceleration time (b) In the case of deceleration stop time < sudden stop deceleration time
Positioning speed
Deceleration
stop process
Stop
Sudden
stop cause
Sudden stop deceleration process
Deceleration stop process
continues
Process for
sudden stop
Positioning speed
Deceleration
stop process
Stop
Sudden
stop cause