Mitsubishi Electric RD77MS2 User Manual page 30

Order of priority for stop process
The order of priority for the Simple Motion module stop process is as follows.
(Deceleration stop) < (Sudden stop) < (Servo OFF)
• 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". (Page 269 Stop command processing for deceleration stop function)
Positioning control
during deceleration
Manual control
Home position return control,
positioning control
• 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
(a) When deceleration stop time >
sudden stop deceleration time
Inputting the stop signal during deceleration
• Even if stop is input during deceleration (including automatic deceleration), the operation will stop at that deceleration
speed.
• If stop is input during deceleration for home position return, the operation will stop at that deceleration speed. If input at the
creep speed, the operation will stop immediately.
• 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.
1 START AND STOP
28
1.2 Stop
Setting value of [Cd.42] Processing details

Independently of the [Cd.42] setting, a deceleration curve is re-processed from the speed at
stop cause occurrence.
0: Deceleration curve re- A deceleration curve is re-processed from the speed at stop cause occurrence. (Page 269
processing Deceleration curve re-processing)
1: Deceleration curve The current deceleration curve is continued after stop cause occurrence. (Page 269
continuation Deceleration curve continuation)
Deceleration stop
process
Sudden stop cause
Stop
Deceleration stop process continues
Deceleration stop
process
Positioning speed
Process for sudden stop
(b) When deceleration stop time <
sudden stop deceleration time
Sudden stop cause
Stop