Mitsubishi Electric MELSEC-L LD75P User Manual page 139

(8) [Pr.36] Sudden stop deceleration time
Set the time to reach speed 0 from "[Pr.8] Speed limit value" (When in the JOG operation control, from the
"[Pr.31] JOG speed limit value".) during the sudden stop. The illustration below shows the relationships with other
parameters.
1) Positioning start
When positioning is started,
the acceleration starts following
the "acceleration time".
Pr.8
Speed limit
value
Da.8
Command
speed
Actual accel-
eration time
Acceleration time
(9) [Pr.37] Stop group 1 sudden stop selection to [Pr.39] Stop group 3 sudden stop
selection
Set the method to stop when the stop causes in the following stop groups occur.
• Stop group 1: Stop with hardware stroke limit
• Stop group 2: CPU module error occurrence, PLC READY signal [Y0] OFF, Fault in test function
• Stop group 3: External stop signal (Stop signal from CPU module, Stop signal from GX Works2, Error
occurrence (excludes errors in stop groups 1 and 2: includes only the software stroke limit errors during JOG
operation, speed control, speed-position switching control, and position-speed switching control))
The methods of stopping include "0: Normal deceleration stop" and "1: Sudden stop".
If "1: Sudden stop" is selected, the axis will suddenly decelerate to a stop when the stop cause occurs.
2) Sudden stop cause occurrence
When a "sudden stop cause" occurs,
the deceleration starts following the
"sudden stop deceleration time".
Actual sudden stop
deceleration time
Pr.36
Sudden stop
deceleration time
Acceleration time 0
Pr.9
Acceleration time 1
Pr.25
Acceleration time 2
Pr.26
Acceleration time 3
Pr.27
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
3) Positioning stop
When a "sudden stop cause"
does not occur, the decelera-
tion starts toward the stop
position following the "decel-
eration time".
Actual decel-
eration time
Deceleration time
Deceleration time 0
Pr.10
Deceleration time 1
Pr.28
Deceleration time 2
Pr.29
Deceleration time 3
Pr.30
5
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