Mitsubishi Electric MELSEC-L LD75D, User Manual

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137
CHAPTER 5 DATA USED FOR POSITIONING CONTROL
5
5.
2
List
of
P
a
ramet
e
rs
(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.
(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.
When positioning is started,
the acceleration starts following
the "acceleration time".
1) Positioning start 2) Sudden stop cause occurrence
When a "sudden stop cause" occurs,
the deceleration starts following the
"sudden stop deceleration time".
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 accel-
eration time
Actual sudden stop
deceleration time
Acceleration time
Actual decel-
eration time
Deceleration time
Speed limit
value
Pr.8
Command
speed
Da.8
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
Deceleration time 0
Pr.10
Deceleration time 1
Pr.28
Deceleration time 2
Pr.29
Deceleration time 3
Pr.30