Acceleration/Deceleration Processing Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Acceleration/deceleration processing function

The "acceleration/deceleration processing function" adjusts the acceleration/deceleration of each control to the acceleration/
deceleration curve suitable for device.
Setting the acceleration/deceleration time changes the slope of the acceleration/deceleration curve.
The following two methods can be selected for the acceleration/deceleration curve:
• Trapezoidal acceleration/deceleration
• S-curve acceleration/deceleration
Refer to the following for acceleration/deceleration processing of speed-torque control.
Page 191 Speed-torque Control
"Acceleration/deceleration time 0 to 3" control details and setting
In the Motion module, four types each of acceleration time and deceleration time can be set. By using separate acceleration/
deceleration times, control can be carried out with different acceleration/deceleration times for positioning control, JOG
operation, and home position return.
Set the required values for the acceleration/deceleration time in the parameters shown in the following table, and write them to
the Motion module.
The set details are validated when written to the Motion module.
Setting item
[Pr.9] Acceleration time 0
[Pr.25] Acceleration time 1
[Pr.26] Acceleration time 2
[Pr.27] Acceleration time 3
[Pr.10] Deceleration time 0
[Pr.28] Deceleration time 1
[Pr.29] Deceleration time 2
[Pr.30] Deceleration time 3
Refer to the following for the setting details.
Page 411 Basic Setting
"Acceleration/deceleration method setting" control details and setting
In the "acceleration/deceleration method setting", the acceleration/deceleration processing method is selected and set. The
set acceleration/deceleration processing is applied to all acceleration/deceleration. (except for inching operation, manual
pulse generator operation and speed-torque control.)
The two types of "acceleration/deceleration processing method" are shown below.
■Trapezoidal acceleration/deceleration processing method
This is a method in which linear acceleration/deceleration is carried out based on the acceleration time, deceleration time, and
speed limit value set by the user.
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8 CONTROL SUB FUNCTIONS
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8.8 Other Functions
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Setting Setting details
value
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Set the acceleration time at a value within the range of 1 to 8388608 ms.
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Set the deceleration time at a value within the range of 1 to 8388608 ms.
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Factory-set initial value
1000
1000
1000
1000
1000
1000
1000
1000