Soft Start Settings; Speed Reference Filter - YASKAWA SGD7S series Product Manual
Sigma-7-series ac servo drive.
sigma-7s servopack with
analog voltage/pulse train references
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Also See for SGD7S series:
- Product manual (621 pages) ,
- Selection manual (337 pages) ,
- Product manual (285 pages)
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6.5 Speed Control
6.5.2 Soft Start Settings
6.5.2
Soft Start Settings
The soft start function takes a stepwise speed reference input and applies the specified accel-
eration/deceleration rates to convert it to a trapezoidal speed reference.
You specify the acceleration/deceleration rates in Pn305 (Soft Start Acceleration Time) and
Pn306 (Soft Start Deceleration Time).
Use this function to perform smoother speed control (including internal set speed control).
Pn305
Pn306
Pn305: The time required for the Servomotor to accelerate from a stopped state to the maxi-
mum motor speed.
Pn306: The time required for the Servomotor to decelerate from the maximum motor speed to
a stopped state.
You can calculate the actual acceleration/deceleration times with the following formulas.
6.5.3
Speed Reference Filter
The speed reference filter is a first order lag filter that is applied to the V-REF (Speed Reference
Input) signal.
You set the speed reference filter in Pn307 (Speed Reference Filter Time Constant).
It is normally not necessary to change this parameter. If the setting is too high, the response to
the speed reference may be slowed down. Monitor the response to the speed reference as you
set this parameter.
Pn307
6-24
Meaning
When Enabled
Soft Start Acceleration Time
Setting Range
0 to 10,000
Soft Start Deceleration Time
Setting Range
0 to 10,000
Target peed
Actual acceleration time =
Maximum peed
Target peed
Actual deceleration time =
Maximum peed
Maximum peed
Target peed
Actual
acceleration
time
Pn 05
Speed Reference Filter Time Constant
Setting Range
0 to 65,535
Setting Unit
Default Setting
1 ms
0
Setting Unit
Default Setting
1 ms
0
× oft tart acceleration time (Pn 05)
× oft tart deceleration time (Pn 06)
Actual
deceleration
time
Pn 06
Setting Unit
Default Setting
0.01 ms
40
Speed
When Enabled
Classification
Immediately
Setup
Speed
When Enabled
Classification
Immediately
Setup
Speed
Position
Torque
When Enabled
Classification
Immediately
Setup
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Troubleshooting
