10 Function Code Instructions
225 SD780 Series Servo Technical Manual
10.4 Pn3 Group Speed Related Parameters
Function
code
Parameter
Range
Default
Unit
Communication
address
When
enabled
Pn300
Analog speed
command gain
150
~
3000
600
0.01V/
rated
speed
0x0300
Immediately
Use this parameter to set the analog voltage value of (V-REF) when the speed of servo motor is rated
speed.
Note: do not apply a voltage above - 10
~
10V. Exceeding this range may cause damage to the
drive.
Pn301
Reversed analog
speed command
0
~
1
0
-
0x0301
Immediately
Set the voltage polarity of the analog speed command:
0- Positive polarity: positive voltage corresponds to positive speed command.
1- Negative polarity: positive voltage corresponds to negative speed command.
Pn302
Analog speed
instruction filter time
0
~
655.35
0.40
ms
0x0302
Immediately
The function could be set to smooth the speed command when one delay filter is applied to the
analog speed command (V-REF) input and it does not usually need to be changed. If the set value is
too large, the responsiveness may decrease. Please set this parameter while confirming the
response.
Pn303
Analog speed
command dead
zone range
0
~
3
0
V
0x0303
Immediately
In the analog speed control, even if the input command is 0V, the servo motor may rotate at a slight
speed. This is because there is a slight deviation in the commands inside the servo unit. This error can
be eliminated by setting an appropriate analog speed command deadband range.
Pn304
Pn305
Pn306
Internal speed 1
0
~
10000
100
rpm
0x0304
Immediately
Internal speed 2
0
~
10000
200
rpm
0x0305
Immediately
Internal speed 3
0
~
10000
300
rpm
0x0306
Immediately
When operating in the internal speed mode, the servo unit provides three internal speed commands
and through Switch Internal Speed Command Selection A and B we could select as follow:
/SPD-A /SPD-B Speed Command
OFF OFF Zero Speed
OFF ON Internal speed 1
ON ON Internal speed 2
ON OFF Internal speed 3
Pn310
Speed command
trapezoidal
acceleration time
0
~
30000
0
ms
0x0310
Immediately
Acceleration of the set speed from 0r/min to the rated speed (corresponding to the motor model).
When the given speed is greater or less than the rated speed, the actual acceleration time is
calculated in proportion.
Pn311
Speed command
trapezoidal
deceleration time
0
~
30000
0
ms
0x0311
Immediately
Acceleration time of the set speed from to the rated speed (corresponding to the motor model) to
0r/min. When the given speed is greater or less than the rated speed, the actual acceleration time is
calculated in proportion.