Veichi SD780 Series, Manual, Page: 86 / 284

5 Operation
80 SD780 Series Servo Technical Manual
2. Internal speed
Function
code
Parameter Range Default Unit
Communication
address
When enabled
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 3 internal
speed commands and selects A and B through the switching value internal speed
command. When the switching value internal speed command selects A and B at
OFF state, the internal speed is default as 0.
The speed is selected through the digital input signal control:
Switching value input signal
Direction of speed instruction Speed instruction
/SPD-D /SPD-A /SPD-B
OFF
OFF OFF
Positive
0
OFF ON Internal speed 1(Pn304)
ON ON Internal speed 2(Pn305)
ON OFF Internal speed 3(Pn306)
ON
OFF OFF
Negative
0
OFF ON Internal speed 1(Pn304)
ON ON Internal speed 2(Pn305)
ON OFF Internal speed 3(Pn306)
5.3.3 Soft Start
The soft start function is a speed command that converts a step speed command to a smoother
constant acceleration/deceleration. You can set the acceleration time and deceleration time, and
use this function when you want to achieve smooth speed control during speed control.
Function
code
Parameter Range Default Unit
Communication
address
When enabled
Pn310
Speed
command
trapezoidal
acceleration
time
0
～
10000
0 ms 0x0310 Immediately
Acceleration time of the set speed is from 0r/min to the max speed (corresponding
to the motor model). When the given speed is more or less than the max speed,
the actual acceleration time is calculated in proportion.