2 CONTROL MODE
2.2 Control mode [A]
73
2
Speed control mode (S)
Set [Pr. PA01.0] to "2" (Speed control mode).
The speed can be controlled with the servo parameter setting or with the applied voltage of VC (Analog speed command).
Speed setting
■
Speed command and speed
The servo motor is operated at the speed set in the servo parameter or at the speed set in the applied voltage of VC (Analog
speed command). The relation between the applied voltage in VC (Analog speed command) and the servo motor speed is
shown below.
The rated speed is achieved at ±10 V in the initial setting. The speed at ±10 V can be changed with [Pr. PC12 Analog speed
command - Maximum speed].
The rotation direction can be selected by using ST1 (Forward rotation start), ST2 (Reverse rotation start), or VC (Analog
speed command).
*1 0: OFF
1: ON
*2 If the torque limit is canceled during servo-lock, the servo motor may suddenly rotate, depending on the amount of the position deviation
from the command position.
For linear servo motors, CCW is the positive direction and CW is the negative direction.
Input device
Rotation direction
ST2
ST1
VC (Analog speed command)
Internal speed
Polarity: +
0 V
Polarity: -
0
0
Stop (servo-lock)
Stop (servo-lock)
Stop (servo-lock)
Stop (servo-lock)
0
1
CCW
Stop (no servo-lock)
CW
CCW
1
0
CW
CCW
CW
1
1
Stop (servo-lock)
Stop (servo-lock)
Stop (servo-lock)
Stop (servo-lock)
0
+10
-10
Rated speed [r/min]
Speed
[r/min]
CCW direction
VC applied voltage [V]
CW
direction
Rated speed [r/min]
Forward rotation (CCW)
Forward rotation (CCW)
Reverse rotation (CW)
Reverse rotation (CW)