3. SIGNALS AND WIRING
3 - 44
(c) SA (Speed reached)
As in section 3.6.2 (2)
3.6.5 Speed/torque control switching mode
Set " _ _ _ 3" in [Pr. PA01] to switch to the speed/torque control switching mode.
(1) LOP (control switching)
Use LOP (Control switching) to switch between the speed control mode and the torque control mode with
an external contact. The following shows a relation between LOP and control modes.
The control mode may be switched at any time. The following shows a switching timing chart.
LOP
(Control switching)
Servo motor speed
TC
(Analog torque command)
ON
OFF
10 V
0 V
(Note)
Load torque
Speed control
mode
Torque control
mode
Speed control
mode
Forward rotation
in driving mode
When ST1 (Forward rotation start) and ST2 (Reverse rotation start) are switched off
as soon as a mode is switched to the speed control, the servo motor comes to a
stop according to the deceleration time constant. A shock may occur at switching
control modes.
(2) Speed setting in speed control mode
As in section 3.6.2 (1)
(3) Torque limit in speed control mode
As in section 3.6.1 (5)
(4) Speed limit in torque control mode
(a) Speed limit value and speed
The speed is limited to the limit value of the parameter or the value set in the applied voltage of VLA
(Analog speed limit).
A relation between the VLA (Analog speed limit) applied voltage and the limit value is as in section
3.6.3 (3) (a).
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