MHT258a (Engl.)5-12
Selection of multistep speed
X3 X2 X1 Speed
OFF OFF OFF By speed command [NREF] terminal
OFF OFF ON Basic para. 1 (manual feed speed 1)
OFF ON OFF Basic para. 2 (manual feed speed 2)
OFF ON ON Basic para. 3 (manual feed speed 3)
ON OFF OFF Basic para. 4 (manual feed speed 4)
ON OFF ON Basic para. 5 (manual feed speed 5)
ON ON OFF Basic para. 6 (manual feed speed 6)
ON ON ON Basic para. 7 (manual feed speed 7)
・Rotational direction
The rotational direction of motor output shaft for the forward
command [FWD] can be changed by the system para. 80.
When the para. 80 is initial value, motor rotates in forward
direction (counterclockwise viewed from shaft extension)
for forward command. In case the motor rotates opposite
to the machine movement, set 1 at the para. 80. The
setting change of the system para. becomes valid after
turning on power again.
・Gain for speed command [NREF] terminal
At factory setting, the motor rotates forward at 5000[r/min]
against +10V of the speed command voltage.
By setting the system para. 63, the motor speed can be adjusted against the set speed command voltage.
Speed command voltage
*The value in ( ) is the setting value of system para. 63.
+10V
+5000r/min
-5000r/min
-10V
（×1.5）
（×1.0）
（×0.1）
Speed
If the system para. 63 has been set at 0.1, the speed can be adjusted to 500[r/min] against +10V of the speed command voltage.
・Resolution of speed command voltage
The speed command [NREF] terminal has a 14 bit resolution at full scale.
The torque command [TREF] terminal has a 10 bit resolution at full scale.
・Torque limiting
Motor output torque can be limited by using the torque limiting [TLMT] (30) signal. The torque limiting value can be selected by analog
voltage at torque command [TREF] terminal and parameter setting. For details, see 5.5 Signal for safety.
・S-curve acceleration/deceleration
S-curve acceleration/deceleration can be carried out by basic para. 25 setting.
The speed slowly increases by drawing an S-curve, and a shock during acceleration can be reduced.
See 6.1.5 Non-linear (S-curve) filter coefficient.
Foward
rotation
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