CHAPTER 2 WIRING
Description of I/O Signals 2-53
2
ON OFF OFF PA1_44 Manual feed speed 4
ON OFF ON PA1_45 Manual feed speed 5
ON ON OFF PA1_46 Manual feed speed 6
ON ON ON PA1_47 Manual feed speed 7
(2) Under torque control
The rotation speed of the servomotor is limited with the speed selected with multi-step speed [X1],
[X2] and [X3].
The speed limit under torque control is shown in the table below.
X3 X2 X1 Parameter No. Speed limit for enabling
OFF OFF OFF - Speed command voltage (VREF)
OFF OFF ON PA1_41 Speed limit 1
OFF ON OFF PA1_42 Speed limit 2
OFF ON ON PA1_43 Speed limit 3
ON OFF OFF PA1_44 Speed limit 4
ON OFF ON PA1_45 Speed limit 5
ON ON OFF PA1_46 Speed limit 6
ON ON ON PA1_47 Speed limit 7
Parameter setting
To assign multi-step speed selection to a sequence input terminal, specify the corresponding value
("51," "52" or "53") to the input terminal function setting parameter.
Free-run [BX]: Sequence input signal (Reference value 54)
To put the servomotor forcibly into free-run (coast-to-stop).
Priority is given to this signal in all control modes.
Function
While the free-run [BX] signal assigned to a CONT input signal remains turned on, the output of the
servo amplifier is shut off and the servomotor free-run.
The output shaft of the servomotor decelerates (accelerates) according to the torque of the load.
The free-run signal is enabled in all control modes (position control, speed control and torque
control modes).
Under position control, the number of output pulses sent from the host controller deviates from the
revolution amount of the servomotor because the servomotor free-run while the signal remains
turned on.
Under speed control and torque control, as the servomotor automatically become free-run, in case
it is used for vertical transportation purpose, note that there is a risk of falling.
Parameter setting
To assign free-run to a sequence input terminal, specify the corresponding value ("54") to the input
terminal function setting parameter.
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