Fuji Electric ALPHA7, User Manual

Page: 204 / 662

CHAPTER 4 PARAMETER
Basic Parameters
4-13
4
PA1_04 Rotation direction selection
No. Name Setting range
Default
value
Change
04
Rotation direction
selection 0: CCW rotation direction at forward command.
1: CW rotation direction at reverse command.
0 Power
This parameter keeps consistency between the direction of rotation of the servomotor and the traveling
direction of the machine.
In case of operation with pulse
The direction of rotation caused upon an input of a forward rotation pulse and high level command
sign or a B-phase pulse lead pulse with A / B phase pulse becomes the forward direction, making
the servomotor rotate forward.
To switch the phase of the output pulse, select the phase of counterclockwise (CCW) rotation of
the servomotor.
In case of operation with speed command voltage
The direction of rotation caused by a positive speed command voltage in a forward command
(FWD) signal is the forward direction, causing the servomotor to rotate forward.

Forward/Reverse rotation
The servomotor rotates forward if it rotates counterclockwise (CCW:
figure on the right) when the output shaft is viewed from the front.
Clockwise rotation is reverse rotation.
PA1_05 Number of command input pulses per revolution
No. Name Setting range
Default
value
Change
05
Number of command
input pulses per
revolution 0: Electronic gear is enabled
64 to 16777216 [pulses]: Number of
command input pulses per revolution is
enabled.
0 Power
This parameter is enabled only under position control.
Enter the number of command pulses necessary to rotate the servomotor a full turn.
The setting range is 64 to 1048576 [pulses]. However, if the end of the model number of the
servomotor is "HB2" (18-bit encoder), the maximum value is 262144 [pulses].
With the default value ("0"), the settings of PA1_06 and _07 (electronic gear numerator and
denominator) are enabled.
Forward
rotation