LS ELECTRIC L7NHF Series, User Manual

Page: 131 / 409

5. Drive Application Functions
5-23
5.4.2
Servo-lock Function
During velocity control operation, the servo position cannot be locked even when 0 is entered for the
speed command. This is due to the characteristic of velocity control. Here, you can lock the servo
position by enabling the servo-lock function select (0x2311).
Setting Value Setting details
0 Servo-lock function disabled
1 Servo-lock function enabled
Using the servo-lock function, you can internally control the positions based on the position of 0 speed
command input. If you input a speed command other than 0, the mode switches to normal velocity
control.
5.4.3
Velocity Control Signals
As shown in the figure below, when the value of speed feedback is below the ZSPD output range
(0x2404), a ZSPD (zero speed) signal is output; and when it is above the TGON output range (0x2405),
a TGON (motor rotation) signal is output.
Speed
Time
Motor Velocity
ZSPD Output
Range
TGON Output
Range
ZSPD
TGON
In addition, if the difference between the command and the speed feedback (i.e., velocity error) is
below the INSPD output range (0x2406), an INSPD (velocity match) signal is output.

Related Objects
Index
Sub
Index
Name
Variable
Type
Accessibility
PDO
Assignment
Unit
0x2404 - ZSPD Ouput Range UINT RW Yes rpm
0x2405 - TGON Ouput Range UINT RW Yes rpm
0x2406 - INSPD Ouput Range UINT RW Yes rpm