
B–64113EN–1/01
1. AXIS CONTROL
20
When position control is disabled for the controlled axes (when the servo
is off, during emergency stop, or during a servo alarm), if the machine is
moved, a positional error occurs. Follow–up is a function for changing
the current position of the CNC and reseting the error counter to zero.
Assuming a command corresponding to the error has been specified.
You can select whether to perform follow–up for axes when the servo is
turned off.
Follow–up is always performed during emergency stop or a servo alarm.
When signal *FLWU is 1 or bit 0 (FUPx) of parameter 1819 is 1,
follow–up is not performed. The error is added to the error counter as a
servo error. In this case, the machine moves to compensate for the error
when the servo off signal changes to 0.
In general, follow–up is not used if the machine is mechanically clamped
when position control is disabled for the controlled axes.
When *FLWU is “0”, the follow-up function is engaged. The present
position of the CNC is changed to reset the error counter to zero. The
machine tool remains in a deviated position, but since the present position
of the CNC changes correspondingly, the machine moves to the correct
position when the absolute command is next applied.
In general, follow–up should be used when motors are driven by
mechanical handles.
[Classification] Input signal
[Function] Select whether to perform follow–up when the servo is turned off for those
axes for which bit 0 (FUPx) of parameter 1819 is 0.
[Operation] 0: Performs follow–up.
1: Does not perform follow–up.
#7 #6 #5 #4 #3 #2 #1 #0
G007 *FLWU
1.2.7
Follow–up
General
D When follow–up is not
performed for the axes
for which the servo is
turned off
D When follow–up is
performed for the axes
for which the servo is
turned off
Signal
Follow–up signal
*FLWU <G007#5>
Signal address