
B–65162E/03
10. INTERFACE SIGNALS
407
D This function allows an analog voltage input to the spindle amplifier
to apply an override to the frequency command.
D The analog override function is valid only in the normal control mode.
D The analog override function is valid when this signal is 1.
D The following parameter sets the upper limit of the analog override.
The input voltage value that corresponds with the frequency of the
upper limit of analog override is 4.5 V across OVR2 and 0V. (An input
more than 4.5 V does not make excess of the maximum frequency).
Even if an overridden frequency command exceeds the value set with
the max. frequency parameter, the frequency is clamped to the
maximum frequency.
#7 #6 #5
ALGOVR
#4 #3 #2 #1 #0
1st Spindle : 6506 3006 4006
2nd Spindle: 6646 3146
FS0 FS15 FS16
(Parameter No.)
ALG OVR =0 : Upper limit 100%
=1 : Upper limit 120%
D A system configuration in relation with the analog override function
is as follows:
Machine
operator’s
panel
Spindle
amplifier
module
Analog
input
OVR1
OVR2
Override
valid/invalid
PMC CNC
OVRA
Connection about the analog override input is as follows:
The override unit is 1%.
Spindle amp module
JY1
(Nominal voltage) OVR1
(Analog input) OVR2
(0V) 0V
Shield wire
Machine operator’s
panel
VR
V1
Use the resistor(VR + R1) of 2 kΩ to 10 kΩ .
D When the analog override function valid/invalid switch signal is
switched, or when the override upper limit parameter is switched, the
motor speed may change radically. Therefore switch the signal or
parameter when the spindle is stopped.
10.4.15
Spindle Analog
Override Command
(OVRA)