Instruction manual
3.
SIGNALS AND WIRING
(b)
Analog torque command offset
Using parameter
No.
30,
the offset voltage of -999
to
+999mV can be added
to
the
TC
applied
voltage
as
shown below.
Max.
P
c
:I
//
Parameter No.30
I
-999
to
+999mV
off
set range
+8
(-8
)
'1
TC applied voltage
[VI
(2)
Torque
limit
By setting parameter
No.
28 (internal torque hit
l),
torque
is
always lunited
to
the maximum value
during operation.
A
relationshp between
hit
value and servo motor-generated torque
is
as
in
(2)
in
section
3.4.1.
Note
that the analog torque
hit
(TU)
is
unavdable.
(3)
Speed
limit
(a) Speed
limit
value and speed
The speed
is
lunited
to
the values set
in
parameters
No.
8
to
10
(internal speed
hits
1
to
3)
or the
value set in the applied voltage of the analog speed limit
(VLA).
A
relationship between the analog speed
hit
(VLA)
applied voltage and the servo motor speed
is
shown below.
When the motor speed reaches the speed
hit
value, torque control may become unstable. Make the
set value more than 100r/m smaller than the desired speed limit value.
Rated speed
Forward rotation (CCW
~ CCW direction
CW direction
I
VLA applied voltage
[Vj
___._-
Rated speed
1
"\
Reverse rotation (CW)
The following table indicates the limit direction according to forward rotation selection
(RSl)
and
reverse rotation selection
(RS2)
combination:
(Note) External Input Signals Speed Limit Direction
RS1
RS2
Analog Speed Limit (VU)
Internal Speed
+
Polarity
Commands
-
Polarity
1
CR' CCR' CW
1
0
CCR' CW
ccw
0
Note.0: RSlRS2-SG
off
(open)
1:
RSlIRS2-SG on (short)
Generally, make connection as shown below:
Servo arndifier
I
~ SP2
:I::$
2w2
vc
LG
SD
Japan Resistor
- - -
-
RRSlO
or equivalent
3-
27