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8.12 Manual Tuning
8.12.2 Compatible Adjustment Functions
8-78
Examples of Connections to Host Controllers
When SERVOPACK Performs Speed Control
When SERVOPACK Performs Position Control
Related Parameters
Torque Feedforward
Torque feedforward is allocated to T-REF (Pn002 = n.
X) and it is set using the torque ref-
erence input gain (Pn400) and T-REF filter time constant (Pn415).
The default setting of Pn400 is 30. Therefore, if the torque feedforward value is
±
3 V, then the
torque is limited to
±
100% of the rated torque.
Parameter
Meaning
When Enabled
Classification
Pn002
n.
0
(default setting)
Do not use T-REF.
After restart
Setup
n.
1
Use T-REF as an external torque limit input.
n.
2
Use T-REF as a torque feedback input.
n.
3
Use T-REF as an external torque limit input
when /P-CL or /N-CL is active.
Pn400
Torque Reference Input Gain
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
10 to 100
0.1 V/rated torque
30
Immediately
Setup
Pn415
T-REF Filter Time Constant
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
0 to 65,535
0.01 ms
0
Immediately
Setup
Pn002
= n.
X
K
p
: Po
s
ition loop gain
K
FF
: Feedforward gain
Pn000
= n.
X
Ho
s
t controller
S
ERVOPACK (
s
peed control)
M
Pn400
T-REF
V-REF
K
FF
K
P
Pn
3
00
Pn
3
07
Pn
3
0C
Pn415
Pn426
ENC
S
peed feedforward
average movement time
Encoder
divided pul
s
e
output
Linear
S
ervomotor: Pn281
Rotary
S
ervomotor: Pn212
Divider
S
peed feedback
S
peed
conver
s
ion
Current feedback
Current
control
s
ection
S
peed
control
s
ection
S
peed reference
filter time con
s
tant
S
peed reference
input gain
Torque reference
input gain
T-REF filter time
con
s
tant
Torque feedforward
average movement time
Power
amplifier
S
ervomotor
Po
s
ition
reference
Differ-
ential
Differ-
ential
Analog
Ho
s
t controller
COIN
M
Pn400
T-REF
V-REF
CLR
K
FF
Pn
3
00
Pn
3
07
Pn
3
0C
Pn415
Pn426
ENC
Pn218 Pn20E
Pn210
Pn216
Pn217
K
FF
S
ervomotor
Power
amplifier
Pn522
Po
s
itioning
completed width
PUL
S
,
S
IGN
B
A
Pn200
= n.
X
Pn000
= n.
X
Pn000
= n.
X
Pn002
= n.
X
Differ-
ential
Clear
s
ignal
input
Encoder divided
pul
s
e output
K
FF
: Feedforward gain
Linear
S
ervomotor: Pn281
Rotary
S
ervomotor: Pn212
Divider
Po
s
ition
feedback
S
peed feedback
Current feedback
Current
control
s
ection
S
peed
control
s
ection
Po
s
ition control
s
ection
Deviation
counter
S
moo-
thing
Electronic
gear
Reference
pul
s
e input
multiplier
Refer-
ence
pul
s
e
form
S
peed feedforward
average movement time
S
peed reference
filter time con
s
tant
S
peed reference
input gain
Torque feedforward
average movement time
T-REF filter time con
s
tant
Torque reference
input gain
S
ERVOPACK (po
s
ition control)
S
peed
conver
s
ion
Po
s
ition
reference
Differ-
ential
Differ-
ential
Analog
Speed
Position
Torque
Speed
Position
Torque