3.1 Introduction
3-3
3
Pr
essur
e Feedback Contr
ol
3.1
Introduction
Pressure feedback control is performed by inputting a feedback signal from a pressure sensor
to a MECHATROLINK-III pressure command (i.e., torque control command).
For the FT40 (11th to 13th digits in SERVOPACK model number: F40), an analog signal from a
pressure sensor built into the control target is passed through a pressure sensor amplifier and
then directly input to the CN1 connector on the SERVOPACK.
For the FT41 (11th to 13th digits in SERVOPACK model number: F41), MECHATROLINK-III
data from a pressure sensor built into the control target is passed through a pressure sensor
amplifier and through MECHATROLINK-III distributed I/O, then directly input to the CN6A and
CN6B connectors on the SERVOPACK.
Pressure feedback control can be used to perform high-speed, high-precision pressure control.
Pressure feedback control is performed in Torque Control Mode. It cannot be used in Speed
Control Mode or Position Control Mode. In pressure feedback control, you can only use posi-
tive torque references. You cannot use a negative torque reference. Change Pn000 = n.
X
(rotation direction selection) as necessary.
Stop the motor before you change from Speed Control Mode or Position Control Mode to
Torque Control Mode.
•
FT40
•
FT41
*
For MECHATROLINK-III distributed I/O, we recommend R7G4HML3-6-LC2 I/O Modules from M-System Co., Ltd.
Pre
ss
ure
feedback
control
proce
ss
ing
S
peed limit
proce
ss
ing
Filtering
Pre
ss
ure
s
en
s
or
AD
converter
Filtering
pre
ss
ure command
S
ERVOPACK
Analog
s
ignal:
-12 V to 12 V
MECHATROLINK-III
Ho
s
t controller
Motor
and
mechani
s
m
Pre
ss
ure
s
en
s
or
amplifier
CN1
MECHATROLINK-III
di
s
tributed I/O
*
MECHATROLINK-III
CN6A/6B
Pre
ss
ure
feedback
control
proce
ss
ing
S
peed limit
proce
ss
ing
Filtering
Pre
ss
ure
s
en
s
or
Filtering
pre
ss
ure command
S
ERVOPACK
Ho
s
t controller
Motor
and
mechani
s
m
Содержание SGD7S-R70A20A023F40B
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