5 Operation
85 SD780 Series Servo Technical Manual
5.4.1Quick Guide
5.4.2 Basic Setting
Torque control is the operation method of inputting the torque command to the servo unit and
controlling the output of the servo motor through the size of the torque command.
When (torque command selection source) pn400 = 0, the internal torque command gives the
torque, and the torque value is directly set by the parameter pn410. In this way, the internal torque
can be given by writing the address 0x0410 through RS-485. When pn400 = 1, it is an analog
torque command, and the torque command is given according to the voltage connected to t-ref
(cn1-9, cn1-10) and the set value of pn405 (analog torque command gain).
Enable operation
Monitoring Un102, receiving torque
follows given changes?
Connect each part properly
Drive panel display is normal
The
Host
system is given a fixed
voltage T
-
REF
Confirm the wiring (T
-
REF)
See
d
etails
In "
Analog Input Circuit
"
No
Yes
Is the
running
direction
same
with
the given?
Confirm Pn406 setting direction
Yes
No
Is the actual torque consistent
with the given?
Confirm analog torque command
related settings
Pn404, Pn405, Pn407, Pn413
Yes
No
Run response to meet
requirements?
Gain adjustment
See "Adjustment
Instructions" for details
No
Yes
Q
uick
Guide
E
nd
Torque Control
Quick Guide
Internal torque command Pn410
Internal torque command
(Pn400 = 0)
Analog torque command
(Pn400=1)
