YASKAWA SGD7S-R70A20A023F40B, Product Manual

Page: 66 / 342

3.6 Setup Procedure
3.6.6 Settings prior to Pressure Feedback Control Operation
3-16
3.6.6 Settings prior to Pressure Feedback Control Operation
1.
Enable pressure feedback with the Pressure Feedback Selection Switch (Pn440 =
n.

1).
Note: As a rule, use the default settings for the following parameters.
2.
Set Pn44C (Pressure Feedback Enable Level) and Pn44D (Pressure Feedback Overflow
Detection Level) to suitable values for the system.
3.
Set Pn407 (Speed Limit during Torque Control) or Pn480 (Speed Limit during Force Con-
trol).
Parameter Meaning When Enabled Classification
Pn440
n.

0
(default setting)
Disable pressure feedback control and
perform normal torque control.
After restart Setup
n.

1 Enable pressure feedback control.
Pn448
Pressure Feedback Offset
Setting Range Setting Unit Default Setting When Enabled Classification
-10,000 to 10,000 0.01% 0 Immediately Setup
Pn44A
Pressure Feedback Filter
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 65,535 0.01 ms 0 Immediately Setup
Pn44E
Pressure Feedback Overflow Detection Time
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 5,000 0.1 ms 0 Immediately Setup
Pn44C
Pressure Feedback Enable Level
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 10,000 0.01% 1000 Immediately Setup
Pn44D
Pressure Feedback Overflow Detection Level
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 800 1% 300 Immediately Setup
Pressure feedback control will be enabled at or above Pn44C and below Pn44D.
Torque
Torque
Torque
Torque
Torque
Information
*
Even if a Pressure Feedback Overflow Warning (A.922) occurs, pressure feedback control will
be enabled again when the pressure feedback detection value decreases to below Pn44D.
Execute the ALM_CLR command to reset the warning.
Pressure
Feedback
Detection
Value
Pressure
Feedback
Control
Pressure
Feedback
Overflow
Warning
(A.922)
*
Remarks
Less than
Pn44C
Disabled No
If the pressure feedback detection value is less than the set-
ting of the Pressure Feedback Enable Level, the system
assumes that pressing does not need to be started and pres-
sure feedback control is not performed. Normal torque control
is performed. Set the value as a percentage of the rated
torque.
Note: Processing is performed to determine if pressing is
enabled or disabled, so set as small a value as possible.
Equal to or
greater
than
Pn44C and
less than
Pn44D
Enabled No –
Equal to or
greater
than
Pn44D
Disabled Yes
If the pressure feedback value exceeds the setting of the Pres-
sure Feedback Overflow Detection Level, it is treated as an
error and a Pressure Feedback Overflow Warning (A.922) is
output after the time set in Pn44E (Pressure Feedback Over-
flow Detection Time) elapses. Set the value as a percentage of
the rated torque.
Note: If Pn44D is set to 800, an error will not be detected and
a warning will not occur.