Limiting Torque With An Analog Reference - YASKAWA SGD7S Product Manual

6.11 Selecting Torque Limits

6.11.3 Limiting Torque with an Analog Reference

6.11.3 Limiting Torque with an Analog Reference

The analog voltage on the T-REF terminals (CN1-9 and CN1-10) is used to limit the torque with
an analog reference.
The smallest of the analog reference torque reference and the torque limits for Pn402
Pn403
*1.
Pn483 is used for a Linear Servomotor.
*2.
Pn484 is used for a Linear Servomotor.
The block diagrams for limiting the torque during speed control are provided below.
• Rotary Servomotors
Torque limit
Speed
reference input
Information
• Linear Servomotors
Force limit
Speed
reference input
Information
T-REF (Torque Reference Input) Signal
The input signal that is used for torque limits with an analog voltage reference is described
below.
Type
Input
6-66
*2
is used.
SERVOPACK
Pn400
T-REF
Torque Reference Input Gain
(Refer to 6.7.1.)
Pn300
V-REF
Speed Reference
Input Gain
(Refer to 6.5.1.)
There is no polarity for the input voltage of the analog voltage reference for the torque limit.
The absolute value of a positive or negative voltage is input, and a torque limit that corre-
sponds to that absolute value is applied in the forward and reverse directions.
SERVOPACK
Pn400
T-REF
Force reference input gain
(Refer to 6.7.1.)
Pn300
V-REF
Speed Reference
Input Gain
(Refer to 6.5.1.)
There is no polarity for the input voltage of the analog voltage reference for the force limit. The
absolute value of a positive or negative voltage is input, and a force limit that corresponds to
the absolute value of the input voltage is applied in the forward and reverse directions.
Signal Connector Pin No.
T-REF CN1-9
SG CN1-10
Pn415
T-REF Filter Time Constant
(Refer to 6.7.3.)
Speed
+
+
loop gain
–
Pn101
Speed Loop Integral
Time Constant
Speed feedback
Pn415
T-REF Filter Time Constant
(Refer to 6.7.3.)
Pn100
Speed
+
+
loop gain
–
Pn101
Speed Loop Integral
Time Constant
Speed feedback
Torque reference input
Signal ground for torque reference input
Pn402
Forward Torque
Limit
(Refer to 6.11.1.)
Pn100
Pn403
Reverse Torque Limit
(Refer to 6.11.1.)
Pn483
Forward Force Limit
(Refer to 6.11.1.)
Pn484
Reverse Force Limit
(Refer to 6.11.1.)
Name
*1
and
Torque
reference
Force
reference