Torque Limiting Using An Analog Voltage Reference - YASKAWA SGM H Series User Manual

8 Operation

8.9.3 Torque Limiting Using an Analog Voltage Reference

8.9.3 Torque Limiting Using an Analog Voltage Reference
Torque limiting by analog voltage reference limits torque by assigning a torque limit in an analog voltage to the
T-REF terminals (CN1-9 and 10). This function can be used only during speed or position control, not during
torque control.
Refer to the following block diagram when the torque limit with an analog voltage reference is used for speed
control.
Torque limit
value
Speed
reference
There is no polarity in the input voltage of the analog voltage reference for torque limiting. The absolute values of both +
INFO and - voltages are input, and a torque limit value corresponding to that absolute value is applied in the forward or reverse
direction.
(1) Related Parameters
Parameter
n.
Pn002
When n. 2 is set, the T-REF terminal is used for torque feed-forward input, but the functions cannot be used together.
(2) Input Signals
Type Signal
Name
Input T-REF
SG
The torque limit input gain is set at parameter Pn400. Refer to 8.7.1 Setting Parameters.
Input Specifications
±
• Input range:
• Maximum allowable input voltage:
8-72
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SERVOPACK
Torque reference
T-REF
input gain
(Pn400)
Speed
Speed loop
refer-
gain
+
V-REF ence
(Pn100)
input
-
gain
(Pn300)
Speed feedback
1
Speed control option: Uses the T-REF terminal to be used as an external torque limit input.
Connector
Pin Number
CN1-9
CN1-10
±
1 VDC to 10 VDC/rated torque
±
12 VDC
+
Speed loop
integral
time
constant Reverse torque
(Pn101)
value (Pn403)
Meaning
Torque reference input
Signal ground for torque reference input
Forward torque
value (Pn402)
Torque
reference
Name