Yaskawa SGDB User Manual

Page 107

3.2 Setting Parameters According to Host Controller

• This function cannot be used with the function for torque restriction by analog voltage

reference, described in Section 3.2.9 Using Torque Restriction by Analog Voltage Ref-
erence.

• For parameters and control modes, refer to Appendix C List of Parameters.

Setting a Torque Feed-forward Value in Parameter Cn-13

The factory setting is Cn-13 = 30. If, for example, the torque feed-forward value is 3 V,

torque is restricted to 100% (rated torque).

Cn-13

TCRFGN

Torque Reference

Gain

Unit: 0.1

V/Rated

Torque

Setting

Range:

10 to 100

Factory

Setting:

For Speed/Torque

Control Only

3.2.9 Using Torque Restriction by Analog Voltage Reference

For speed control (analog reference) only.

This function restricts torque by assigning the T-REF terminal (1CN-9, 1CN-10) a torque
limit value in terms of analog voltage. Since torque reference input terminal T-REF is
used as an input terminal, this function cannot be used for torque control.

Torque limit value

Speed reference

Speed loop

gain (Cn-04)

Integration

(Cn-05)

Torque limit value

Torque

reference

Speed feedback

Schematic Block Diagram for Torque Restriction by Analog Voltage Reference

How to Use Torque Restriction by Analog Voltage Reference

To use this torque restriction function, set the following memory switch to 1.

Cn-02 Bit 8

Torque Restriction by Analog

Voltage Reference

Factory

Setting: 0

For Speed/Torque Control

Only

Enables this torque restriction function.

To use this function, input a speed reference to the V-REF terminal and a torque limit val-
ue to the T-REF terminal.