Specifications

Comfort Reference Value – 5th Generation of STÖBER Inverters STÖBER
ANTRIEBSTECHNIK
8. Parameterizing the Speed and Torque Limits
KSW-55
Motor-generated torque limits
Enter a maximum motor torque and a maximum generated torque for the motor-
generated limitation. You can also change these limits with analog signals during
operation. Changing the motor-generated limitation is only useful with speed control. The
limitation does not become active until the display parameters C332 and C333 have a
value other than zero. This deactivates absolute limitation.
How to parameterize the motor-
generated limits ...
The motor-generated torque limits are parameterized on pages 8.2.1 (Figure 8-3 - motor)
and 8.2.2 (Figure 8-3 - generated) of the Assistant. Page 8.2 gives you an overview of
the entire limitation procedure. Proceed as shown below:
• On page 8.2.1 set the source of the motor torque limit in parameter C132. You have a
choice of either an analog input or fieldbus operation (setting 4:parameter).
• If you selected an analog input, additional parameters appear which you can use to
parameterize the interface (e.g., analog input offset).
• If you selected fieldbus operation, the parameter C232 appears which you will write via
fieldbus or with a constant value.
• Go to page 8.2.2 of the Assistant to parameterize the generating torque limit. Proceed
as described for the motor torque limit.
Figure 8-3 Setting the signal source for the motor torque limit
Additional ways to limit
the torque
As you can see on pages 8.1 und 8.2 (Figure 8-4) the current torque can be limited by
further limitations. The effective torque limit is the minimum of:
• either the absolute or the motor-generating torque limit
• the parameters C03 positive torque limit or C05 negative torque limit
• and the functions for motor and controller protection (e.g., the i
2
t model).
During online mode you can see the valid torque limit in the parameters E62 (current
positive torque limit) and E66 (current negative torque limit). The parameters E180 and
E181 indicate whether the particular limit is exceeded.