Danfoss iC7 Series Application Manual page 295

Application Guide | iC7 Series Industry
Default Value: –
Parameter 9921
Number:
Data Type:
UINT
Safe Torque Off (STO)
6.8.4
The Safe Torque Off (STO) function is a component in a safety control system. STO prevents the unit from generating the power required
to rotate the motor. The iC7 drives are available with:
Safe Torque Off (STO), as defined by EN IEC 61800-5-2.
l
Stop category O, as defined in EN 60204-1.
l
STO Activation
The STO function is activated by removing the voltages at the STO inputs of the drive. By connecting the frequency converter to external
safety devices providing a safe delay, an installation for a Safe Stop 1 can be obtained. External safety devices must fulfill the required
Cat.IPL or SIL when connected to STO inputs.
With default settings, the drive issues a fault, trips the unit, and coasts the motor to a stop when the STO function is activated. A manual
restart is required to continue operation. Use the STO function to stop the drive when a safety function is required. In normal operating
mode when STO is not required, use the standard stop function instead.
STO (Menu Index 7.3)
6.8.5
P 7.3.1 Safe Torque Off Response
Select the response of the drive to the activation of Safe Torque Off.
Default Value: 14 (Fault)
Parameter 9910
Number:
Data Type: UINT
The following are the selections for the parameter.
Selection Number Selection Name
15 Warning
14 Fault
P 7.3.2 Safe Torque Off Output
Select an output for signaling the activation of Safe Torque Off.
Default Value: –
Parameter 9911
Number:
Data Type: UINT
© 2024.05
Parameter Type:
Unit:
Access Type:
Parameter Type:
Unit:
Access Type:
Selection Description
The drive issues a warning.
The drive issues a fault and coasts the motor.
Parameter Type:
Unit:
Access Type:
AB480436531518en-000601 / 136R0283 |
Parameter Descriptions
Selection
–
Read/Write
Selection
–
Read/Write
Selection
–
Read/Write
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