{}

Our Brands

Schneider Electric Gulf Countries and Pakistan Website

Welcome to our website.
How can we help you today?
What is the meaning of NLP and STO state of Altivar variable speed drive? What is the status of the Relay output assigned to "no drive fault", will it signalize the fault?
The NLP state represents "no-line power". If you supply 24V for the control circuit while power supply is missing. The drive can be configured, exchange data via HMI, over communication, etc. It is not a fault state though the drive will not accept the Run command.

The STO state (safe torque off state) represents the normal state (not a fault) with the safety function "safe torque off" activated. STO can normally occur during operation when the operator activates STO input for example.

To sum up, none of NLP or STO triggers the fault state, so the relay assigned to "no drive fault" will still signalize "no fault".

Schneider Electric United Arab Emirates

What is the meaning of NLP and STO state of Altivar variable speed drive? What is the status of the Relay output assigned to "no drive fault", will it signalize the fault?
The NLP state represents "no-line power". If you supply 24V for the control circuit while power supply is missing. The drive can be configured, exchange data via HMI, over communication, etc. It is not a fault state though the drive will not accept the Run command.

The STO state (safe torque off state) represents the normal state (not a fault) with the safety function "safe torque off" activated. STO can normally occur during operation when the operator activates STO input for example.

To sum up, none of NLP or STO triggers the fault state, so the relay assigned to "no drive fault" will still signalize "no fault". 

Schneider Electric United Arab Emirates

Explore more
Range:
Explore more
Range:
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range:
Explore more
Range:
move-arrow-top
Your browser is out of date and has known security issues.

It also may not display all features of this website or other websites.

Please upgrade your browser to access all of the features of this website.

Latest version for Google Chrome, Mozilla Firefox or Microsoft Edgeis recommended for optimal functionality.
Your browser is out of date and has known security issues.

It also may not display all features of this website or other websites.

Please upgrade your browser to access all of the features of this website.

Latest version for Google Chrome, Mozilla Firefox or Microsoft Edgeis recommended for optimal functionality.