Start here for access to our Knowledge Base to get answers to over one hundred thousand questions online in seconds.Find Answers
...See what we've been doing in some of our major markets.Find your Location
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Everything you need to know about our IoT technology backbone.Learn more
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
What can cause the ATV12 to show OLC?
Customer is doing 6 cycles per minute (start/stop) and noticed that after 3 cycles the drive will show "OLC"
OLC is process overload.
Check the process and the parameters of the drive to be in phase.
Go to I_O- menu:
Parameter tOL is the Application Overload time delay, adjustable range 0-100sec.
Parameter LOC is the Application Overload threshold, adjustable range 70-150% of Motor rated current nCr.
This function can be used to stop the motor in the event of an application overload. This is not a motor or drive thermal overload. If the motor current exceeds the Application Overload threshold LOC, an Application Overload time delay tOL is activated. Once this time delay tOL has elapsed, if the current is still greater than the overload threshold LOC -10%, the drive will stop running and display OLC Process overload.
Overload detection is only active when the system is in steady state (speed reference reached).
tOL = 0 will disable application overload detection.
Sign up for all the latest solutions, offers and best practices straight to your inbox.