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
ATV21/212 drive is stuck running at low speed and will not follow the analog input signal.
Altivar ATV21 ATV212
Drive is not following the remote analog signal coming in on VIA nor VIB
Check F112 it is factory set at 6 which is preset speed. The factory set preset speed is 15hz. So if your LL (low speed) is 20hz the drive will run at low speed.
Change F112 to 0 to turn off or find what they want to program their logic input F112 to.
Also check FNOD make sure its set to 1 for VIA analog inputs and 2 for VIB analog inputs.
If needed check the polarity voltage or current coming into these inputs make sure the positive signal is going into the analog input.