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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.