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Q How to set a negative slope in AVI-input?
A This is not possible.
The parameters Pr04.00 ~ Pr04.03 can only be used to set Bias and Gain of the front
potentiometer on the keypad. In the examples, however, it is inadvertently suggested
that it also is possible for the AVI-input.
And with Pr04.11 ~ Pr04-14 it is also not possible, because Pr04.12 must be lower
than Pr04.14. (the same applies to the settings of ACI and AVI2).
Q How to set PID?
A To set-up PID do the following:
Pr10-00 to select the PID set point (not via Pr02-00 as e.g. in VFD-B)
Pr10-01 to select the feedback input and positive or negative feedback
[ negative means error=setpoint – feedback ]
[ positive means error=feedback – setpoint ]
Q What is the difference between “AErr” and “FbE” error messages?
A Both messages are generated when the signal on the ACI input is lost. Normally, when
using 4-20mA, if the signal is <4mA.
In normal operation (no PID) with the frequency command via ACI (Pr02-00=2) the
blinking warning “AErr” (Analogue Error) can be displayed when the signal is lost.
In Pr02-06 the required action can be set. The detection cannot be set and is
immediate.
Pr02-06=0. When feedback on ACI is lost, the drive ramps to stop. After
reconnecting ACI the drive goes back to the set frequency.
Pr02-06=1. When feedback on ACI is lost, display shows blinking "AErr" and
coasts to stop. After reconnecting ACI it becomes steady. Press reset, give new
RUN command, and it runs again to the set frequency.
Pr02-06=2. When feedback on ACI is lost, the drive goes to last frequency
command value without any warning on display. After reconnecting ACI the drive
goes back to the set frequency.
When using PID with the feedback signal on ACI, the VFD-E can show the warning
“FbE” (Feedback Error) when the feedback signal is lost. The detection time is set in
Pr10.08. The default value is 60s, so in that case it will take 60s before the warning is
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