ARTDrive V2 series - Instruction Manual Chapter 7 Appendix • 339
Example:
Φmin = 90 mm transducer output = 1V
Φmax = 900 mm transducer output = 10V
Φ = 450 mm transducer output = 5V
The analog input, which the sensor is connected to, has to be set as a
source of PID Mlt PI 3 src.
The multiplier selector must point to 3, that is:
Mlt PI sel 0 = One
Mlt PI sel 1 = One
The selection of the PID Mlt PI sel 3 multiplier is therefore active.
When PID PI enab = disable, the value of PID Mlt PI 3 is written in PID PI
out mon and used as a multiplicative factor of the feed-forward.
As already stated, the setting of PI output PID depends on the diameter
ratio, therefore the proportional voltage signal towards the diameter is
automatically calculated again via the formula:
PID Mlt PI 3 = (Φ
0
/ Φ
1
)
where: Φ
0
= winder minimum diameter
Φ
1
= winder present diameter
NOTE! During the commissioning, it is necessary to check that the signal
coming from the sensor is proportional to the diameter and that 10V
corresponds to its maximum value (the analog input self-tuning has to
be performed anyway).
Check also that PI clam top and PI clamp bot have been programmed
according to the diameter ratio as stated in the previous examples.
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