GEFRAN-SIEI ARTDrive Vector V2 400Vac Series, Instruction Manual

Page: 339 / 387

ARTDrive V2 series - Instruction Manual Chapter 7 Appendix • 339
Example:
Φ
min = 90 mm transducer output = 1V
Φ
max = 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 sr
c.
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
N
OTE
!
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.