GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 308)

GEI-100332Ga
——— FUNCTION DESCRIPTION ———
6
180
Remember that the drive internally converts the speed in RPM x 4, therefore assuming
to have maximum Enc 1 speed = 1500rpm:
Line speed gain = [32768 x 16384 / (1500 x 4 x 8) – 1] = 11184
Programming example for the analog input 2 on Line speed source:
When an analog input is set on a PAD parameter, its maximum value is + / - 2048,
therefore in order to have Line speed = 100%:
Line speed gain = [32768 x 16384 / (2048 x 8) – 1] = 32767
(In order to obtain a fine tuning it is necessary to carry out the self tuning procedure of
the analog input).
Ref spd source
Ref speed gain
Their functions are similar to Line speed source and Line speed gain. They can set the
signal used for the calculation of the inertia compensations and of the speed reference.
With the exception of particular conditions, for example a difference between the line
speed and the speed reference due to the presence of a loop on the material, such values
are set on the same source with the same gains.
Base omega Value in [rpm] corresponding to the maximum angular speed of the winder/unwinder
(motor shaft side).
Line speed thr Line speed detecting threshold in %.
When “Ref line speed” is lower than “Ref speed thr” the diameter calculation is stopped.
The diameter is kept at a constant value. When “Ref line speed” overcomes the thresh-
old, the diameter calculation is enabled with an initial filter corresponding to Diam init
filter for the time set in Diam stdy delay. At the end of this time the filter will be set
to Diam filter.
Diam filter Filter on the diameter calculation in [ms].
Diam init filter Initial filter on the diameter calculation in [ms].
Diam stdy delay Time in [ms] during which the value of Diam init filter is kept active after Line speed
thr has been overcome.
Diam reset Diameter reset. When this parameter is enabled, the diameter gets a starting value se-
lected with Diam preset sel.
Diam thr Programmable diameter threshold as a percentage of Maximum diameter. The threshold
overcoming is detected by Diam reached and it can be sent to a digital output.
Diam reached Indication for the overcoming of the diameter threshold.
Diam preset sel Selector of the starting diameter [0…3]. Diam preset sel can be set directly via the
keypad or serial line or via two digital inputs programmed as Diam preset sel 0 and
Diam preset sel 1, the selection in this case is carried out with a binary logic.
Diam preset 0 0 starting diameter in [m]. The setting of this value must be included between Minimum
diameter and Maximum diameter.
Diam preset 1 1 starting diameter in [m]. The setting of this value must be included between Minimum
diameter and Maximum diameter.
Diam preset 2 2 starting diameter in [m]. The setting of this value must be included between Minimum
diameter and Maximum diameter.
Diam preset 3 3 starting diameter in [m]. The setting of this value must be included between Minimum
diameter and Maximum diameter.
It can be assigned to an analog input, in this case 10V correspond to Maximum diam-
eter and the voltage referring to the minimum diameter is = 10 x (Minimum diameter
/ Maximum diameter).