Ramps Over The Reference - Santerno DCREG2 Series User Manual

DCREG2
DCREG4
6.2

RAMPS OVER THE REFERENCE

In parameters ranging from P030 to P039, the operator may program the ramp application to the set
reference in order to produce a reference with no value instant variation (discontinuity).
With respect to the references applied when the START input is on, the programmable rise and/or fall
ramps are separate concerning the positive polarity and the negative polarity of the set reference (P030 ...
P033). Some initial/final rounding is also possible either at the beginning of the transient (P038) or at the
end of the transient (P039). In addition, when the START digital input is disabled, two additional fall ramps
may be programmed (stop ramps: P034 and P035), also separate concerning the reference positive
polarity and negative polarity; the initial/final rounding programmed are not applied to the stop ramps.
The figure below shows a possible example of the reference that can be produced by the ramp circuit.
NOTE
NOTE
NOTE
The following inequality is to be verified between the ramp times programmed
in parameter P030 ... P033 and the initial/final rounding times programmed in
parameters P038, P039:
As the figure shows, for each ramp transient (rise ramp or fall ramp transient),
the duration of the ramp really set is equal to the addition of the time
programmed in the relevant parameter, of half the initial rounding time and
half the final rounding time.
In order to exactly respect the time set for the stop ramps in par. P034 and
P035, the following equality relations are to be correct:
P 034

P 031 ; P
10
P 038 P 039
 
P 030
2 2
P 035

033 .
10
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