Santerno DCREG2 Series User Manual page 109

DCREG2
15P0059B3
DCREG4
USER MANUAL
2. Constant-reference quick load change. This may happen in a machine-tool rotating at a constant
speed when it starts a piece processing.
In that case, to avoid any speed decrease at the beginning of the transient, the proportional gain is to be
temporarily increased and the integral time is to be shorter, as shown in the figure below.
Finally, if a motor has a different mechanical time constant, a different reduction ratio, a different load
inertial moment, and so on, the speed loop regulation parameters it requires are different than the
standard ones.
In that case, the configured digital input is to be closed by setting one of par. C130 ... C135 at 8:Second
ParmSet. The new values of the proportional gain and the speed loop integral time will be the ones
programmed in par. P076 (KpSpeed2) and P077 (TiSpeed2) respectively instead of the original values set
in par. P070 (KpSpeed) and P071 (TiSpeed).
During the transient, the adaptive parameter function - if enabled - will bring the proportional gain and
integral time values to the new values set in par. P079 (KpSpdAdapt2) and P080 (TiSpdAdapt2)
respectively.
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