D-77
Parameter Reference
AC30V series Variable Speed Drive
PNO Parameter Descriptions
PMAC SVC Start Time
This parameter is used in conjunction with the
PMAC SVC Open Loop Strt
parameter. It selects the duration of Step 1 in the startup
procedure used for starting motors:
The value should be set up relatively to the motor i load inertia.
PMAC SVC Start Cur
This parameter is used in conjunction with the
PMAC SVC Open Loop Strt
parameter. It selects the current level during the startup
procedure used for starting motors.
The percentage value is a percentage of the nominal motor current (
PMAC Rated Current
of the
PMAC Motor Data
functions)
.
The default value of 10% is considered appropriate for most applications with light load, very low friction and low acceleration.
The value should be adapted to the starting conditions.
PMAC SVC Start Speed
This parameter is used in conjunction with the
PMAC SVC Open Loop Strt
parameter. It selects the speed setpoint at which the
speed control is switched from an open loop mode to a closed loop mode during the startup procedure used for starting motors.
The percentage value is a percentage of the maximum application speed (
100% Speed in RPM
of the
Scale Setpoint
functions). It
should be set to an equivalent of 5% of the
PMAC Max Speed
of
PMAC Motor Data
function.
In open loop mode, the system is not controlled in speed mode. It must only be used to ‘start’ the motor under heavy conditions, or to
transitorily reach the zero speed or crossing the zero speed setpoint. It is not intended to be used to control accurately a motion.
