
SGP 160-2,5/4/8P/16P 9
10. Parameter adjustments
10.1 Ramp-up and ramp-down times
With the trimmer tint (P2) the ramp-up and the ramp-down can be adjusted between 0 ... approx.
5sec. When the controller inhibit is actuated, the ramp-up integrator is reset.
10.2 Maximum speed
With the trimmer nmax (P3) max. armature voltage can be limited between 90 ... 180V.
10.3 Minimum speed
With the trimmer n
min (P4) the minimum speed can be limited to 0 ... 50% of the adjusted
maximum speed.
10.4 I x R compensation with armature voltage control
The compensation voltage is adjusted with the trimmer I x R (P1). The compensation increases if
the trimmer is turned clockwise. The adjustment is to be made when the motor has its normal
operating temperature. The drive is to be adjusted to approx. 50% of the nominal speed,
unloaded as far as possible, and the speed is to be measured.
Then load the drive and compensate the resulting speed drop with the trimmer P1. Afterwards
check the effects of the compensation at minimum and maximum speed and re-adjust if
necessary. Make sure that an over-compensation, i.e., a speed rise under load, is avoided at any
rate, as otherwise the drive becomes unstable. In the case of tachometer control the potentio-
meter P1 is set to left stop.
10.5 Current limitation Imax
As a rule, the current limitation is to be adjusted with the potentiometer Imax (P5) so that the
maximum current required for the start-up and acceleration is provided. In the case of gearmotors
make sure that the limit torque of the gearing is not exceeded by adjusting the limit current too
high.
10.6 Adapting the resistor R21 for tachometer control
When the controller is operated with a d.c. tachometer, it may be necessary to adapt the resistor
R21 accordingly (depending on the amount of the tachometer voltage at nominal speed).
Basically, only resistors with a loading capacity of 1 watt are to be used. The trimmer I x R is set to
left stop. The resistance value can be determined with the following formula.
UTacho = voltage value of the d.c. tachometer in volts per 1000 revolutions
nMotor = nominal speed of the motor at UArmature max.
The calculated resistance is to be inserted in k Ohm.
)(2110
1500
kR
MotorTacho
nU