27
Operation
Decelerating to minimum speed
The circuit shown in Figure 11 (page 28) may be used to decelerate a motor to a mini-
mum speed. Closing the switch between S1 and S2 decelerates the motor from set
speed to a minimum speed determined by the MIN SPD trimpot setting. If the MIN SPD
trimpot is set full CCW, the motor decelerates to zero speed when the switch between
S1 and S2 is closed. The DECEL trimpot setting determines the rate at which the drive
decelerates. By opening the switch the motor accelerates to set speed at a rate deter-
mined by the ACCEL trimpot setting.
Line starting and line stopping
Line starting and line stopping (applying and removing AC line voltage) is recom-
mended for infrequent starting and stopping of a drive only. When AC line voltage is
applied to the drive and a START is commanded, the motor accelerates to the speed
set by the speed adjust potentiometer or analog input signal. When AC line voltage is
removed, the motor coasts to a stop.
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