MA7200 PLUS Operating Manual
TECO – Westinghouse Motor Company Sn-06 Parameter Details
Cont.
The following diagrams show the operation of each stopping method.
a) Sn-06= 0 Deceleration to Stop
Deceleration to a stop at a rate set by the selected deceleration time.
b) Sn-06=1 Coast to Stop
After the stop command is executed, the run source is disregarded until the minimum baseblock time
Cn-37 has elapsed.
Fig. 9.2.3.1 Sn-06 = 0 Deceleration to Stop Fig. 9.2.3.2 Sn-06=1 Coast to Stop
c) Sn-06=2 Whole Range DC Injection Braking to Stop
Fig. 9.2.3.3 Whole Range DC Injection Braking to Stop
After the stop command is input and the minimum baseblock time (Cn-37) has elapsed, DC injection braking
is applied and the motor stops.
The DC injection braking time depends on the output frequency when the stop command is input and the
setting of parameter Cn-16 (DC injection time at stop) is as shown in Fig.9.2.21.
When the power applied to an induction motor is turned off, the counter-electromotive force generated by the
residual magnetic field in the motor can cause an overcurrent to be detected when DC injection braking stop is
applied. In this case, lengthen the minimum baseblock time (Cn-37) to prevent an overcurrent (OC) during
stopping.
Cont.