Deceleration To Stop Diagram; Coast To Stop Diagram; Whole Range Dc Injecting Braking Stop Diagram - TECO speecon 7200ma Instruction Manual

•The following diagrams show the operation of each stopping method.
a) Deceleration to Stop (Sn-06= 0)
Deceleration to a stop at a rate set with the selected deceleration time.
b) Coast to Stop (Sn-06= 1)
After the stop command is executed, run source is disregarded until the Min.
baseblock time Cn-37 has elapsed.
Run
command
Output
frequency
DC injection
beginning frequency
(Cn-14)
Fig. 30 Deceleration to stop
c) Whole Range DC Injection Braking Stop (Sn-06= 2)
ON
Run
Comm.
O/P Freq.
Min. baseblock time
•After the stop command is input and the minimum baseblock time (Cn-37)
has elapsed, DC injection braking is applied and the motor stopped.
•The DC injection braking time depends upon the output frequency when the
stop command is input and the "DC injection time at stop" setting (Cn-16) as
shown in Fig. 32.
•Lengthen the minimum baseblock time (Cn-37) when an overcurrent (OC)
occurs during stopping. When the power 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.
ON
OFF
Dec time
DC injection
braking time
OFF
DEC time
(Cn-37)
Fig. 32 Whole range DC Injecting Braking Stop
Run
command
Output
frequency
The inverter output is shut off when the stop
DC injection
braking time
DC injection
O/P freq. when the stop command is input
braking time
73
ON
command is input
Fig. 31 Coast to Stop
Cn-16 * 10
DC injection braking
time at Run Source off
10 %
100 %
OFF
(Cn-16)