Yaskawa iQpump Drive User Manual - Manual (Page 96)

5.1 iQpump Basic Programming Parameters
96 YASKAWA TM.iQp.01 iQpump Drive User Manual
Figure 5.11 DC Injection Braking to Stop
Important: If an overcurrent (OC) fault occurs during DCInj to Stop, lengthen the Minimum Baseblock Time (L2-03) until the fault no
longer occurs.
3: Coast w/Timer: When the Run command is removed, the iQpump drive will turn off its output and the motor will coast to a stop. If a
Run command is input before time T (operation wait time) expires, the iQpump drive will not run and the Run command will need to be
cycled before operation can occur. The time T (operation wait time) is determined by the output frequency when the Run command is
removed and the active deceleration time (C1-02).
Figure 5.9
Figure 5.12 Coast to Stop with Timer
◆ b2 DC Braking
The DC Braking Group contains parameters associated with the DC injection braking feature. Parameters involving the starting
frequency, current level, braking time, and motor pre heat current level are located here.
■
b2-01 DC Injection Braking Start Frequency
Setting Range: 0.0 to 10.0 Hz
Factory Default: 0.5 Hz
Parameter b2-01 sets the output frequency where the iQpump drive begins DC Injection during Ramp to stop in order to lock the rotor of
the motor and established the end point of the ramp. If b2-01 < E1-09 (Minimum Frequency), then DC Injection begins at E1-09.
Parameter b2-01 also determines the output frequency that the iQpump drive must be at or below before a Zero Speed condition is
considered true. This affects any digital output configured as a Zero Speed signal (H2-0x = “1: Zero Speed”).
ON
OFF
Run Command
Output Frequency Drive Output Voltage Interrupted
DC Injection Brake
DC Injection Brake Time Minimum Baseblock
Time (L2-03)
100 %
0 %
D
C
Injec
tion Br
ak
e T
ime
b2-04 x 10
b2-04
10%
100% (Maximum
Output Frequency) b2-04
(CLOSED)
(OPEN)
Run Command
Output Frequency
Drive Output
Voltage
Interrupted
OFF
ON
Timer Value T
(C1-02)
100 %
0 %
Operat
io
n W
ai
t T
im
e (T
)
Deceleration
Time (C1-02)
Minimum
Baseblock
Time (L2-03)
Minimum
Output
Frequency
100% (Maximum
Output
Frequency)
Output Frequency at Stop Command Input
Ignored
Run Command
Timer Value T
(OPEN)
(CLOSED)