Yaskawa G5 High Slip Braking - Manual (Page 3)

Date: 07/01/04, Rev: 04-07 Page 3 of 3 TM.G5SW.009
to be increased. Parameter C9-02 (HSB Current Limit) sets the maximum current to be drawn during an
HSB stop. Higher C9-02 settings will shorten motor stopping times but cause increased motor current,
and therefore increased motor heating.
Parameter C9-03 (HSB Stop Dwell Time) sets the amount of time the inverter will dwell at E1-09
(Minimum Frequency). If this time is set too low, the machine inertia can cause the motor to rotate slightly
after the HSB stop is complete and the inverter output is shut off.
Parameter C9-04 (HSB Overload Time) sets the time required for an OL7 (HSB Overload Fault) to occur
when the inverter output frequency does not change for some reason during an HSB stop. Normally this
does not need to be adjusted.
Parameter B2-04 (DC Injection Braking Time at Stop) should be set to a mimimum of 0.50 sec when
using HSB. This will activate DC injection during the final portion of HSB and help ensure that motor
stops completely.
An HSB stop is cancelled if either of the following occur:
• External Base Block command is given via multi-function input (H1-0X = 8,9).
• External Fast Stop command is given via multi-function input (H1-0X = 15,17).
Motor
Speed
Output
Current
DC Bus
Voltage
C9-02
HSB Current LImit
C9-03
HSB Stop Dwell Time
E1-09
Minimum Frequency
L2-03
Minimum Baseblock Time
Approx. 90% of
overvoltage trip level
C9-14
HSB Off Frequency
C9-13
HSB On Frequency
Run
Command
(inverter will not restart until HSB stop
complete and run command re-cycled)