BENSHAW RSi GM2 Series - 5.1 Operating with Auxiliary References

84
GM2 Series VFD
890054-00-00
Learning Basic Features
Free Run Stop
When the run command is removed, the inverter output turns off and the motor/load coasts to a
stop.
Group
Code
Name
Setting
Setting Range
Unit
Ad
08
Stop Mode
2
Free-Run
0–4
-
Note: With high inertia loads, the load’s inertia will cause the motor to continue rotating.
The inverter does not control the motor during Free-Run.
Power Braking
Power Braking is applied during deceleration when the inverter’s DC voltage rises above a specified
level due to motor regenerated energy. The inverter determines the optimum deceleration rate and
will adjust the deceleration time or will reaccelerating the motor. Power braking can be used when
short deceleration times are needed without brake resistors or when optimum deceleration is
needed without causing an over voltage fault.
Group
Code
Name
Setting
Setting
Range
Unit
Ad
08
Stop Mode
4
Power Braking
0–4
-
• To prevent overheating or damaging the motor, do not apply power braking to the
loads that require frequent deceleration.
• Stall prevention and power braking only operate during deceleration.
• Power braking takes priority over stall prevention. In other words, when both bit3 and
bit4 of Pr.50 (stall prevention and flux braking) are set, power braking will take
precedence and operate.
• Note if deceleration time is too short or inertia of the load is too great, an overvoltage
fault stll may occur.
• Note when power braking is used, the actual deceleration time can be longer than the
pre-set deceleration time.