Toshiba G7 manual Run Frequency Hysteresis, End Frequency, Hz Dead Band Signal

F242		F251
	Run Frequency Hysteresis	Direct Access Number — F242
	Program ⇒ Special Control Parameters ⇒ Frequency Control	Parameter Type — Numerical
	This parameter provides a plus-or-minus value for the Run Frequency setting	Factory Default — 0.0
		Changeable During Run — Yes
	(F241).
		Minimum — 0.0
		Maximum — 30.0
		Units — Hz

End Frequency

Program ⇒ Special Control Parameters ⇒ Frequency Control

This parameter sets the lowest frequency that the drive will recognize during deceleration before the drive goes to 0.0 Hz.

Direct Access Number — F243

Parameter Type — Numerical

Factory Default — 0.0

Changeable During Run — Yes

Minimum — 0.0

Maximum — 30.0

Units — Hz

0 Hz Dead Band Signal	Direct Access Number —	F244
Program ⇒ Special Control Parameters ⇒ Special Parameters ⇒ Dead	Parameter Type — Numerical
Band of 0 Hz Frequency	Factory Default — 0.0
This parameter sets an output frequency threshold that, until the commanded	Changeable During Run — Yes
frequency surpasses this setting, the ASD will output 0 Hz to the motor.	Minimum — 0.0
Note: This setting will override the Startup Frequency setting (F240)	Maximum — 5.0
	Units — Hz
if this setting has a higher value.
DC Injection Braking Start Frequency	Direct Access Number —	F250
Program ⇒ Protection Parameters ⇒ DC Braking	Parameter Type — Numerical
During deceleration this is the frequency at which DC Injection braking will	Factory Default — 0.0
start.	Changeable During Run — Yes
DC Injection Braking	Minimum — 0.0
DC Injection Braking is a braking system used with three-phase motors.	Maximum — 120.0
	Units — Hz
Unlike conventional brakes, there is no physical contact between the rotating
shaft and a stationary brake pad or drum. When braking is required, the drive
outputs a DC current that is applied to the windings of the motor to quickly
brake the motor. The braking current stops when the time entered in F252
times out.
The intensity of the DC current used while braking determines how fast the
motor will come to a stop and may be set at F251. The intensity setting is
entered as a percentage of the full load current of the ASD.
DC Injection Braking is also used to preheat the motor or to keep the rotor
from spinning freely when the motor is off by providing a pulsating DC current
into the motor at the Carrier Frequency. This feature may be enabled at F254.
DC Injection Braking Current	Direct Access Number —	F251
Program ⇒ Protection Parameters ⇒ DC Braking	Parameter Type — Numerical
	Factory Default — 50.00

This parameter sets the percentage of the rated current of the drive that will be

used for DC Injection braking. A larger load will require a higher setting.

Changeable During Run — Yes

Minimum — 0.00

Maximum — 100.0

Units — %

G7 ASD Operation Manual 105