F252

F255

 

 

DC Injection Braking Time

Direct Access Number — F252

Program Protection Parameters DC Braking

Parameter Type — Numerical

This parameter is used to set the on-time duration of the DC Injection

Factory Default — 1.00

Changeable During Run — Yes

Braking.

 

 

Minimum — 0.00

 

Maximum — 10.00

 

Units — Seconds

Motor Shaft Fixing Control

Program Protection Parameters DC Braking

This parameter determines if DC Injection braking is to be used during a change in the direction of the motor.

Settings:

Box checked (Enabled)

Box not checked (Disabled)

Direct Access Number — F253

Parameter Type — Check Box

Factory Default — Disabled

Changeable During Run — Yes

Motor Shaft Stationary Control

Program Protection Parameters DC Braking

This parameter Enables/Disables a continuous DC injection at half of the amperage setting of F251 into a stopped motor. This feature is useful in preheating the motor or to keep the rotor from spinning freely.

Motor Shaft Stationary Control starts after the DC injection brake stops the motor and continues until ST CC is opened, power is turned off, receiving an Emergency Off command, or this parameter is changed.

Enabling this feature will also require a non-zero entry at F250.

Settings:

Box checked (Enabled)

Box not checked (Disabled)

Direct Access Number — F254

Parameter Type — Check Box

Factory Default — Disabled

Changeable During Run — Yes

0 Hz Command Function

Program Special Control Parameters Special Parameters Dead

Band of 0 Hz Frequency

This parameter selects the go-to-zero method to be used by the ASD when the ASD is commanded to go to zero Hz.

Settings:

Standard (DC Injection Braking)

0 Hz Command

Direct Access Number — F255

Parameter Type — Selection List

Factory Default — Standard (DC

Injection Braking)

Changeable During Run — No

106

G7 ASD Operation Manual

Page 112
Image 112
Toshiba G7 DC Injection Braking Time, Motor Shaft Fixing Control, Motor Shaft Stationary Control, Hz Command Function