Toshiba G7 Operation Manual page 112

F252
DC Injection Braking Time
Program ⇒ Protection Parameters ⇒ DC Braking
This parameter is used to set the on-time duration of the DC Injection
Braking.
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)
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
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)
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
106
into a stopped motor. This feature is useful in
Direct Access Number — F252
Parameter Type — Numerical
Factory Default — 1.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 10.00
Units — Seconds
Direct Access Number — F253
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — Yes
Direct Access Number — F254
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — Yes
Direct Access Number — F255
Parameter Type — Selection List
Factory Default — Standard (DC
Injection Braking)
Changeable During Run — No
G7 ASD Operation Manual
F255