H7 ASD Operation Manual 103
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.
Direct Access Number — F254
Parameter Type — Check Box
Factory Default — Disabled
Changeable During Run — Ye s
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
F254 F255
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