Toshiba Q9 Installation And Operation Manual page 110

F254
Shaft Stationary
Program  Special Controls
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.
Shaft Stationary control starts after the DC injection brake stops the motor and
continues until ST – CC is opened, power is turned off, an Emergency Off
command is received, or this parameter is changed.
Enabling this feature will also require a non-zero entry at F250.
Settings:
0 — Disabled
1 — Enabled
0 Hz Command Output
No Path — Direct Access Only
This parameter is used to set the go-to-zero method to be used by the ASD in the
event that the ASD is commanded to go to zero Hz.
Settings:
0 — Standard (DC Injection Braking)
1 — 0 Hz Command
Low Output Disable Time
Program  PID Setup
This parameter sets the time that the ASD is allowed to operate below the Lower-
Limit setting before an alarm and subsequent fault is incurred.
100
Direct Access Number — F254
Parameter Type — Selection List
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
Direct Access Number — F256
Parameter Type — Numerical
Factory Default — 0.0
Changeable During Run — Yes
Minimum — 0.0
Maximum — 600.0
Units — Seconds
Q9 ASD Installation and Operation Manual
F256