Toshiba H7 Operation Manuals page 119

F312
Scan Rate
Program Protection Parameters
⇒
In the event of a momentary power outage, the output signal of the drive will
cease. Upon restoration of power, the drive will output a low-level signal that
will be used to determine the rotation speed of the rotor.
The low-level signal will start scanning the motor at FH and decrease until it
reaches 0.0 Hz or it matches the signal produced by the turning rotor. Once the
rate of rotation is determined, the drive will provide the normal output to
engage the motor from its present speed.
This parameter determines the rate at which the scanning signal goes from FH
to 0.0 Hz. See F301 for additional information on this parameter.
Lock-on Rate
Program ⇒ Protection Parameters
After a momentary power outage, the ASD may have to startup into a spinning
motor. The Lock On Rate is the difference between the time that the RPM of
the motor is determined by the ASD and the time that the ASD outputs a drive
signal to the motor.
See F301 for additional information on this parameter.
Search Method
Program ⇒ Protection Parameters
In the event of a momentary power outage, this parameter may be used to set
the starting point (frequency) of the scanning signal that is used to determine
the rotor speed or this parameter may be used to select the method used to
search for the speed of the rotor. See
on this parameter.
Settings:
Normal
Start from 0.0 Hz
Start from Running Frequency
Option Board (ASD-SS)
PG
Search Inertia
Program ⇒ Protection Parameters
After a momentary power loss or the momentary loss of the ST-to-CC
connection, this parameter sets the time for the commanded torque to reach its
programmed setting during the automatic restart. This function is in effect so
long as the Retry/Restart feature is enabled at F301.
Settings:
0.5 Sec.(fast)
1.0 Sec. (standard)
1.5 Sec.
2.0 Sec.
2.5 Sec.
3.0 Sec.
3.5 Sec.
4.0 Sec.
4.5 Sec.
5.0 Sec. (slow)
112
Retry/Restart
⇒
⇒ Retry/Restart
⇒ Retry/Restart
F301 and F312 for additional information
⇒ Retry/Restart
Direct Access Number — F312
Parameter Type — Numerical
Factory Default — (drive dependent)
Changeable During Run — No
Minimum — 0.50
Maximum — 2.50
Direct Access Number — F313
Parameter Type — Numerical
Factory Default — (drive dependent)
Changeable During Run — No
Minimum — 0.50
Maximum — 2.50
Direct Access Number — F314
Parameter Type — Selection List
Factory Default — Normal
Changeable During Run — No
Direct Access Number — F315
Parameter Type — Selection List
Factory Default — 1.0
Changeable During Run — No
Units — Seconds
H7 ASD Operation Manual
F315