Toshiba W7 - Manual (Page 99)

W7 ASD Installation and Operation Manual 93
Overcurrent Stall Level
Program ⇒ Protection Settings ⇒ Overcurrent Stall Level
This parameter specifies the output current level at which the output frequency
is reduced in an attempt to prevent a trip. The overcurrent level is entered as a
percentage of the maximum rating of the ASD.
Note: Soft Stall must be enabled to use this feature.
Parameter Type — Numerical
Factory Default — (ASD-dependent)
Changeable During Run — Yes
Minimum — 0.00
Maximum — 200.0
Units — %
Overload Reduction Starting Frequency
Program
⇒
Protection Settings
⇒
Overload Reduction Starting
Frequency
This parameter is used to reduce the start frequency during very low-speed
motor operation. During very low-speed operation the cooling efficiency of the
motor decreases. Lowering the start frequency aides in minimizing the
generated heat.
Parameter Type — Numerical
Factory Default — 6.00
Changeable During Run — Yes
Minimum — 0.00
Maximum — 30.00
Units — Hz
Overspeed Detection Frequency Range
Program ⇒ Protection Settings ⇒ Overspeed Detection Frequency
Range
This parameter sets the upper level of the Base Frequency range that, once
exceeded, will cause an Overspeed Detected alert.
Parameter Type — Numerical
Factory Default — 0.0
Changeable During Run — Yes
Minimum — 0.0
Maximum — 30.0
Units — Hz
Overtorque Detection Time
Program ⇒ Protection Settings ⇒ Overtorque Detection Time
This parameter sets the amount of time that the overtorque condition may
exceed the tripping threshold level set at Overtorque Trip/Alarm Level
(Positive Torque) and Overtorque Trip/Alarm Level (Negative Torque)
before a trip occurs.
Parameter Type — Numerical
Factory Default — 0.50
Changeable During Run — No
Minimum — 0.00
Maximum — 100.0
Units — Seconds
Overtorque Trip
Program ⇒ Protection Settings ⇒ Overtorque Trip
This parameter Enables/Disables the Over Torque Tripping function.
When enabled, the ASD trips if an output torque larger than the setting of
parameters Overtorque Trip/Alarm Level (Positive Torque) or Overtorque
Trip/Alarm Level (Positive Torque) is detected for a time longer than the
setting of the Overtorque Detection Time parameter.
When disabled, the ASD does not trip due to overtorque conditions.
Parameter Type — Selection List
Factory Default — Disabled
Changeable During Run — No
Overcurrent Stall Level Overtorque Trip