Toshiba G7 Torque Limit Mode (Speed Dependent), F451 F470, Continued Stall Until Trip During Power Operation, Stall Prevention During Regeneration, Current Differential Gain, VI/II Bias Adjust

G7 ASD Operation Manual 135
Torque Limit Mode (Speed Dependent)
Program ⇒ Torque Setting Parameters ⇒ Torque Limit Settings ⇒
Torque Limit Mode (Speed Dependent)
This parameter allows for either wide or very lim ited speed fluctuations while
operating in the Torque Control mode.
The ASD output follows the commanded speed when No Speed Cooperation
is selected and has a very limited speed fluctuation range when Standard is
selected.
Settings:
Standard
No Speed Cooperation
Direct Access Number — F451
Parameter Type — Selection List
Factory Default — Standard
Changeable During Run — Yes
Continued Stall Until Trip During Power Operation
Program ⇒ Protection Parameters ⇒ Stall ⇒ Continuing Stall Period
This parameter allows the user to extend the Overvoltage Stall (F305) and the
Overcurrent Stall (F017) time settings.
Direct Access Number — F452
Parameter Type — Numerica l
Factory Default — 0.0
Changeable During Run — Yes
Minimum — 0.0
Maximum — 1.00
Units — Seconds
Stall Prevention During Regeneration
Program ⇒ Protection Parameters ⇒ Stall ⇒ Stall Prevention During
Regeneration
This parameter Enables/Disables the Overvoltage Stall (F305) and the
Overcurrent Stall (F017) function during regeneration only. Application-
specific conditions m ay occur that warrant d isabling the Stal l function during
regeneration.
Settings:
With Stall Prevention
Without Stall Prevention
Direct Access Number — F453
Parameter Type — Selection List
Factory Default — With Stall
Prevention.
Changeable During Run — Yes
Current Differential Gain
Program ⇒ Special Control Parameters ⇒ Special Para meter s ⇒
Current Differential Gain
This parameter determines the degree that the current differential function
affects the output signal. The larger the value entered here, the more
pronounced the Current Differential Gain.
Direct Access Number — F454
Parameter Type — Numeri cal
Factory Default — 1.23
Changeable During Run — Yes
Minimum — 0.00
Maximum — 327.6
VI/II Bias Adjust
Program ⇒ Frequency Setting Parameters ⇒ Speed Reference
Setpoints ⇒ VI/II ⇒ Bias
This parameter is used to fine-tune the bias of the VI/II input terminals.
Note: See note on pg. 46 for further information on the VI/II termi nal.
This setting may be used to ensure that the zero level of the input source (pot,
pressure transducer, flow met er, etc.) is also the zero level setting of the ASD
system.
This is accomplished by setting the input so urce to zero and eithe r increasing or
decreasing this setting to provide an output of zero from the ASD.
Direct Access Number — F470
Parameter Type — Numeri cal
Factory Default — 100
Changeable During Run — Yes
Minimum — 0.0
Maximum — 255
F451 F470