Toshiba TOSVERT VF-MB1 Instruction Manual page 191

Torque limits can be set with the parameters f441 and f443.
[Setting of power running torque]
f441 (Power running torque limit 1)
[Setting of regenerative torque]
f443 ( Regenerative braking torque limit 1)
[Parameter setting]
Title
f441 Power running torque limit 1 level
f443 Regenerative braking torque limit 1 level
Constant output zone torque limit
f454
selection
Using parameters, two different torque limits can be set for each operating status: power running and
regenerative braking. Refer to Section 7.2.1 for the setting for switching from the terminal board.
Power running torque limit 1 : 
Power running torque limit 2 : 
Note: If the value set with f601 (stall prevention level) is smaller than the torque limit, then the value set with
f601 acts as the torque limit.
6.22.2 Torque limit mode selection at acceleration/deceleration
f451 : Acceleration/deceleration operation after torque limit
 Function
Using this function in combination with the mechanical brake of the lifting gear (such as a crane or hoist)
makes it possible to minimize the delay before the brake starts working, and thus prevents the load from
falling because of a decrease in torque.
Moreover, it improves the motor's response during inching operation and keeps the load from sliding down.
[Parameter setting]
Title
Acceleration/deceleration operation after
f451
torque limit
(1) f451 = 0 (In sync with acceleration/deceleration)
The increase in operation frequency is inhibited by the activation of the torque limit function. In this control mode,
therefore, the actual speed is always kept in sync with the operation frequency. The operation frequency restarts
to increase when torque decreases as a result of the release of the mechanical brake, so the time required for
the specified speed to be reached is the sum of the delay in operation of the mechanical brake and the
acceleration time.
: Set a desirable torque limit level.
: Set a desirable torque limit level.
Function
0.0-249.9 (%),
250.0: Disabled
0.0-249.9 (%),
250.0: Disabled
0: Constant output limit
1: Constant torque limit
Function
0: In sync with acceleration /
1: In sync with min. time
F-71
Adjustment range
Regenerative braking torque limit 1 : 
Regenerative braking torque limit 2 : 
Adjustment range
deceleration
E6581697
Default setting
250.0
250.0
0
6
Default setting
0