Siemens SIRIUS 3RW55 Equipment Manual page 138

Functions
8.1 Start-up
continuously and linearly according to the set parameters until the motor has completed its run-
up.
For optimum torque control during the starting procedure, enter the motor data of the motor
connected to the 3RW55 or 3RW55 Failsafe soft starter in the selected parameter set.
Application
• E.g. conveyor belts
Setting via 3RW5 HMI High Feature
• Menu: "Parameters > Soft Starter > Parameter set 1 / 2 / 3 > Start settings > Starting mode >
Torque control"
• Menu (Parameters): "Parameters > Soft Starter > Parameter set 1 / 2 / 3 > Start settings"
• Access protection to the 3RW5 HMI High Feature is not active or has been reset.
Torque curve
①
②
③
④
⑤
⑥
⑦
M
e
n
e
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Torque with direct-on-line starting without 3RW55 or 3RW55 Failsafe soft starter
Torque with short ramp-up time
Torque with long ramp-up time
Torque of the load
Acceleration torque = Difference between activation torque and torque of load
Parameterizable limiting torque
Parameterizable starting torque
Rated torque
Rated operating speed of the motor
SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006