Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
85
5.6.3.2 Starting the motor in hammer start mode
Functionality
This startup mode applies a sequence of torque pulses to start the motor.
Typical application field
Very sticky pumps
Setting parameters
Parameter Function Setting
P3350[0...2] Super torque mode = 2: Enable hammer start mode
Note: When the value of P3350 is changed, the value of P3353
is changed as follows:
• P3350 = 2: P3353 = 0.0s
• P3350 ≠ 2: P3353 = default
The ramp time of 0s gives an additional 'kicking' effect when
hammer start is in use.
P3351[0...2] BI: Super torque enable This parameter defines the source of the super torque enable.
The setting is effective when P3352 = 2.
Factory default: 0 (never enabled)
P3352[0...2] Super torque startup mode This parameter defines when the super torque function
becomes active.
= 0: Enabled on first run after power-up
= 1: Enabled on every run
= 2: Enabled by digital input (enable source is defined by
P3351; 0 = never enabled, 1 = enabled on every run)
P3353[0...2] Super torque ramp time [s] This parameter defines the ramp time to be used when ramping
up to the super torque frequency.
Range: 0.0 ... 650.0 (factory default: 5.0)
P3354[0...2] Super torque frequency [Hz] This parameter defines the frequency at which the additional
boost is applied for super torque mode.
Range: 0.0 ... 599.0 (factory default: 5.0)
P3357[0...2] Hammer start boost level [%] This parameter sets the temporary boost level for hammer start
mode.
It applies boost in [%] relative to P0305 (rated motor current)
once the super torque frequency has been reached for the time
specified in P3356.
Range: 0.0 ... 200.0 (factory default: 150.0)
P3358[0...2] Number of hammer cycles This parameter defines the number of times the hammer start
boost level is applied.
Range: 1 - 10 (factory default: 5)
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