Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
87
5.6.3.3 Starting the motor in blockage clearing mode
Functionality
This startup mode momentarily reverses the motor rotation to clear a pump blockage.
Typical application field
Pump clearing
Setting parameters
Parameter Function Setting
P3350[0...2] Super torque mode = 3: Enable blockage clearing 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.
If blockage clearing mode is enabled (P3350 = 3), make sure
that reverse direction is not inhibited, i.e. P1032 = P1110 = 0.
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)
P3361[0...2] Blockage clearing frequency [Hz] This parameter defines the frequency at which the inverter runs
in the opposite direction to the setpoint during the blockage
clearing reverse sequence.
Range: 0.0 ... 599.0 (factory default: 5.0)
P3362[0...2] Blockage clearing reverse time [s] This parameter sets the time for which the inverter runs in the
opposite direction to the setpoint during the reverse sequence.
Range: 0.0 ... 20.0 (factory default: 5.0)
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