Siemens SINAMICS G120XA, Operating Instructions Manual, Page: 224 / 918

6.3.6 Deragging
Overview
Blockage in the wastewater pumps can reduce the efficiency of the system. With the deragging
function, any clogs on the pump impellers, pipes or valves can be cleared automatically. This
function saves the maintenance efforts for manually cleaning the pumps.
Precondition
Before enabling the deragging, make sure that p1143 = r29640.0 and p1144 = r29641.
Function description
The deragging mode consists of forward and reverse runs of the motors. Parameter p29590
is used to select the deragging mode.
● p29590 = 1: enabled on first run after power-up
● p29590 = 2: enabled on every run
● p29590 = 3: enabled with a Binector input (p29591)
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Parameters
Number Name Factory setting
p29590 Deragging mode 0
p29591 BI: Deragging enable 0
p29592 Deragging forward speed 500 rpm
p29593 Deragging reverse speed 500 rpm
Advanced commissioning
6.3 Pump control
SINAMICS G120XA converter
222
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB