Setting The Dual Ramp Function - Siemens SINAMICS V20 Operating Instructions Manual

Commissioning via the built-in BOP
5.6 Function commissioning
5.6.3.17

Setting the dual ramp function

Functionality
The dual ramp function allows the user to parameterize the converter so that it can switch
from one ramp rate to another when ramping up or down to a setpoint. This may be useful
for delicate loads, where starting to ramp with a fast ramp-up or ramp-down time may cause
damage. The function works as follows:
Ramp up:
● Converter starts ramp-up using ramp time from P1120
● When f_act > P2157, switch to ramp time from P1060
Ramp down:
● Converter starts ramp-down using ramp time from P1061
● When f_act < P2159, switch to ramp time from P1121
Note that the dual ramp algorithm uses r2198 bits 1 and 2 to determine (f_act > P2157) and
(f_act < P2159).
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SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012