Setting The Dc Coupling Function - Siemens SINAMICS V20 Operating Instructions Manual

Commissioning
5.6 Function commissioning
Setting parameters
Parameter Function
P1175[0...2] BI: Dual ramp enable
P1060[0...2] JOG ramp-up time [s]
P1061[0...2] JOG ramp-down time [s]
P1120[0...2] Ramp-up time [s]
P1121[0...2] Ramp-down time [s]
P2157[0...2] Threshold frequency f_2 [Hz]
P2159[0...2] Threshold frequency f_3 [Hz]
5.6.3.17

Setting the DC coupling function

Functionality
The SINAMICS V20 inverter provides the facility to electrically couple two equal-size
inverters together by using the DC link connections. The key benefits of this connection are:
● Reducing energy costs by using regenerative energy from one inverter as driving energy
in the second inverter.
● Reducing installation costs by allowing the inverters to share one common dynamic
braking module when needed.
● In some applications, eliminating the need for the dynamic braking module.
In the most common application, shown in the following figure, linking two SINAMICS V20
inverters of equal size and rating allows the energy from one inverter, presently decelerating
a load, to be fed into the second inverter across the DC link. This requires less energy to be
sourced from the mains supply. In this scenario, the total electricity consumption is reduced.
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Setting
This parameter defines command source of dual ramp enable
command. If binary input is equal to one, then the dual ramp
will be applied. The factory default value is 0.
This parameter sets the JOG ramp-up time.
Range: 0.00 to 650.00 (factory default: 10.00)
This parameter sets the JOG ramp-down time.
Range: 0.00 to 650.00 (factory default: 10.00)
This parameter sets the time taken for motor to accelerate
from standstill up to maximum frequency (P1082) when no
rounding is used.
Range: 0.00 to 650.00 (factory default: 10.00)
This parameter sets the time taken for motor to decelerate
from maximum frequency (P1082) down to standstill when no
rounding is used.
Range: 0.00 to 650.00 (factory default: 10.00)
This parameter defines threshold_2 for comparing speed or
frequency to thresholds.
Range: 0.00 to 550.00 (factory default: 30.00)
This parameter defines threshold_3 for comparing speed or
frequency to thresholds.
Range: 0.00 to 550.00 (factory default: 30.00)
Operating Instructions, 09/2014, A5E34559884
SINAMICS V20 Inverter