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Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
231
DC braking parameters
Table 7- 34 Parameters for configuring DC braking
Parameter Description
p1230
Activate DC braking (BICO parameter)
The value for this parameter (0 or 1) can be either entered directly or specified by
means of an interconnection with a control command.
p1231
Configure DC braking
•
p1231 = 0, no DC braking
•
p1231 = 4, general enabling of DC braking
•
p1231 = 5, DC braking for OFF1/3, independent of p1230
•
P1231 = 14, enables DC braking for the case that the motor speed falls below the
start speed for DC braking.
Table 7- 35 Parameters for configuring DC braking in the event of faults
Parameter Description
p2100
Set fault number for fault reaction (factory setting: 0)
Enter the fault number for which DC braking should be activated, e.g.: p2100[3] = 7860
(external fault 1).
p2101 = 6 Fault reaction setting (factory setting: 0)
Assigning the fault response: p2101[3] = 6.
The fault is assigned an index of p2100. The associated fault response must be assigned the same
index in p2101.
In the List Manual of the inverter - in the "Faults and alarms" list - possible fault responses are listed
for every fault. The entry "DCBRAKE" means that for this particular fault, DC braking can be set as
fault response.
Table 7- 36 Additional parameters for setting DC braking
Parameter Description
p1232
DC braking braking current (factory setting: 0 A)
Setting the braking current for the DC braking.
p1233
DC braking duration (factory setting: 1 s)
p1234
DC braking start speed (factory setting: 210000 rpm)
DC braking starts – assuming that it has been correspondingly parameterized
(p1230/p1231) – as soon as the actual speed falls below this threshold.
p0347
Motor de-excitation
The parameter is calculated via p0340 = 1, 3.
The inverter can trip due to an overcurrent during DC braking if the de-excitation time is
too short.
Содержание SINAMICS G120 CU230P-2
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