Siemens CU240B-2 Parameter Manual page 176

Parameters
List of Parameters
p1232[0...n] DC braking, braking current / DCBRK I_brake
Access level: 2
Can be changed: U, T
Units group: -
Min
0.00 [Arms]
Description: Sets the braking current for DC braking.
Dependency: Refer to: p1230, p1231, p1233, p1234, r1239, p1345, p1346
Note: A change to the braking current becomes effective the next time that DC braking is switched-on.
The value for p1232 is specified as an rms value in the 3-phase system. The magnitude of the braking current is the
same as that of an identical output current at frequency zero (see r0067, r0068, p0640). The braking current is
internally limited to r0067.
For vector control, a current value of 1.4142 x p1232 is obtained in the output phase U. For U/f control, the phase
angle is offset by -30 degrees to obtain a current measurement of 1.2247 x p1232 in output phase U.
For the current controller, the settings of parameters p1345 and p1346 (I_max limiting controller) are used.
p1233[0...n] DC braking time / DCBRK time
Access level: 2
Can be changed: U, T
Units group: -
Min
0.0 [s]
Description: Sets the DC braking time (as fault response).
Dependency: Refer to: p1230, p1231, p1232, p1234, r1239
p1234[0...n] Speed at the start of DC braking / DCBRK n_start
Access level: 2
Can be changed: U, T
Units group: -
Min
0.00 [rpm]
Description: Sets the starting speed for DC braking.
If the actual speed falls below this threshold, then DC braking is activated.
Dependency: Refer to: p1230, p1231, p1232, p1233, r1239
r1239.8...13 CO/BO: DC braking status word / DCBRK ZSW
Access level: 2
Can be changed: -
Units group: -
Min
-
Description: Status word of the DC braking.
Bit field: Bit Signal name
08 DC braking active
10 DC braking ready
11 DC braking selected
12 DC braking selection internally inhibited
13 DC braking for OFF1/OFF3
Dependency: Refer to: p1231, p1232, p1233, p1234
Note: Re bit 12, 13:
Only effective for p1231 = 14.
1-176
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
10000.00 [Arms]
Calculated: -
Scaling: -
Unit selection: -
Max
3600.0 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
210000.00 [rpm]
Calculated: -
Scaling: -
Unit selection: -
Max
-
1 signal
Yes
Yes
Yes
Yes
Yes
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: MDS
Factory setting
0.00 [Arms]
Data type: FloatingPoint32
Data set: MDS
Factory setting
1.0 [s]
Data type: FloatingPoint32
Data set: MDS
Factory setting
210000.00 [rpm]
Data type: Unsigned32
Data set: -
Factory setting
-
0 signal
No
No
No
No
No
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FP
7017
7017
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-
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