Lenze L-force HighLine C 8400 Series Reference Manual page 294

8400 HighLine C | Reference manual
Motor control (MCTRL)
Monitoring
Temperature model
[5-35] Signal flow for monitoring the brake resistor
The monitoring function calculates the braking current I
U and the brake resistance parameterised in C00129:
DC_act

Note!
The monitoring function can also be triggered due to a value entered in
although a brake resistor is not even connected.
 During the calculation, the thermal utilisation of the brake resistor on the basis of the
following parameters is taken into consideration:
– Resistance value (C00129)
– Continuous power (C00130)
– Thermal capacity (C00131)
 In the Lenze setting these parameters are preset with the corresponding power-
adapted Lenze brake resistor.
C00133

– A utilisation of 100 % corresponds to the continuous power of the brake resistor
depending on the maximally permissible temperature limit.
Related topics:
Braking operation/brake energy management
294
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Temperature model
I
Br
C00129
C00130
C00131
I = 1
On
I = 0
Off
Error message:

indicates the calculated utilisation of the brake resistor in [%].
L
J
2
I xt
C00138
C00572 C00574
"OC12: I2xt overload brake resistor"
from the current DC-bus voltage
Br
U
DC_act
I
= ------------------- -
Br
C00129
( 279)
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
)
C00129