Lenze E94AxPExxxx - Manual (Page 314)

8 Braking operation
8.2 Monitoring
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Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
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8.2.4 Overvoltage in the DC bus
If, due to a too high braking energy, the DC-bus voltage exceeds the overvoltage threshold which
results from the mains voltage setting in C00173 , the "Overvoltage in the DC bus" error message is
output and the response set in C00600 is activated (default setting: "Trouble").

Stop!
The brake resistor can be thermally overloaded. Carry out protective measures suitable
for the installation, e.g.:
• Parameterisation of an error response in C00574 and evaluation of the parameterised
error message within the application or within the machine control.
• External interconnection using the thermal contact on the brake resistor (e.g. supply
interruption via the mains contactor and activation of the mechanical brakes).

Note!
If the system is dimensioned correctly, this monitoring function should not respond. If
individual rated data of the actually connected brake resistor are not known, they have
to be determined "empirically".

Note!
For hoist applications, the "Fault" response should be selected in C00600 (in combination
with an emergency stop via mechanical brakes).