4 overvoltage in the dc bus, Overvoltage in the dc bus, Overvoltage – Lenze E94AxPExxxx User Manual
Page 314: In the dc bus, 8braking operation
8
Braking operation
8.2
Monitoring
314
Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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
, the "Overvoltage in the DC bus" error message is
output and the response set in
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
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
(in combination
with an emergency stop via mechanical brakes).