Lenze 9400 - Manual (Page 271)

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
271
7 Braking operation
7.2 Monitoring
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
• When the utilisation reaches the limit value (100 %):
• The response set in C00574 (default setting: "No response") is activated with the
corresponding effects on the state machine and the inverter.
• Only applies to software versions lower than V3.0:
The activation of the brake chopper is reset to the permanently permissible mark-to space
ratio (taking the parameterised brake resistance into consideration). (The brake chopper is
activated with 4 kHz, which means that it can be switched on/off at minimum intervals of
250 μs.)

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".