Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 231
8400 StateLine C | Reference manual
Motor control (MCTRL)
Braking operation/brake energy management
How to set the "inverter motor brake" function for a maximum acceleration ramp:
For V/f characteristic open-loop control/closed-loop control (VFCplus):
• Set reduced brake chopper threshold (C00174
) to approx. 70 V.
• Set additive speed (C00987
) to 1,5 ... 2,5-fold rated slip speed.
• Adapt the deceleration ramp so that the deceleration time is slightly below
(10 ... 30 %) the deceleration time that can be realised with the inverter motor
brake.
For sensorless vector control (SLVC):
• Set reduced brake chopper threshold (C00174
) to approx. 70 V.
• Set additive speed (C00987
) to 2 ... 4-fold rated slip speed.
• Adapt the deceleration ramp so that the deceleration time is slightly below
(10 ... 30 %) the deceleration time that can be realised with the inverter motor
brake.
5.11.3 Avoiding thermal overload of the brake resistor
Parameterisation of an error response in C00574
and evaluation of the parameterised
error message within the application or within the machine control system.
– See chapter entitled "Brake resistor monitoring (I2xt)
". ( 237)
External interconnection using the thermal contact on the brake resistor (e.g. supply
interruption via the mains contactor and activation of the mechanical brakes).
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