Eaton PowerXL DE1 series Manual

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6 Parameter6.5 Parameter description100 DE1… Variable Speed Starter 11/16 MN040011EN www.eaton.com6.5.5 DC brakingWhen using DC braking, DE1... variable speed starters apply a DC voltage tothe stator windings of the connected three-phase motor. This makes it possi-ble to brake motors that are already rotating (e.g., pumps and fans) beforestarting them, as well as to hold braked motors (e.g., handling equipmentand winding gear) in a stop position for a specific time.DC braking can be activated with parameter P-25, while parameter P-26 canbe used to define the braking time (maximum: 10 seconds). The brakingvoltage and the resulting braking torque can be adjusted with P-27 as apercentage of nominal motor voltage P-07. Higher values will produce ahigher braking torque, but will also result in increased motor heating.If a deceleration ramp is active (P-05 = 1), parameter P-28 can be used todefine an activation frequency at which the device will automatically switchto DC braking if a stop command has been issued.If P-05 = 0 (“coasting”), DC braking will be activated as soon as a stopcommand is given. In this case, P-28 will be ignored.Table 24: DC braking parametersPNU Modbus ID Access right Name Value DS DescriptionRUN,STOPro/rwP-05 133 RUN rw Stop mode 0/1 1 Stop modeUsed to define how the DE1 variable speedstarter will behave if the enable signal(FWD/REV) is switched off:1: The drive will decelerate with the timeset in P-04 all the way to 0 Hz (stop).0: The drive will decelerate uncontrolled(coast) all the way to a stop.P-25 153 STOP rw DC braking 0 - 3 0 DC braking, functionUsed to define the operating states inwhich DC braking will be activated.0 = deactivated1 = Activated in the event of a STOP (P-26)2 = Activated before START (P-26)3 = Activated before START and in theevent of a STOPP-26 154 RUN rw t-DCBrake@stop0 - 10 s 0.0 s DC braking, timeDC braking durationP-27 155 RUN rw DC brakingvoltage(0 - 100 %) P-07 0.0 s DC braking, voltagePercentage of the motor voltage for DCbraking.P-28 156 RUN rw f-DCBrake@stop0 - P-01 0.0Hz DC braking, frequencyOutput frequency in Hz for activating DCbraking during the deceleration phase(P-05 = 1).