Rockwell Automation Publication 750-PM001N-EN-P - February 2017 517
Integrated Motion on EtherNet/IP Application Appendix F
Motor Overload
There is a difference between how Kinetix handles an overload condition
compared to the PowerFlex755 drive. Kinetix is motor capacity whereas
PowerFlex 755 is motor overload.
The Motion attribute, Inverter Capacity, is a real-time estimate of the continuous
rated motor thermal capacity that is used during operation, which is based on the
motor thermal model. A value of 100 % indicates that the motor is being used at
100 % of rated capacity as determined by the continuous current rating of the
motor.
The PowerFlex 755 parameter 940 [Drive OL Count] indicates power unit
overload (I
2
T) in percentage. The value of this parameter remains at 0 until 100
% of Rated Current is reached. At 100 % of Rated Current, Overload
measurement begins and the power unit overload fault occurs.
Positive and Negative Overtravel Input
When the PowerFlex 755 drive is in integrated motion mode, Logix allows
configuration of the Positive or Negative Overtravel inputs on an I/O module in
Port 7 of the drive. After the inputs are configured in the drive firmware, if the
Positive or Negative Overtravel Input is activated, the drive firmware generates a
Positive or Negative Overtravel fault. When the fault occurs the drive axis coasts
to a stop. This fault action is not configurable.
Pre-charge OK Input
This feature extends the precharge input monitoring capability to the PowerFlex
755 drive in integrated motion. The event processing is as follows:
1. If the configured Pre-charge OK Input becomes inactive and the drive is in
the Stopped state, the drive enters the precharge state.
2. If the configured Pre-charge OK input becomes inactive and the drive is in
the Running state, the drive generates the Converter Pre-charge Input
Deactivated exception and performs a Fault Coast Stop.
Brake Output
This feature provides for the configuration of the Brake Output functionality via
a relay output to the PowerFlex 755 in integrated motion only.
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