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Rockwell Automation Publication 750-RN034B-EN-P - November 2014
PowerFlex 753 Drives (revision 10.003)
DeviceLogix Parameters not Updating
This revision of drive firmware resolves an anomaly within DeviceLogix where
parameters display an incorrect value for short period of time. When this
behavior occurs the parameter value will show correctly, then switch to an
incorrect value, then back to the correct value.
Drive Behavior when a Reverse Commanded is given at Zero Speed
This revision of drive firmware resolves an anomaly when a reverse command is
given and the drive is at zero speed. In previous firmware revisions, when the
drive is given a run reverse command and a zero speed command the drive would
run forward at the minimum speed. The drive will now use the sign bit of the
speed command to determine the minimum value it shall use.
Inertia Compensation with Current Limit Stop
This revision of drive firmware resolves an anomaly when using inertia
compensation, a current limit stop, and the drive is in an I/O connection. In
previous revisions of drive firmware, when “Inertia Compensation LPFBW”
[698] is set to 0 the inertia compensation would become unstable on a current
limit stop and may not always ramp to 0. This revision of drive firmware corrects
this behavior to ensure the current limit stop ramps to 0 under the condition
previously described.
PTC Status on 22-Series I/O Cards
This revision of drive firmware resolves an issue with the 22-Series I/O option
cards more specifically the PTC function. The “PTC Status” [P41] has three
different status configurations that are dependent on the PTC voltage threshold.
The behavior of the PTC status has been updated to properly align with the
engineering thresholds.
Automatic and Manual Speed Reference During Comm Loss
This revision of drive firmware corrects an anomaly when a “Comm Loss” fault
occurs and a communication card is in port 6 of the drive and in manual mode.
Previously, when the fault occurred and the communication card switched the
command to an automatic mode, but the reference would remain in manual
mode with port 6. With this revision of drive firmware the logic has been
corrected to allow the control of the reference to switch to automatic mode when
a “Comm Loss” fault occurs.
