Auxiliary 24V Power Cycle Causes Pred NVS Error

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When power is applied to a PowerFlex® 755T Frame 6 bus supply with auxiliary 24V DC control power only and the 24 auxiliary control power is removed, fault 14022 ‘Pred NVS Error’ can occur. This fault does not occur if power is applied to the bus supply with line voltage and line voltage is removed.

Cannot Change Parameter Assigned to a Datalink

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

Parameters assigned to a communication module datalink could not be changed.

Control Pod Fans Do Not Turn on with CPU Over Temperature Fault

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

The control pod fans did not turn on when a ‘CPU OverTemp Flt’ (F17) fault occurred.

Digital Input Configuration B and C Alarms do no Occur for Parameter 0:118 DI M HOA Start

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When the configuration of parameter 0:118 [DI M HOA Start] conflicts with the configuration of another digital input parameter, a ‘DigIn Cfg B’ or ‘DigIn Cfg C’ alarm does not occur.

Encoder Alternate Feedback uses Primary Feedback Offset

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When an alternate encoder is configured, the alternate encoder feedback channel is using the primary encoder offset value instead of the alternate offset value.

Firmware Issues Causes Nuisance Phase Loss Detection and Phase Loss Ride Through Time Expiration Faults

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When a significant drop in load current occurs a nuisance Phase Loss Detection (F13003) and Phase Loss Ride Through Time Expiration (F13004) Fault can occur.

Missing Event Conditions Restored

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

The following Event conditions previously did not display for PowerFlex® 755T products:

• Conditions Cleared - At powerup condition data corrupt or missing

• Application Started - Application program is starting

• Application Stopped - Control Power removed

• New Firmware - New Firmware was loaded to the drive

• Drive Reset - Drive reset requested

• Drive Started - Drive commanded to run

• Drive Stopped - Drive no longer running (for example, not modulating output PWM)

• Drive Faulted - First fault occurrence since reset was issued

• Alarm Queue Cleared - DPI Alarm queue cleared

• Event Queue Cleared - DPI Event queue cleared

• Exception Queue Cleared - DPI Exception queue cleared

Port 10 Datalink Values for PROFINET Set to Zeros After Power Cycle

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When using a PROFINET single-port or dual-port option modules with a PowerFlex® 755TL or 755TR drive or 755TM common bus inverter, the datalink values in port 10 get set to zeros after a power cycle.

Position Actual has Accumulated Error when Using Zero Position

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

After a point-to-point move in position loop mode, the value of parameter 10:1745 [Position Actual] did not correctly match the values of parameter 10:1756 [Position Feedback] and the encoder feedback option module position feedback counts.

Predictive Maintenance Parameters Not Updating

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

The following Predictive Maintenance parameters were not updating.

Percent Life parameters: 14:141 [L0BusCapPctLife], 14:138 [L0IGBT PctLife], and 14:1248 [F0 Cap PctLife]

Remaining Life parameters: 14:143 [L0BusCapRmngLife], 14:140 [L0IGBT RemainLif], and 14:1250 [F0 Cap RmngLife]

Elapsed Life parameters: 14:142 [L0BusCapElpsdLif], 14:139 [L0IGBT ElpsdLife], and 14:1249 [F0 Cap ElpsdLif]

Status Bits and Feedback Values Incorrect with Power Loss or Undervoltage Fault

Corrected Anomaly with PowerFlex 755T Firmware Revision 6.004

When a Power Loss fault (F10001/11001) occurs or an Undervoltage fault (F10106/11106) occurred, the drive stopped but status bit and feedback values were incorrect.

Permanent Damage to Predictive Maintenance Data for Frames 5 and 6 When Firmware is Upgraded or Downgraded

Corrected Anomaly with PowerFlex 755TL/TR/TM Firmware Revision 13.001

A structural difference in the EEPROM memory map between firmware revisions 12 or earlier and revisions 13 or later led to the loss of predictive maintenance data during firmware updates or downgrades.

Permanent data loss occurred under the following conditions:

• Firmware update from revision 12 or earlier to revision 13 or 14
• Firmware downgrade from revision 13 or 14 to revision 12 or earlier

This issue affected PowerFlex® 755TL, 755TR, and 755TM products with frame sizes 5 and 6. Other frame sizes were not impacted. PowerFlex 755TS products were also unaffected.

To resolve this issue, you can update from revision 12 or earlier directly to revision 14.002, which restructures the data to align with the newer memory map.

Note: Once a drive is at revision 14.002, downgrading to revision 12 or earlier results in data loss.

Digital Output Momentarily Energizes During Drive Power-up

Known Anomaly First Identified as of PowerFlex 755TL/TR/TM Firmware Revision 14.001

Known Anomaly First Identified as of PowerFlex 755TS Firmware Revision 14.001

A digital output will momentarily energize during power-up if it is configured to follow a bit that is normally on (one) and is set to invert the logic of that bit.

For example, consider the configuration where the first relay output on an IO card in slot 5 is set to follow the Brake Set bit in the Torque Prove Status parameter, and the logic is inverted:

• Parameter 5:10 [RO0 Sel] is mapped to parameter 9:52 [Trq Prove Status] bit 4 'Brake Set', which is normally on (one).

• Bit 0 'Relay Out 0' is set (one) in parameter 5:6 [Dig Out Invert].

• When the drive powers up, it momentarily energizes the relay output.

If the signal from this digital output is used to release a brake in a torque-proving application, such as within a crane or hoist, the brake will momentarily release during the drive's power-up.

To avoid this undesirable behavior in the above torque-proving example, configure the digital output to follow the Brake Release bit instead of the Brake Set bit in the Torque Prove Status parameter without inverting the logic:

• Map parameter 5:10 [RO0 Sel] to parameter 9:52 [Trq Prove Status] bit 8 'BrakeRelease', which is normally off (zero).

• Reset bit 0 'Relay Out 0' in parameter 5:6 [Dig Out Invert] to a value of zero.

11-Series I/O Option Module Does Not Work with 20-750-ATEX Option Module in Slot 6

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

An 11-Series I/O module with the 20-750-ATEX option module in slot 6 does not work. The module does not appear in port 6. There is no alarm or fault.

Bit 0 of Parameter 201 Not Set When Auxiliary Fault Occurs

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Bit 0 'Stop' of parameter 0:201 [LS Logic Rslt] is not set when an auxiliary fault occurs.

Certain Communication Modules Do Not Function with PowerFlex 755T Drives and Bus Supplies

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Communications option modules (20-750-PBUS, 20-750-PNET and 20-750-PNET2P) do not function with 755T drives and bus supplies. This is due to a limitation in the firmware of the option modules.

Current Limit Parameter Offline Default Not Used

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The offline default of parameter 13:100 [Current Limit] is zero. It should be equal to the 3-second rating of the Line Side Converter. This is the online default. If you leave it at zero in the offline project and download the project, the drive or bus supply will use the online default.

Digital Input Functions for Line Side Converter Do Not Clear Faults

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The digital input functions for Line Side Stop does not clear faults.

Drive Enunciates Drive Overload as a Stator Overload

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Under some conditions the drive enunciates Drive Overload as a Stator (motor) Overload.

Drive Fails to Maintain Z-Channel Fault on 20-750-UFB1 Module

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive fails to maintain a Z-Channel Fault on a 20-750-UFB-1 module. If the Z channel is disconnected the drive produces the proper fault. However if the motor is not moving, the drive allows a user to clear the fault when the channel is still disconnected. The drive reproduces the fault when the motor moves.

Drive or Bus Supply Cannot Detect Alarm or Fault 664

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The bus supply or drive cannot detect the 664 ‘Rem Med Not Inst’ alarm or fault. Features that use removable media have not yet been activate. 

Drive or Bus Supply Crash when LCL Filter is Not Installed or Connected with Fiber-optics

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive or bus supply can crash when receiving parameter values to port 13 or 14. This only occurs if an LCL filter is left uninstalled or without fiber optic connections.

Drive or Bus Supply Fails to Respond to Device Reset Properly

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive or bus supply fails to respond to a Device Reset properly. This anomaly prevents a software tool from uploading the configuration of the drive or bus supply.

Drive or Bus Supply in Partial Precharge May Display Faults and Alarms with ‘20’ Prefix

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

If the drive or bus supply is stuck in ‘partial precharge’ it may display faults and alarms with the ‘20’ prefix. These are unmapped faults and alarms. This may occur with faults and alarms in power peripherals that do not log in during the ‘partial precharge’. A partial precharge occurs when the drive or bus supply powers up without its power peripherals (Motor Side Inverter power modules, Line Side Converter power modules and precharge modules). This can occur when a user energizes 24V auxiliary power without energizing three phase power.

Drive or Bus Supply Write Mask Config Parameter Can Block Port Currently Writing Values

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive or bus supply allows users to block the port they are writing from in parameter 0:230 [Write Mask Cfg]. If a user inadvertently does this, he or she can use the Rotary IP Switches to reset the parameter to its default value. This is accomplished by setting the switches to 888, cycling power, powering down, putting the switches back to the operational values and then energizing again.

Drive Produces Same Fault Code for Different Errors on 20-750-UFB-1 Module

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive produces the same fault code for the Aux VelFdbk Loss and Ch0 AnalVal Err conditions on a 20-750-UFB-1 module. It does produce the correct fault code text.

The drive produces the same fault code for the PositionFdbkLoss and Ch0 Ch0 SendCurr Err conditions on a 20-750-UFB-1 module. It does produce the correct fault code text.

Drive Produces Same Fault Code for Safety Jumper In and Bipolar Conflict

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The drive produces the same fault code for the Safety Jumper In and Bipolar Conflict conditions. It does produce the correct fault code text.

Enumerations in Parameters for DeviceLogix Not Functional

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Some parameters include enumerations for DeviceLogix, even though DeviceLogix is not available in this revision of firmware.

Explicit Message from Communication Modules Do Not Modify Parameters Numbered Above 1023

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Communications option modules (20-750-CNETC, 20-750-DNET, 20-750-ENETR, 20-750-PBUS, 20-750-PNET and 20-750-PNET2P) will not allow an explicit message to modify parameters above number 1023 in non-zero ports. This is due to a limitation in the firmware of the option modules.

HIM Fault/Alarm Queues Display 100 as 10

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Fault and alarm queues in the HIM may display the number of entry 100 as ‘10’.

PID Deriv Time Parameter Accepts Values That Cannot be Displayed

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Parameter 9:6 [PID Deriv Time] accepts values with precision beyond the display capability. For example a user can enter a value of 0.009. The internal value will be 0.009, but the display will show 0.01.

Port Verification Function May Ignore Backplane Option Module Changes

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The port verification function may ignore certain types of backplane option module changes.

Precharge Delay Functionality Timing Not Verified

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The timing of the functionality related to parameter 0:38 [Prchrg Delay] has not been verified.

‘Run’ bit in Line Side Logic Result Parameter Not Set

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

Bit 18 ’Run’ of parameter 0:201 [LS Logic Rslt] is not set when the digital input for parameter 0:120 [DI M Run] goes high.

User Definable Text or Process Display Function Does Not Work

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

The User Definable Text or Process Display function does not work.

HIM CopyCat Does Not Work on PowerFlex 755T Products

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

HIIM CopyCat does not work on PF755T products. The HIM firmware does not yet have the capability to properly account for parameters in port 0 that determine the parameters in ports 9 and 10.

Drive Faults on Stator Res Range in SV Mode During Rotate Tuning

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

The drive produces fault F29 ‘StatorRes Range’ when performing a Rotate Motor ID Autotune in sensorless vector mode. This occurs if the drive has a Torque Accuracy Module (TAM) and it is enabled. Only enable the TAM when using flux vector motor control modes. Do not enable it for scalar modes (Volts per Hertz, Sensorless Vector, or Economizer). Clear bit 0 ‘Module Enbl’ in parameter 12:55 [Trq Accy Mod Cfg] when using scalar modes.

Add CIP Identities to NVS File to Allow ControlFlash Update Through 1203-USB

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

You cannot perform a ControlFlash update the drive through a 1203-USB or 1203-SSS adapter.

Connected Components Workbench Attempts to Download Out-of-Range Value for Port 10 Parameter 119

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

If you use Connected Components Workbench™ (CCW) software to change the motor control mode of a 690V drive to Flux Vector, CCW will attempt to download an out-of-range value for parameter 10:119 [Bus Reg Level] only, to the drive. To work around this anomaly, change the motor control mode with a HIM, reset the drive, and connect CCW to the drive.

Drive Fails to Reconnect After Automatic Device Configuration

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

There are difficulties using Automatic Device Configuration (ADC) and firmware supervisor with PowerFlex 755T products and these PowerFlex communication and ‘Option Developers Kit’ option cards:

• 20-750-ENETR (PowerFlex)
• 20-750-DNET (PowerFlex)
• 20-750-CNET (PowerFlex)
• 20-750sc-8U (Spectrum Controls)

Avoid using the firmware supervisor function with these option cards. When using ADC, you may need to cycle power on the replacement drive. See the PowerFlex 750-Series Drives with TotalFORCE Control Built-in EtherNet/IP Adapter User Manual, publication 750COM-UM009.

Port Verification May Ignore Certain Backplane Option Card Changes

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

The port verification function may ignore certain types of backplane option card changes.

DeviceNet Option Card DataLinks do Not Transmit Data

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

When more than one communication option card is installed, the datalinks on a DeviceNet communications option card (20-750-DNET) will not work.

DeviceNet Datalinks do not work only when the option card is used at the same time as another communications option card (such as 20-750-CNET or 20-750-ENETR) or Options Developer Kit card (such as a Spectrum Controls 20-750sc-8U).

The datalinks work properly if the 20-750-DNET option card is the only communication card installed.

Universal Feedback Option Module DPI Interface Can Become Inactive

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

The DPI interface of the Universal Feedback option card (20-750-UFB-1) becomes inactive under these conditions:

• The red DPI light-emitting diode on the board blinks.
• Bit 31 ‘DPI Ready’ in parameter 1 [Module Sts] of the option card is set to “0”

When the DPI interface is inactive, the feedback and parameter functions operate normally.

The inactive DPI interface only blocks these services: DPI peer messaging, ping messaging, and ControlFlash updates.

The DPI interface becomes inactive when the configured feedback device type is ‘Hiperface SC’ and the encoder hardware is unplugged.

Controller Torque Reference Incorrectly Scaled by Drive with Velocity Units of Hertz

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

The drive incorrectly scales a torque reference from a controller if parameter 0:46 [Velocity Units] is set to 0 ‘Hz’. This occurs only if the Position Velocity Torque mode is set to a form of torque control (Torque Reg or SLAT). If using a torque reference from a controller, set 0:46 [Velocity Units] to a value of 1 ‘RPM’. 

Automatic Device Configuration Encounters Multiple Connection Issues upon Reboot

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 2.001

There are difficulties using Automatic Device Configuration (ADC) and firmware supervisor with PowerFlex 755T products and these PowerFlex communication and ‘Option Developers Kit’ option cards:

• 20-750-ENETR (PowerFlex)
• 20-750-DNET (PowerFlex)
• 20-750-CNET (PowerFlex)
• 20-750sc-8U (Spectrum Controls)

Avoid using the firmware supervisor function with these option cards. When using ADC, you may need to cycle power on the replacement drive. See the PowerFlex 750-Series Drives with TotalFORCE Control Built-in EtherNet/IP Adapter User Manual, publication 750COM-UM009.

Connected Components Workbench Uses Random Characters to Describe the Drive Application Port

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Connected Components Workbench® uses random characters to describe the drive application port (port 9) when it is configured for PID control. This affects the description text only. It does not affect the functionality of the application port.

20-750-UFB-1 Parameter 90 [Rgsn Arm] Returns to Zero After Power Cycle

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Parameter 90 [Rgsn Arm], in the 20-750-UFB-1 universal feedback option module, will return to a value of zero after a power cycle. Use a controller to write the correct value to this parameter after a power cycle, or manually enter it.

20-750sc-8U Parameter 37 [Flt Cfg Logic] Returns to Default Value After Power Cycle

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Parameter 37 [Flt Cfg Logic] in the Spectrum 20-750sc-8U analog option module will return to the default value after a power cycle. Use a controller to write the correct value to this parameter after a power cycle, or manually enter it after each power cycle.

Parameter 54 [FltCfg DL 16] Does Not Respond to Reset to Defaults Command

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Parameter 54 [FltCfg DL 16] of communications and Option Developers Kit (ODK) modules does not get set to its default value in response to a Reset to Defaults command. Communications cards include the 20-750-ENETR, 20-750-CNET and 20-750-DNET. ODK option modules include the Spectrum 20-750sc-8U analog card. Use a controller to write the correct value to this parameter after a Reset to Defaults command, or manually enter it after each Reset to Defaults command.

Parameters 10:146 [Zero Speed Limit] and 10:1643 [Find Home Speed] do not Switch when 0:46 [Velocity Units] is Changed

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Default values of parameters 10:146 [Zero Speed Limit] and 10:1643 [Find Home Speed] do not properly switch when a change to the value of parameter 0:46 [Velocity Units] takes effect. Check the value of these parameters if you make changes to parameter 0:46 [Velocity Units].

Multiple Power Cycles Can Lead to Primary Feedback Loss Detection on Power Up

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Multiple power cycles can lead to Primary Feedback Loss detection on power up. If a feedback loss occurs on power up, check the primary encoder. If there are no problems with the encoder, configure the drive to use the encoder.

Predictive Maintenance Reset Parameters May Fail to Reset when Commanded

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

PowerFlex 755T products may fail to increment the reset parameters for the Predictive Maintenance function when commanded. For example, parameter 12:137 [M0 HSFanResetLog] may fail to increment when you properly set and clear bit 1 ‘M HSFan Life’ of parameter 12:130 [M0PredMaintReset]. If you replace parts that use the Predictive Maintenance function, check to see that the reset log increments when you command it. If the log fails to increment, command another reset.

Connected Components Workbench uses random characters to describe the drive application Port 9

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Connected Components Workbench® uses random characters to describe the drive application port (port 9) when it is configured for PID control. This affects the description text only. It does not affect the functionality of the application port.

Invalid Product Configuration Can Cause Connected Components Workbench Software to Crash

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

An invalid product configuration can cause Connected Components Workbench® software to crash. For example, a drive with the wrong LCL filter module will show a message on the HIM that indicates ‘Invalid Product’.  CCW may crash if you attempt to connect it to the example drive. Use the HIM to troubleshoot a product if CCW crashes.

Fault Queue may Display Double Entries for Same Fault

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The fault queue may display double entries for the same product fault. These entries will have the same time stamp. Ignore the extra entries.

Human Interface Module (HIM) does not Display ‘Autotuning’ During Autotune Test

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The HIM does not display ‘Autotuning’ while the drive is performing an autotune test. Older PowerFlex 755 drives display this message. Customers of older 755 drives may expect this message to display when running an Autotune.

Read-only Parameters Cannot be Connected to Datalinks on Communication Option Modules

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

Read-only parameters cannot be connected to Datalinks on the 20-750-ENETR, 20-750-CNETC or 20-750-DNET communication option modules. Instead of Datalinks, use explicit message read commands to access read-only parameters. This anomaly does not affect the embedded EtherNet/IP interface on the main control board.

Drive does not Annunciate Primary Velocity Feedback Option Module Removal on Power Up

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The drive does not annunciate the removal of the primary velocity feedback option module on power up if the card is removed while the drive is powered down. The drive will inhibit starting until you acknowledge the configuration change.  Acknowledge the configuration change by putting a value of 1 ‘Accept’ in parameter 0:91 [Cfg Acknowledge].

Digital Input Function for Return Home does not Work

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The digital input function for Return Home does not work. This digital input function is configured with parameter 0:171 [DI Return Home]. Use bit 3 ‘Return Home’ of parameter 10:1640 [Home Ctrl Opts].

Forward End Limit Does Not Cause Fault after Emergency Override Is Removed

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

When the Emergency Override function is enabled, it properly overrides the Forward End Limit fault. When the Emergency Override function is disabled again, the Forward End Limit causes the drive to stop. It does not produce the fault.

Power Cycling Causes False Safety Initialization Errors

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The drive rarely produces a false Safety Initialization Error after a power cycle.  Safety Initialization Errors are annunciated by fault 344 ‘SafetyInit Error’.

Precharge Open Condition Bit 8 ‘Prchrg Open’ not Set

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

PowerFlex 755T products do not properly set bit 8 ‘Prchrg Open’ of parameter 10:462 [Fault Status B] when the precharge open condition occurs. The product does properly annunciate the problem with faults and alarms. Do not rely on this bit for troubleshooting.

High Speed Trending Does Not Work with Parameter 10:1750 [Position Error]

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

The High Speed Trending function does not create trends of parameter 10:1750 [Position Error].

Firmware Update Fails without Three-phase Power Applied

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 3.001

To update a drive or bus supply to this revision of firmware by using ControlFlash, three-phase power must be applied. A firmware update cannot be accomplished with only 24V auxiliary power.

Perform the ControlFlash firmware update procedure with three-phase power energized.

Improper Current Feedback Scaling for Some 480V Products

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 1.001

An incorrect analog to digital scaling factor causes some 755T products to read a value for power module current that is higher than the actual value. The error is approximately 6% of the rating. This will effectively reduce the operating rating by 6% at maximum temperature. For example, a drive with a 505 A rating will be limited to 474 A. If the output exceeds 474 A at the rated operating temperature, the thermal manager will fold back the output. If the output exceeds 474 A, the drive overload function will activate. 

This anomaly affects drives and bus supplies (products) that use the following power modules in a 480V configuration:

• 20-750-MI1-C540D505,
• 20-750-MI2-C540D505, and
• 20-750-MI3-C540D505

This anomaly affects products with these catalog strings:

• 20G…C540...,
• 20G...D505...,
• 20J…C540...,
• 20J...D505...,
• 20G…C1K0...,
• 20G...D960...,
• 20J…C1K0... and
• 20J...D960....

STS Status Indicator Flashing Green when Not Ready

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

The “STS” (Status) indicator may appear as "flashing green" when the drive is in a "not ready" state.

Emergency Override Parameters Do Not Reset when the Drive is Reset to Defaults

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

When a PowerFlex 755T product is reset to defaults, the Emergency Override parameters 0:134 [Over Volt Dly B], 0:454 [Emerg OVRD Mode], and 0:455 [Emerg Prot OVRD] settings will remain unchanged.

ControlFLASH Firmware Update Function Does Not Work for Human Interface Modules

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

The ControlFLASH firmware update function does not work for human interface modules (HIMs).

ControlFLASH Firmware Update Function Does Not Work for Option Modules

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

The ControlFLASH firmware update function does not work for option modules.

Drive Stator Resistance Range Fault Occurs in Sensorless Vector Mode During a Rotate Tune

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

The drive produces a ‘Stator Res Range’ fault (10029/11029) when performing a Rotate Motor ID Autotune in sensorless vector mode. This occurs if the drive has a torque accuracy module (TAM) and it is enabled.

Drive Annunciates a Drive Stator Overload as Motor Stator Overload

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

Under some conditions, the drive enunciates a ‘Drive Overload’ fault (10027/11027) as a ‘Str Overload Flt’ fault (12048).

Error When Creating Non-English Database from a Device

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.001

An error can occur if you attempt to create a non-English database from an existing device. It is recommended that you use only non-English databases downloaded from the Product Compatibility and Download Center (PCDC).

You can access the PCDC here: http://www.rockwellautomation.com/global/support/pcdc.page

Changing Motor Control Mode Parameter 0:65 [Pri MtrCtrl Mode] Results in Incorrect Value in Parameter 10:699 [PM Vel Max]

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 4.002

The default value of parameter 10:699 [PM Vel Max], which is 60 Hz, may change to 2 Hz when changing the default motor control mode setting in parameter 0:65 [Pri MtrCtrl Mode] to 5 ‘IPM FV’ or 6 ‘SPM FV.’ After changing the motor control mode to 5 ‘IPM FV’ or 6 ‘SPM FV’ in parameter 0:65, change the value of parameter 10:699 back to the default value of 60 Hz, if needed.

Brake Slip Fault Configuration Bit Not Functional for Torque Prove in PowerFlex 755T Products

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

Bit 10 ‘BrkSlpFltCfg’ in parameter 9:50 is not functional. Setting this bit should inhibit the brake slip fault if brake slip is detected when the enable input or safety enable input is low.

DPI Loss after Changing Motor Control Modes

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

A DPI Loss may occur after the motor control mode is changed from the previous setting.

Drives and Bus Supplies may Freeze during a Soft Reset

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

PowerFlex 755TL/TR drives and PowerFlex 755TM bus supplies may freeze while performing multiple soft resets in short periods of time.

Encoder Quadrature Fault Does Not Get Set

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

In some cases, an encoder quadrature fault may not get set properly when the encoder signals are removed from drive and these option modules are installed:

• Integrated Safety Functions option module (catalog number 20-750-S4)
• Universal Feedback option module (catalog number 20-750-UFB-1)

Intermittent Dual-port EtherNet/IP Option Module Communication Loss Faults

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

When using two PowerFlex® Universal Feedback option modules (catalog number 20-750-UFB-1) with a PowerFlex Dual-port EtherNet/IP option card (catalog number 20-750-ENETR), you may experience intermittent “System Comm Loss” faults (nn999).

Power Interface Board Over Temperature Fault Not Active

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

When using the Emergency Override, Purge Frequency mode in a PowerFlex® 755TM Common Bus Inverter, the “PIB OT Fault” (14079) may not set properly in the event that an over temperature occurs.

STS Status Indicator Does Not Flash Amber when Product is in Not Ready State

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 5.001

When the PowerFlex® 755T product is in a "not ready" state, the STS status indicator on the human interface module (HIM) does not flash amber yellow, as it should.

‘Rotate Motor ID’ Auto Tune Test Runs Motor to Maximum Programmed Speed

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

When a "Motor ID Test" is run during an autotune, the application may run to the programmed maximum speed.

‘New System’ Alarm Can Appear for Revision 5.002 to 6.002 Firmware Updates

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

When updating your firmware revision from 5.002 to revision v6.002 a "New System" alarm can appear.

Encoder PPR and Encoder Configuration Parameters Reset to Defaults

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

When three-phase AC power is removed and auxiliary 24V DC power only is applied, the encoder configuration parameters can reset to the default values once three-phase AC power is re-applied.

PowerFlex 755TL Drive HIM Power Cycles when set to ‘Process Screen’ Initialize

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

For PowerFlex 755TL drives, if the HIM is set to "process screen" and power is cycled, the drive HIM will continually reboot.

PowerFlex 755T Drives and Bus Supplies can Display a Value of ‘NaN’ in Some Parameters

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

For PowerFlex® 755T drives and PowerFlex 755TM bus supplies, parameters 14:1248 [F0 Cap PctLife] and 14:1250 [F0 Cap RmngLife] can display a value of “NaN”.

DeviceLogix is Not Available as a Selection in Software for PowerFlex 755T Products

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

For PowerFlex® 755T products¸ DeviceLogix is not available as a selection in some fields in Connected Components Workbench™ software and Studio 5000 Logix Designer® software.

Parameter 14:1426 Displays a Value Out of Range for 600V Class PowerFlex 755TL Drive

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

For 600V class PowerFlex® 755TL Drives, parameter 14:1426 [F2 CapVoltageRSS] can display a value that is out-of-range of the default maximum value.

Resetting Port 0 to Factory Default on HIM Resets Purge Frequency Parameters to Default Values

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

Resetting Port 0 parameters to the factory default settings by using the HIM resets the Purge Frequency parameters to the default values.

IPM Speed Estimate Error Fault Occurs During Deceleration at 0.1 Seconds

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

Intermittent “IPMSpdEstEr” faults (F73) can occur when using “IPM FV” mode and a deceleration time of 0.1 seconds.

PowerFlex 755TL and 755TR Drives and PowerFlex 755TM Common Bus Inverters can Issue a "Sec MtrCtrl Chng" Alarm

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

PowerFlex® 755TL and 755TR drives and PowerFlex 755T common bus inverters can experience a "Sec MtrCtrl Chng" (F345) alarm at power up when secondary motor control is enabled.

PowerFlex 755T Product does not Operate After a Stop with Parameter 0:101 Set to Run Level

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

In some instances, when parameter 0:101 [Digital In Cfg] is set to "Run Level" and the drive, bus supply, or common bus inverter is stopped, you may need to toggle the start command to resume or re-start operation.

PowerFlex 755T Human Interface Module Displays “Precharge” when Exiting Energy Pause State

Known Anomaly First Identified as of PowerFlex 755T Firmware Revision 6.002

If you are using the PowerFlex® 755T Energy Pause mode and you manually open the fused disconnect (FD1), the HIM may display a “Precharge” message.

Application Notes Updated for PowerFlex® 755T Firmware Revision 6.002

Before You Begin a Firmware Update

PowerFlex 755T product revision 6.002 and later firmware is provided as a *.dmk file. ControlFLASH™ Plus software is the recommended application for upgrading your firmware when using a *.dmk file. You can use ControlFLASH™ software to upgrade your firmware, with exceptions.

If necessary, download and install the preferred software from the Product Compatibility and Download Center.

Use ControlFLASH Plus to Update PowerFlex 755T Product Firmware

• For instructions on how to install ControlFLASH Plus software, see the ControlFLASH Plus Quick Start Guide, publication CFP-QS001.
• For instructions on how to upgrade your PowerFlex 755T product firmware by using ControlFLASH Plus, see “Use ControlFLASH Plus to update firmware” in the ControlFLASH Plus Quick Start Guide.

Use ControlFLASH to Update PowerFlex 755T Product Firmware

• For instructions on how to install ControlFLASH software, see the ControlFLASH Firmware Upgrade Kit User Manual, publication 1756-UM105.
• For instructions on how to upgrade your PowerFlex 755T product firmware by using ControlFLASH, see Knowledgebase Answer ID BF25100.