Rockwell Automation Publication 20D-RN047A-EN-P - October 2019
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HIM Downloads Cause Incorrect Values in Some Parameters
A HIM download can cause parameters 81 [Spd Reg P Gain] and 82 [Spd Reg I
Gain] to set to the wrong values. This occurs if parameter 90 [Spd Reg BW] is set
to a value of zero. If [Spd Reg BW] is set to a non-zero value than parameters 81
and 82 are set correctly. This same situation occurs with parameters 30 [Min Spd
Ref Lim] and 31 [Max Spd Ref Lim] and 532 [Maximum Freq]. In the case of
parameter 90 the default could be set to zero. Generally, a change to the default
value requires a major revision change. This will also affect customers that are
expecting the default value of parameter 90 to be 10. The speed limit issue is
more complex since no single value of parameter 532 will establish the proper
speed limits values and could set parameters 30 and 31 too high.
Random Instantaneous Overcurrent (IOC) Trips
The direction bit may prevent nuisance IOC trips. If the drive is running and
experiences random IOC trips, the direction bit can be set to a zero to possibly
eliminate this issue.
Restrictions
The following restrictions apply to this revision of firmware:
Firmware Compatibility
PowerFlex firmware revision 30.001 can only be used with Series A control
boards. If you attempt to download a firmware revision that is not compatible
with the control board on the drive, a series of error messages appear. If these
error messages appear, confirm the revision of the control board, and select a
firmware revision download that is compatible with the control board version.
Clearing the “Find Home” Bit in Parameter 741 [Position Status]
If bit 24 “Find Home” in parameter 740 [Position Control] is set, bit 15
“Homed” in parameter 741 [Position Status] remains set until a start command is
issued.
