Rockwell Automation Publication 750-PM001N-EN-P - February 2017 113
Drive Port 0 Parameters Chapter 3
SPEED CONTROL
Speed Reference
591 Spd Ref Sel Sts
Speed Reference Select Status
RO 32-bit
Integer
Displays the operating status of the speed referencing section of the drive. Individual bits are provided to represent the following conditions:
Bit 0 “Ref A Auto” – When set, the Reference A Auto path is active.
Control Logic has selected the Speed Reference source A. The exact origin of this speed reference is determined by the parameter specified in P545 [Spd Ref A Sel].
This parameter should also be reported in P930 [Speed Ref Source].
Bit 1 “Ref B Auto” – When set, the Reference B Auto path is active.
Control Logic has selected the Speed Reference source B. The exact origin of this speed reference is determined by the value specified in P550 [Spd Ref B Sel]. This
parameter should also be reported in P930 [Speed Ref Source].
Bit 2 “Ref A Mult” – When set, speed reference A is being modified by P549 [Spd Ref A Mult]. When clear, either the multiplier is 1 or is not affecting the speed
reference because the Ref A Auto path is inactive.
Bit 3 “Ref B Mult” – When set, the speed reference B is being modified by P554 [Spd Ref B Mult]. When clear, either the multiplier is 1 or is not affecting the speed
reference because the “Ref B Auto” path is inactive.
Bit 4 “MicroPsnMult” – When set, P592 [Selected Spd Ref] is being multiplied by P1112 [MicroPsnScalePct].
Bit 5 “Trim Pct Ref” – When set, the speed reference is summed with a portion of the reference that results from multiplying the reference by the value of the
parameter indicated in P616 [SpdTrimPrcRefSrc].
Bit 6 “Trim Ref” – When set, the speed reference is being offset by the value of the parameter indicated in P617 [Spd Trim Source].
Bit 7 “Preset Auto” – When set, Control Logic has selected a preset auto speed reference. The P930 [Speed Ref Source] parameter will indicate the source of this
reference.
Bit 8 “Manual” – When set, the speed reference selection is in one of the Manual positions due to P879 [Drive Logic Rslt] Bit 6 “Manual” being set. When P879, Bit
6 is clear, the speed reference selection is in one of the Auto positions. The result of the Auto/Manual speed reference selection can be seen in P592 [Selected Spd
Ref].
Bit 9 “Sel Override” – The Selected Speed Reference parameter has been overridden by another reference. Refer to P930 [Speed Ref Source] for the cause of the
override.
Bit 10 “Bipolar Ref” – When set, P308 [Direction Mode] = 1 “Bipolar.” When in bipolar mode, the sign of the speed reference value will determine the direction of
motor rotation.
Bit 11 “Rev Disable” – When set, P308 [Direction Mode] = 2 “Rev Disable.” When in reverse disable mode, negative speed reference values are rejected and a zero
speed value is used in their place.
Bit 12 “Unipolar Ref” – When set, P308 [Direction Mode] = 0 “Unipolar.” When in unipolar mode, the sign of the speed reference value (and therefore direction of
motor rotation) is determined by P879 [Drive Logic Rslt] Bit 4 “Forward” and Bit 5 “Reverse.”
Bit 13 “Decel Lmt Sw” – When set, the Torque Proving function’s control logic has detected a decel limit switch active and has selected P571 [Preset Speed 1] for the
speed reference value.
Bit 14 “End Lim Sw” – When set, the Torque Proving function’s control logic has detected an end limit switch active and has selected zero speed for the speed
reference value.
Bit 15 “Skip Band” – When set, the Skip Band function has modified P2 [Commanded SpdRef]. When clear, the Skip Band function has not changed P2
[Commanded SpdRef].
File
Group
No. Display Name
Full Name
Description
Values
Read-Write
Data Type
Options
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Skip Band
End Lmt Sw
Decel Lmt Sw
Unipolar Ref
Rev Disable
Bipolar Ref
Sel Override
Manual
Preset Auto
Trim Ref
Trim Pct Ref
MicroPsnMult
Ref B Mult
Ref A Mult
Ref B Auto
Ref A Auto
Default00000000000000000000000000000000
Bit 313029282726252423222120191817161514131211109876543210
0 = False
1 = True
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