Emerson unidrive sp User Manual

Parameter
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Parameter
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Performance RFC mode
Menu 3
Closed-loop
Unidrive SP Advanced User Guide 59
Issue Number: 10 www.controltechniques.com
The speed error is the difference between the final speed demand and the speed feedback in rpm. This does not include the effect of the D term in the
speed controller feedback branch.
The output of the speed regulator is a torque demand given as a percentage of rated motor torque. This is then modified to account for changes in
motor flux if field weakening is active, and then used as the torque producing current reference.
If the speed feedback (Pr 3.02) is at or below the level defined by this parameter in either direction the Zero speed flag (Pr 10.03) is 1, otherwise the
flag is 0.
"At speed" flag (Pr 10.06) is set if the speed feedback (Pr 3.02) is on the boundaries or within the at speed window. Flags Pr 10.07 and Pr 10.05 are
set if the reference is above or below the window respectively.
If Pr 3.09 = 0 reference window mode is used and the "at speed" condition is true if
(|Pr 1.03| - Pr 3.06) ≤ |Pr 3.02| ≤ (|Pr 1.03| + Pr 3.07)
(If the lower limit is less than zero then zero is used as the lower limit).
If Pr 3.09 = 1 absolute window mode is used and the "at speed" condition is true if
Pr 3.06 ≤ |Pr 3.02| ≤ Pr 3.07
3.03 Speed error
Drive modes Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 11111
Range Closed-loop vector, Servo ±SPEED_MAX rpm
Update rate 4ms write
3.04 Speed controller output
Drive modes Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 11111
Range Closed-loop vector, Servo ±TORQUE_PROD_CURRENT_MAX %
Update rate 4ms write
3.05 Zero speed threshold
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range Closed-loop vector, Servo 0 to 200 rpm
Default Closed-loop vector, Servo 5
Update rate Background read
3.06 At speed lower limit
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range Closed-loop vector, Servo 0 to 40,000 rpm
Default Closed-loop vector, Servo 5
Update rate Background read
3.07 At speed upper limit
Drive modes Open-loop, Closed-loop vector, Servo
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Range Closed-loop vector, Servo 0 to 40,000 rpm
Default Closed-loop vector, Servo 5
Update rate Background read

Emerson unidrive sp Specifications

General

Brand	Emerson
Model	unidrive sp
Category	Controller
Language	English