Maximum Drive Encoder Reference; Drive Encoder Reference Scaling; Drive Encoder Reference; Drive Encoder Reference Destination - Emerson unidrive sp User Manual

Parameter Keypad and Parameter
structure display x.00
In closed-loop vector mode, if Pr 3.24 is set to 1 or 3 so that the drive is operating without position feedback, this parameter also defines a filter on the
output of the speed estimator which is used as the speed feedback. A filter with a 4ms time constant is always present on the output of the speed
estimator, but this filter may be extended as follows: 0 = 4ms, 1 = 8ms, 2 = 16ms, 3 = 32ms, 4 = 64ms, 5 = 128ms. The output of the speed estimator
can include some ripple, which increases as the drive passes into field weakening and the filter can be used to remove this ripple. This is particularly
useful when using standard ramp or spinning start with a low friction high inertia load, and can prevent over voltage trips when the drive has no
braking resistor.

Maximum drive encoder reference

3.43
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
Range Open-loop, Closed-loop vector, Servo
Open-loop, Closed-loop vector
Default
Servo
Update rate Background read

Drive encoder reference scaling

3.44
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
Range Open-loop, Closed-loop vector, Servo
Default Open-loop, Closed-loop vector, Servo
Update rate Background read

Drive encoder reference

3.45
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
Range Open-loop, Closed-loop vector, Servo
Update rate 4ms write

Drive encoder reference destination

3.46
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
Range Open-loop, Closed-loop vector, Servo
Default Open-loop, Closed-loop vector, Servo
Update rate Read on reset
The drive encoder input can be used as a reference to control a drive parameter. The drive encoder reference parameter (Pr 3.45) gives the speed of
the encoder input as a percentage of the maximum drive encoder reference provided that the number of encoder lines per revolution (Pr 3.34) has
been set up correctly. This may then be scaled and routed to any non-protected drive parameter.
3.47 Re-initialise position feedback
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
1
Update rate Background read
3.48 Position feedback initialised
Drive modes Open-loop, Closed-loop vector, Servo
Bit SP
Coding
1
Update rate Background write
Unidrive SP Advanced User Guide
Issue Number: 10
Parameter Advanced parameter
description format descriptions
FI DE Txt VM DP ND
0 to 40,000 rpm
1,500
3,000
FI DE Txt VM DP ND
3
0.000 to 4.000
1.000
FI DE Txt VM DP ND
1 1
±100.0%
FI DE Txt VM DP ND
1 2
Pr 0.00 to Pr 21.50
Pr 0.00
FI DE Txt VM DP ND
FI DE Txt VM DP ND
1
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Serial comms
Macros
protocol
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1 1
RA NC NV PT US RW BU
1 1
RA NC NV PT US RW BU
1 1
Electronic
Performance RFC mode
nameplate
PS
1
PS
1
PS
PS
1
PS
PS
Menu 3
All modes
77