Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menu 5
Unidrive SP Advanced User Guide
123
Issue Number: 10 www.controltechniques.com
This parameter defines the action taken on enable as follows:
0: nonE
No action.
1: Ph Enl
A minimal movement phasing test is performed each time the drive is enabled (i.e. changes from the inhibit state to either the stop or run state). The
test can be used to determine the phasing angle for an absolute or non-absolute type encoder. If the test is completed successfully the drive changes
to the stop or run state as appropriate. The phasing angle parameter is updated to the correct value, but it is not saved to EEPROM or the SMART
card.
2: Ph Init
A minimal movement phasing test is performed the first time the drive is enabled after power-up. The test will only be performed again on enable if the
position feedback device(s) have been re-initialized. Re-initialization occurs for example after a trip specifically related to an encoder where position
information may have been lost. Initialization occurs when parameter 03.48 changes from zero to one. The phasing angle parameter is updated to the
correct value, but it is not saved to EEPROM or the SMART card.
The voltage boost is used in fixed boost mode and square law mode for Open-loop mode, and during the rotating auto-tune test in Closed-loop vector
mode.In open-loop mode the default is dependant on the frame size as given in the table below.
The motor rated full load rpm parameter (Pr
5.08
) in conjunction with the motor rated frequency parameter (Pr
5.06
) defines the full load slip of the
motor. The slip is used in the motor model for closed-loop vector control. The full load slip of the motor varies with rotor resistance which can vary
significantly with motor temperature. When this parameter is set to 1 or 2 the drive can automatically sense if the value of slip defined by Pr
5.06
and
Pr
5.08
has been set incorrectly or has varied with motor temperature. If the value is incorrect Pr
5.08
is automatically adjusted. Pr
5.08
is not saved
at power-down, and so when the drive is powered-down and up again it will return to the last value saved by the user. If the new value is required at
the next power-up it must be saved by the user. Automatic optimization is only enabled when the frequency is above rated frequency/8, and when the
load on the motor load rises above
5
/
8
rated load. Optimization is disabled again if the load falls below half rated load. For best optimization results the
correct values of stator resistance (Pr
5.17
), transient inductance (Pr
5.24
), stator inductance (Pr
5.25
) and saturation breakpoints (Pr
5.29
and Pr
5.30
) should be stored in the relevant parameters. Rated rpm auto-tune is not available if the drive is not using external position/speed feedback
(RFC mode).
The gain of the optimizer, and hence the speed with which it converges, can be set at a normal low level when Pr
5.16
is set to 1. If this parameter is
set to 2 the gain is increased by a factor of 16 to give faster convergence.
The rated rpm optimizer is automatically disabled when closed-loop vector RFC mode is selected (Pr
3.24
=1 or 3).
5.14
Action on enable
Drive modes
Servo
Coding
Bit
SP
FI
DE
TE VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
1
Range
Servo
0 to 2
Default
Servo
0
Update rate
Background read
5.15
Low frequency voltage boost
Drive modes
Open-loop, Closed-loop vector
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU PS
1
1
1
1
Range
Open-loop, Closed-loop vector
0.0 to 25.0 % of motor rated voltage
Default
Open-loop, Closed-loop vector
See below
Update rate
Background read
Drive sizes
Default
SP0xxx,SP1xxx, SP2xxx, SP3xxx
3.0%
SP4xxx, SP5xxx
2.0%
SP6xxx to SP9xxx, SPMxxxxx
1.0%
5.16
Rated rpm auto-tune
Drive modes
Closed-loop vector
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
Range
Closed-loop vector
0 to 2
Default
Closed-loop vector
0
Update rate
Background read
Содержание unidrive sp
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