Safety
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parameters
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the motor
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Affinity User Guide
113
Issue Number: 5 www.controltechniques.com
Open-loop
This is the speed at which the motor would rotate when supplied with its
base frequency at rated voltage, under rated load conditions (=
synchronous speed - slip speed). Entering the correct value into this
parameter allows the drive to increase the output frequency as a
function of load in order to compensate for this speed drop.
Slip compensation is disabled if Pr
0.45
is set to 0 or to synchronous
speed, or if Pr
5.27
is set to 0.
If slip compensation is required this parameter should be set to the value
from the rating plate of the motor, which should give the correct rpm for a
hot machine. Sometimes it will be necessary to adjust this when the
drive is commissioned because the nameplate value may be inaccurate.
Slip compensation will operate correctly both below base speed and
within the field weakening region. Slip compensation is normally used to
correct for the motor speed to prevent speed variation with load. The
rated load rpm can be set higher than synchronous speed to deliberately
introduce speed droop. This can be useful to aid load sharing with
mechanically coupled motors.
RFC
Rated load rpm is used with motor rated frequency to determine the full
load slip of the motor which is used by the vector control algorithm.
Incorrect setting of this parameter can result in the following:
•
Reduced efficiency of motor operation
•
Reduction of maximum torque available from the motor
•
Failure to reach maximum speed
•
Over-current trips
•
Reduced transient performance
•
Inaccurate control of absolute torque in torque control modes
The nameplate value is normally the value for a hot machine, however,
some adjustment may be required when the drive is commissioned if the
nameplate value is inaccurate.
Enter the name-plate value for the motor rated current.
Open-loop & RFC
Enter the value from the rating plate of the motor.
6.2.20 Operating-mode selection
The settings for Pr
0.48
are as follows:
This parameter defines the drive operating mode. Pr
xx.00
must be set
to 1253 (European defaults) or 1254 (USA defaults) before this
parameter can be changed. When the drive is reset to implement any
change in this parameter, the default settings of all parameters will be
set according to the drive operating mode selected and saved in
memory.
6.2.21 Status information
This parameter controls access via the drive keypad as follows:
The keypad can adjust this parameter even when user security is set.
The parameter displays the software version of the drive.
Pr
0.51
changes the logic polarity for digital inputs and digital outputs,
but not the enable input, the relay output or the 24V output.
0.45 {5.08}
Motor rated full load speed (rpm)
RW
Uni
US
OL
Ú
0 to 180,000 rpm
Ö
EUR> 1,500
USA> 1,800
RFC
Ú
0.00 to 40,000.00 rpm
Ö
EUR> 1,450.00
USA> 1,770.00
0.46 {5.07}
Motor rated current
RW
Uni
RA
US
Ú
0 to RATED_CURRENT_MAX A
Ö
RATED_CURRENT_MAX
0.47 {5.06}
Rated frequency
RW
Uni
US
OL
Ú
0 to 3,000.0Hz
Ö
EUR> 50.0, USA> 60.0
RFC
Ú
0 to 1,250.0Hz
Ö
EUR> 50.0, USA> 60.0
0.48 {11.31}
Operating mode selector
RW
Txt
NC
PT
Ú
1 to 2
Ö
OL
1
RFC
2
Setting
Operating mode
OPEn LP
1
Open-loop
rfc
2
RFC
0.49 {11.44}
Security status
RW
Txt
PT
US
Ú
0 to 2
Ö
0
Value
String
Action
0
L1
Only menu 0 can be accessed
1
L2
All menus can be accessed
2
Loc
Lock user security when drive is reset.
(This parameter is set to L1 after reset.)
0.50 {11.29}
Software version number
RO
Uni
NC
PT
Ú
1.00 to 99.99
Ö
0.51 {8.29}
Positive logic select
RW
Bit
PT
US
Ú
OFF (0) or On (1)
Ö
On (1)
Pr 0.51 = 0
(negative logic)
Pr 0.51 = 1
(positive logic)
Inputs
<5V = 1
>15V = 0
<5V = 0
>15V = 1
Non-relay
outputs
On (1) = <5V
OFF (0) = >15V
OFF (0) = <5V
On (1) = >15V
Relay outputs
OFF (0) = open
On (1) = closed
OFF (0) = open
On (1) = closed
24V output
(T22)
OFF (0) = 0V
On (1) = 24V
OFF (0) = 0V
On (1) = 24V
Summary of Contents for Affinity
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