Menu 4
Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
108
Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
If this parameter is set to one, the drive calculates a torque reference from the motor and load inertia (Pr
3.18
) and the rate of change of speed
reference. The torque reference is added to the speed controller output to provide inertia compensation. This can be used in speed or torque control
applications to produce the torque required to accelerate or decelerate the load inertia.
The current demand filter time constant is defined by this parameter if the speed gain select (Pr
3.16
) is one.
* These are the maximum default values. If the variable maximum of this parameter (TORQUE_PROD_CURRENT_MAX which is defined by
MOTOR1_CURRENT_LIMIT_MAX or MOTOR2_CURRENT_LIMIT_MAX depending on which motor map is active) gives a lower value with the
default value of Motor rated current (Pr
5.07
or Pr
21.07
) default of this parameter is at the lower value.
The maximum for Pr
4.08
and Pr
4.20
is defined by this parameter
Pr
4.26
shows the torque producing current (Pr
4.02
) as a percentage of the active torque producing current, but with an additional adjustment above
base speed so that this parameter shows percentage torque. Below base speed Pr
4.26
is equal to Pr
4.20
. Above base speed the percentage torque
producing current (shown in Pr
4.20
) is adjusted as follows:
Pr
4.26
= Pr
4.20
x rated frequency / frequency
4.22
Inertia compensation enable
Drive modes
Closed-loop vector, Servo
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
Default
Closed-loop vector, Servo
0
Update rate
Background read
4.23
Current demand filter 2
Drive modes
Closed-loop vector, Servo
Coding
Bit
SP
FI
DE Txt VM DP
ND RA NC NV
PT
US RW BU
PS
1
1
1
1
Range
Closed-loop vector, Servo
0.0 to 25.0 ms
Default
Closed-loop vector, Servo
0.0
Update rate
Background read
4.24
User current maximum scaling
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
1
1
1
Range
Open-loop, Closed-loop vector, Servo,
Regen
0.0 to TORQUE_PROD_CURRENT_MAX %
Default
Open-loop,
Closed-loop vector, Servo, Regen
165.0*
175.0*
Update rate
Background read
4.25
Low speed thermal protection mode
Drive modes
Open-loop, Closed-loop, Servo
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
Default
Open-loop, Closed-loop, Servo
0
Update rate
Background read
4.26
Percentage torque
Drive modes
Open-loop
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
1
1
1
Default
Open-loop
±USER_CURRENT_MAX %
Update rate
Background read
Summary of Contents for unidrive sp
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