Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
Menu 4
Unidrive SP Advanced User Guide
107
Issue Number: 10 www.controltechniques.com
The thermal protection system can be used in regen mode to protect the input inductors. The rated current (Pr
5.07
) should be set to the rated current
for the inductors.
The thermal model temperature accumulator is reset to zero at power-up and accumulates the temperature of the motor while the drive remains
powered-up. Each time Pr
11.45
is changed to select a new motor, or the rated current defined by Pr
5.07
or Pr
21.07
(depending on the motor
selected) is altered, the accumulator is reset to zero.
The drive reactive current is shown in this parameter for all modes.
The current limit applied at any time depends on whether the drive is motoring or regenerating and also on the level of the symmetrical current limit.
Pr
4.18
gives the limit level that applies at any instant.
See Pr
Open-loop, Closed-loop vector, Servo
This parameter displays the actual torque producing current (Pr
4.02
) as a percentage of rated active current. Positive values indicate motoring and
negative values indicate regenerating.
Regen
This parameter displays the active current (Pr
4.02
) as a percentage of the rated current (Pr
5.07
or Pr
21.07
). Positive values indicate power flow
from the supply and negative values indicate power into the supply
4.17
Reactive current
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
2
1
1
1
Range
Open-loop, Closed-loop vector, Servo,
Regen
±DRIVE_CURRENT_MAX A
Update rate
4ms write
4.18
Overriding current limit
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 to TORQUE_PROD_CURRENT_MAX %
Update rate
Background write
4.19
Overload accumulator
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
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 100.0 %
Update rate
Background write
4.20
Percentage load
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
±USER_CURRENT_MAX %
Update rate
Background write
Summary of Contents for unidrive sp
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