Current Demand; Motoring Current Limit; Regen Current Limit; Symmetrical Current Limit - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
4.04

Current demand

Drive mode Regen
Bit SP
Coding
Range Regen
Update rate 4ms
The current demand is the output of the voltage controller in Menu 3 subject to the current limits.
4.05

Motoring current limit

Drive mode Regen
Bit SP
Coding
Range Regen
Default Regen
Update rate Background
4.06

Regen current limit

Drive mode Regen
Bit SP
Coding
Range Regen
Default Regen
Update rate Background
4.07

Symmetrical current limit

Drive mode Regen
Bit SP
Coding
Range Regen
Default Regen
Update rate Background
Current limits are provided in regen mode, however, if the current limits are active the DC link voltage can no longer be controlled. The motoring
current limit applies with either phase rotation at the input when power is being taken from the supply. Similarly the regen current limit applies with
either phase rotation at the input when power is being fed back into the supply. The symmetrical current limit can override either motoring or
regenerating current limit if it is set at a lower value than either limit.
4.08 Reactive current reference
Drive mode Regen
Coding Bit SP
Range Regen
Default Regen
Update rate 4ms
In regen mode it is possible to produce some current in the x axis of the reference frame so that the Regen drive can be made to produce or consume
reactive power. This parameter defines the level of reactive current as a percentage of the regen mode rated current (Pr 5.07). Positive reactive
current produces a component of current flowing from the supply to the drive at the Regen drive terminals that lags the respective phase voltage, and
negative reactive current produces a component of current that leads the respective voltage. It should be noted that the maximum current in regen
mode is limited to DRIVE_CURRENT_MAX, and so the drive applies a limit to this parameter (REGEN_REACTIVE_MAX) to limit the current
magnitude. Therefore the symmetrical current limit (Pr 4.07) must be reduced below its maximum value before this parameter can be increased from
zero.
Unidrive SP Regen Installation Guide
Issue Number: 2
System Mechanical
design installation
FI DE Txt VM DP ND
1 1 1 1
±TORQUE_PROD_CURRENT_MAX %
FI DE Txt VM DP ND RA
1 1
FI DE Txt VM DP ND RA
1 1
FI DE Txt VM DP ND RA
1 1
FI DE Txt VM DP ND
1 1
±REGEN_REACTIVE_MAX %
0.0
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Electrical Getting
Optimisation
installation started
RA NC NV PT US RW BU
1 1
NC NV PT US RW BU
1 1
0 to MOTOR1_CURRENT_LIMIT_MAX %
175.0
NC NV PT US RW BU
1 1
0 to MOTOR1_CURRENT_LIMIT_MAX %
175.0
NC NV PT US RW BU
1 1
0 to MOTOR1_CURRENT_LIMIT_MAX %
175.0
RA NC NV PT US RW BU
1
Technical
Parameters
data
PS
PS
1 1
PS
1 1
PS
1 1
PS
1
Component
Diagnostics
sizing
103