Actual signals and parameters
90
26 FLUX CONTROL
Flux control variables. Improves the stability of a system by
decreasing the amount of electrical motor flux when low torque
requirements are present.
26.01 FLUX OPTIMIZATION Activates/deactivates the flux optimization function. See Flux
Optimization on page 35.
NO Inactive. 0
YES Active. 65535
26.02 FLUX BRAKING Activates/deactivates the flux braking function. See Flux Braking on
page 34.
NO Inactive. 0
YES Active. 65535
26.06 FLUX REF/MAX Maximum flux reference. Used if 26.07 ACTIVE FLUX CTRL is NO or
if the required motor torque is > 30%.
0.0…100.0% Setting range. 10 = 1%
26.07 ACTIVE FLUX CTRL Activates/deactivates the active flux control.
NO Motor flux percentage equals 26.06 FLUX REF/MAX. 0
YES Motor flux percentage comes from the active program control. 66535
26.08 FLUX REF 2 Motor flux percentage active while no run signal is present or when the
required motor torque is >10% and <30%.
30.0…100.0% Setting range. 10 = 1%
26.09 FLUX MIN Motor flux percentage active while required motor torque is <10%.
0.0…100.0% Setting range. 10 = 1%
26.10 FLUX RAMP RATE The time it takes for the flux to ramp from 26.09 FLUX MIN to 26.06
FLUX REF/MAX when 26.07 ACTIVE FLUX CTRL is set to YES.
0.0…100.0 s Setting range. 10 = 1 s
27 BRAKE CHOPPER
Control of the brake chopper.
27.01 BRAKE CHOPPER CTL Activates the brake chopper control.
Note: If an external chopper (e.g. NBRA-xxx) is used, parameter must
be disabled.
OFF Inactive. 0
ON Active.
Note: Ensure the brake chopper and resistor are installed and the
overvoltage control is switched off (20.05 OVERVOLTAGE CTRL).
65536
27.02 BR OVERLOAD FUNC Activates the overload protection of the brake resistor. The user-
adjustable variables are 27.03 BR RESISTANCE, 27.04 BR THERM
TCONST and 27.05 MAX CONT BR POWER.
NO Inactive. 0
WARNING Active. If the drive detects an overload, it generates a warning. 1
FAULT Active. If the drive detects an overload, it trips on a fault. 2
27.03 BR RESISTANCE Defines the resistance value of the brake resistor. The value is used in
the overload protection. See 27.02 BR OVERLOAD FUNC.
0.01…100.00 Ohm Resistance value. 1 = 1 Ohm
27.04 BR THERM TCONST Defines the thermal time constant of the brake resistor. The value is
used in the overload protection. See 27.02 BR OVERLOAD FUNC.
0.001…10000.000 s Time Constant. 1 = 1 s
No. Name/Value Description FbEq
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