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212 Parameters
47
47 Voltage ctrl
Overvoltage and undervoltage control settings. See also
section
on page
.
47.01
Overvolt ctrl
Enables the overvoltage control of the intermediate DC link.
Fast braking of a high inertia load causes the voltage to rise
to the overvoltage control limit. To prevent the DC voltage
from exceeding the limit, the overvoltage controller
automatically decreases the braking torque.
Note:
If a brake chopper and resistor or a regenerative supply
section are included in the drive, the controller must be
disabled.
Disable
Overvoltage control disabled.
0
Enable
Overvoltage control enabled.
1
47.02
Undervolt ctrl
Enables the undervoltage control of the intermediate DC link.
If the DC voltage drops due to input power cut off, the
undervoltage controller will automatically decrease the motor
torque in order to keep the voltage above the lower limit. By
decreasing the motor torque, the inertia of the load will cause
regeneration back to the drive, keeping the DC link charged
and preventing an undervoltage trip until the motor coasts to
stop. This will act as a power-loss ride-through functionality in
systems with high inertia, such as a centrifuge or a fan.
Disable
Undervoltage control disabled.
0
Enable
Undervoltage control enabled.
1
47.03
SupplyVoltAutoId
Enables the auto-identification of the supply voltage.
Disable
Auto-identification of supply voltage disabled.
0
Enable
Auto-identification of supply voltage enabled.
1
47.04
Supply voltage
Defines the nominal supply voltage. Used if auto-identification
of the supply voltage is not enabled by parameter
0 … 1000 V
Nominal supply voltage.
10 = 1 V
48
48 Brake chopper
Control of the brake chopper.
48.01
Bc enable
Enables the brake chopper control.
Note:
Before enabling the brake chopper control, ensure that
a brake resistor is connected and the overvoltage control is
switched off (parameter
Disable
Brake chopper control disabled.
0
EnableTherm
Brake chopper control enabled with resistor overload
protection.
1
Enable
Brake chopper control enabled without resistor overload
protection. This setting can be used, for example, if the
resistor is equipped with a thermal circuit breaker that is wired
to stop the drive if the resistor overheats.
2
No.
Name/Value
Description
FbEq
Содержание ACS850-04 series
Страница 1: ...ACS850 Firmware Manual ACS850 Standard Control Program...
Страница 4: ......
Страница 10: ...10 Table of contents...
Страница 52: ...52 The ACS850 control panel...
Страница 56: ...56 Control locations and operating modes...
Страница 80: ...80 Program features...
Страница 236: ...236 Parameters...
Страница 286: ...286 Fieldbus control...
Страница 294: ...294 Control block diagrams...