Actual signals and parameters
187
27 BRAKE CHOPPER
Control of the brake chopper.
27.01
BRAKE CHOPPER
CTL
Activates the brake chopper control.
OFF
Inactive
0
ON
Active.
Note:
Ensure the brake chopper and resistor are installed and the
overvoltage control is switched off (parameter
65535
27.02
BR OVERLOAD
FUNC
Activates the overload protection of the brake resistor. The user-adjustable
variables are parameters
and
.
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 for brake
chopper protection.
0.00 … 100.00 ohm
Resistance value
0 … 100
27.04
BR THERM T CONST Defines the thermal time constant of the brake resistor. The value is used in the
overload protection. See parameter
With the SACE brake resistors, the parameter setting must be 200 s.
With the SAFUR brake resistors, the parameter setting must be 555 s.
0.000 … 10000.000 s Time constant
1 = 1
27.05
MAX CONT BR
POWER
Defines the maximum continuous braking power which will raise the resistor
temperature to the maximum allowed value. The value is used in the overload
protection. See parameter
.
0.00 …10000 kW
Power
1 = 1
27.06
BC CTRL MODE
Selects the control mode of the braking chopper.
AS GENERATOR
Chopper operation is allowed when the DC voltage exceeds the braking limit,
the inverter bridge modulates and the motor generates power to the drive.
The selection prevents the operation in case the intermediate circuit DC
voltage rises due to abnormally high supply voltage level. Long time supply
voltage rise would damage the chopper.
0
COMMON DC
Chopper operation is allowed always when the DC voltage exceeds the
braking limit. The selection is to be used in applications where several
inverters are connected to the same intermediate circuit (DC bus).
WARNING!
Excessive supply voltage will raise the intermediate circuit
voltage above the operation limit of the chopper. If the voltage remains
abnormally high for a long period, the braking chopper will be
overloaded and damaged.
65535
30 FAULT FUNCTIONS
Programmable protection functions
30.01
AI<MIN FUNCTION
Selects how the drive reacts when an analogue input signal falls below the set
minimum limit.
Note:
The analogue input minimum setting must be set to 0.5 V (1 mA) or
above (see parameter group
FAULT
The drive trips on a fault and the motor coasts to stop.
1
NO
Inactive
2
30.02
PANEL LOSS
Selects how the drive reacts to a control panel communication break.
FAULT
Drive trips on a fault and the motor stops as defined with parameter
1
NO
Inactive
2
Index
Name/Selection
Description
FbEq
Summary of Contents for ACS 800 Series
Page 1: ...ACS800 Firmware Manual Crane Control Program N697 ...
Page 4: ......
Page 26: ...Start up and control through the I O interface 26 ...
Page 36: ...Quick start up guide 36 ...
Page 52: ...Control panel 52 ...
Page 105: ...Program features 105 Figure Control diagram for Shaft synchronisation executed in 20 ms ...
Page 128: ...Program features 128 ...
Page 150: ...Application macros control location EXT1 EXT2 150 ...
Page 228: ...Actual signals and parameters 228 ...
Page 299: ...Adaptive Programming examples for crane control 299 ...
Page 305: ...Adaptive Programming examples for crane control 305 ...
Page 318: ...Analogue Extension Module 318 ...
Page 332: ...Additional data actual signals and parameters 332 ...
Page 334: ...DriveWindow 334 ...
Page 335: ...Control block diagrams 335 Control block diagrams ...
Page 336: ...Control block diagrams 336 ...
Page 337: ...Control block diagrams 337 ...
Page 338: ...Control block diagrams 338 ...
Page 340: ...www abb com drives www abb com drivespartners Contact us 3AFE68775230 Rev E EN 2012 09 25 ...