Fantech VLT 2800 Series Instruction Manual page 48

thus optimum dynamics, accuracy and efficiency.
The V/f-ratio only affects the voltage characteristic if
Constant torque [1] has been selected in parameter
101 Torque characteristic .
Description of choice:
Change the V/f-ratio only if it is not possible to set
the correct motor data in parameters 102-109.
The value programmed in the factory settings
is based on idle operation.
136 Slip compensation
(SLIP COMP.)
Value:
-500 - +500% of rated slip compensation
Function:
Slip compensation is calculated automatically, on
the basis of such data as the rated motor speed
n . In this parameter, the slip compensation can be
M,N
fine-tuned, thereby compensating for tolerances on
the value for n . Slip compensation is only active if
M,N
a selection has been made of Speedregulation, open
loop [0] in parameter 100 Configuration and Constant
torque [1] in parameter 101 Torque characteristic.
Description of choice:
Key in a % value.
137 DC hold voltage
(DC HOLD VOLTAGE)
Value:
0 - 100% of max. DC hold voltage
Function:
This parameter is used to keep the motor
(holding torque) at start/stop.
Description of choice:
This parameter can only be used if a selection has
been made of DC hold in parameter 121 Start
function or 122 Function at stop . To be set as
a percentage value of the max. DC hold voltage,
which depends on the choice of motor.
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.A8.22 - VLT is a registered Danfoss trademark
VLT® 2800 Series
138 Brake cut out value
(BRAKE CUT OUT)
Value:
0.5 - 132.0/1000.0 Hz
Function:
Select the frequency at which the external brake is
released, via the output defined in parameter 323 Relay
output 1-3 or 341 Digital output, terminal 46.
Description of choice:
Set the required frequency.
139 Brake cut in frequency
(BRAKE CUT IN)
Value:
100%
0.5 - 132.0/1000.0 Hz
Function:
Select the frequency at which the external brake
is activated; this takes place via the output
defined in parameter 323 Relay output 1-3 or
341 Digital output terminal 46.
Description of choice:
Set the required frequency.
140 Current, minimum value
(CURRENT MIN VAL)
Value:
0 % of Inom - 100 % of Inom
Function:
This is where the user selects the minimum motor
0%
current running for the mechanical brake to be
released. Current monitoring is only active from stop
until the point when the brake is released.
Description of choice:
This is an extra safety precaution, aimed at
guaranteeing that the load is not lost during start
of a lifting/lowering operation.
3.0 Hz
3.0 Hz
0 %
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