Danfoss VLT Programming Manual Download

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14-22 Operation Mode

Option:

Function:

Up's

15-04 Over Temp's

and

15-05 Over Volt's

. The

frequency converter will reset during the next
power-up.

14-22 Operation Mode

will also revert to the

default setting

Normal operation

[0].

[3] Boot

mode

14-23 Typecode Setting

Option: Function:

Typecode re-writing. Use this parameter to set the
typecode matching the specific FC.

14-25 Trip Delay at Torque Limit

Range:

Function:

60 s

[0 - 60
s]

Enter the torque limit trip delay in seconds. When
the output torque reaches the torque limits
(

4-16 Torque Limit Motor Mode

and

4-17 Torque

Limit Generator Mode

), a warning is triggered.

When the torque limit warning has been contin-
uously present for the period specified in this
parameter, the frequency converter trips. Disable
the trip delay by setting the parameter to 60 s =
OFF. Thermal frequency converter monitoring will
still remain active.

14-26 Trip Delay at Inverter Fault

Range:

Function:

Size related

[0 - 35 s] When the frequency converter detects

an over-voltage in the set time trip will
be effected after the set time.

14-28 Production Settings

Option:

Function:

[0]

No action

[1]

Service reset

[2]

Set Production Mode

14-29 Service Code

Range:

Function:

[-2147483647 - 2147483647 ]

Service use only.

3.14.4 14-3* Current Limit Control

The frequency converter features an integral Current Limit
Controller which is activated when the motor current, and
thus the torque, is higher than the torque limits set in

4-16 Torque Limit Motor Mode

and

4-17 Torque Limit Generator

Mode

When the current limit is reached during motor operation or
regenerative operation, the frequency converter will try to
reduce torque below the preset torque limits as quickly as
possible without losing control of the motor.

While the current control is active, the frequency converter
can only be stopped by setting a digital input to

Coast

inverse

[2] or

Coast and reset inv.

[3]. Any signal on terminals

18 to 33 will not be active until the frequency converter is no
longer near the current limit.
By using a digital input set to

Coast inverse

[2] or

Coast and

reset inv.

[3], the motor does not use the ramp down time,

since the frequency converter is coasted.

14-30 Current Lim Ctrl, Proportional Gain

Range:

Function:

100 %

[0 - 500 %] Enter the proportional gain value for the

current limit controller. Selection of a high
value makes the controller react faster. Too
high a setting leads to controller instability.

14-31 Current Lim Ctrl, Integration Time

Range:

Function:

0.020 s

[0.002 - 2.000
s]

Controls the current limit control
integration time. Setting it to a lower
value makes it react faster. A setting too
low leads to control instability.

14-32 Current Lim Ctrl, Filter Time

Range:

Function:

26.0 ms

[1.0 - 100.0 ms]

3.14.5 14-4*Energy Optimising

Parameters for adjusting the energy optimisation level in
both Variable Torque (VT) and Automatic Energy Optimi-
zation (AEO) mode.

Automatic Energy Optimization is only active if

1-03 Torque

Characteristics

, is set for either

Auto Energy Optim. Compressor

[2] or

Auto Energy Optim. VT

[3].

14-40 VT Level

Range:

Function:

66 %

[40 - 90
%]

Enter the level of motor magnetisation at low
speed. Selection of a low value reduces energy
loss in the motor, but also reduces load
capability.
This parameter cannot be adjusted while the
motor is running.

14-41 AEO Minimum Magnetisation

Range:

Function:

Size related

[40 - 75
%]

Enter the minimum allowable magneti-
sation for AEO. Selection of a low value
reduces energy loss in the motor, but
can also reduce resistance to sudden
load changes.

Parameter Description

VLT

HVAC Drive Programming Guide

106

MG.11.CB.02 - VLT

is a registered Danfoss trademark