Danfoss VACON NXP Fact sheet

Feature fact sheet

VACON® NXP drive anti-sway functionality

Integrated sensorless control

Anti-sway OFF Anti-sway On

The VACON® NXP drive saves time and
expense with the help of integrated
sensorless control in its anti-sway
functionality.

Cranes are typically used in
manufacturing or maintenance
processes, where productivity and
safety are considered the most
important requirements. Swinging
of loads during crane movement is a
severe problem affecting operation
efficiency. Delays in production can
be greatly reduced if load sway can be
prevented.

Up to

15%

improved
productivity
with anti-sway
functionality

Danfoss’ anti-sway solution provides:

stress on mechanical structures, for
example, trollies, hoists or gantries.

1. Better user experience

Simple commissioning without
complex tuning during commissioning
of the crane. The anti-sway feature
is easy to install with a license key,
and easy to configure and adapt to

3. Increased productivity

Using the anti-sway functionality
enables a 10–15% improvement in
productivity and a high return on

investment.
the crane type and movement with
only 2–3 additional parameters to be
configured in the field.

4. Improved system efficiency

Reduced stress on the complete crane

system reduces costs throughout its

2. Reduced structural stress

Anti-sway functionality increases the

lifetime and improves its operational

efficiency.
lifetime of the crane and reduce the

Feature Benefit

Integrated sensorless control

Independent axis control

Standard VACON® NXP hardware

Only 2–3 parameters to set

No skilled operator required to commission and
operate the crane

No extra hardware required
No encoder or external sensor required to access
anti-sway functionality

No drive-to-drive communication required
between hoist, trolley and travel axes to access
anti-sway functionality

Easy to order
Functionality can be activated by generating the
license during ordering process or upgrading in
the field later using the license key.

Easy to configure
Reduces commissioning time of the crane
Improves productivity

Enhanced user friendliness

drives.danfoss.com

Danfoss anti-sway functionality is
built in to crane application software
for VACON® NXP products. It works
based on trolley and travel motion.
No communication with the hoist
drive is required to operate anti-sway
functionality.

There are two different methods to
eliminate load sway:

1. Maximum rope length

Maximum rope length (in cm), to be
entered in this parameter. Enter the
rope length from drum to hook touch
down to the ground or just above

Actual motor torque behavior when anti-sway functionality is disabled (torque fluctuation
during acceleration/deceleration period) monitored through VACON® NCDrive software tool.

X

10 Swing

T = t/10

2. Average swinging time

 Lower the hook/load to the lowest

practical position

 Run the crane with speed and give

stop command

 Measure the time from 5–10 swings

(back and forth) and calculate the
swinging period

 Enter the swinging period in the

parameter

Actual motor torque behavior when anti-sway functionality is enabled (torque fluctuation
during acceleration/deceleration period) monitored through VACON® NCDrive software tool.

DKDD.PFF.905.A2.02 © Copyright Danfoss Drives | 2019.05