Danfoss VLT 380-500 V Design Manual page 24

Product Features
5.4.8 Low Current Warning
This function is similar to low-frequency warning (see
chapter 5.4.6 Low-frequency Warning), except a low current
setting is used to issue a warning and turn off external
equipment. The function is not active when stopped or at
start up until the set operating current has been reached.
5.4.9 No Load/Broken Belt Warning
This feature can be used for monitoring a V-belt. After a
5 5
low current limit has been stored in the frequency
converter, if loss of the load is detected, the frequency
converter can be programmed to issue an alarm and trip
or to continue operation and issue a warning.
5.4.10 Lost Serial Interface
The frequency converter can detect loss of serial communi-
cation. A time delay of up to 18000 s is selectable to avoid
a response due to interruptions on the serial communi-
cations bus. When the delay is exceeded, available options
can:
•
Maintain the last speed.
•
Go to maximum speed.
•
Go to a preset speed.
•
Stop and issue a warning.
22
®
VLT Parallel Drive Modules
Danfoss A/S © 6/2016 All rights reserved. MG37N102