Troubleshooting; Alarm Word And Warning Word - Danfoss VLT AutomationDrive Manual

®
VLT AutomationDrive EtherNet/IP

Troubleshooting

Alarm Word and Warning Word

Alarm word and warning word are shown in the display in Hex format. If there is more than one
warning or alarm, a sum of all warnings or alarms will be shown. Warning word and alarm word are
displayed in par. 16-90 to 16-95.
For more information on the individual alarms and warnings, please refer to: FC300 Design Guide
N.B.
Please note that the availability of the individual alarms and warnings are dependent on the drive
type: FC100/200/300 series.
Warning and Alarm Messages
There is a clear distinction between alarms and warnings. In the event of an alarm, the frequency
converter will enter a fault condition. After the cause for the alarm has been cleared, the master must
acknowledge the alarm message in order to start operation of the frequency converter again. A
warning, on the other hand, may appear when a warning condition arises, then disappear when
conditions return to normal without interfering with the process.
Warnings
All warnings within the frequency converter are represented by a single bit within a warning word. A
warning word is always an action parameter. Bit status FALSE [0] means no warning, while bit status
TRUE [1] means warning. Each bit status has a corresponding text string message. In addition to the
warning word message the master will also be notified via a change in the status word.
Alarms
Following an alarm message the frequency converter will enter a fault condition. Only after the fault
has been rectified and the master has acknowledged the alarm message by a bit in the Control Word,
can the VLT resume operation. All alarms within the VLT are represented by a single bit within an
alarm word. An alarm word is always an action parameter. Bit status FALSE [0] means no alarm, while
bit status TRUE [1] means alarm.
MG.90.Jx.02 ver. 5
th
September 2007 – VLT is a registered Danfoss trademark
45