VLT
®
AutomationDrive EtherNet/IP
MG.90.J1.02 – VLT is a registered Danfoss trademark
46
Check: Link status
The status of the Ethernet link cannot be directly identified by means of the LED’s, if no CIP
connection is established.
Use par. 12-10
Link Status
to verify presents of the link.
Use par. 12-11
Link Duration
to verify that the link is steady present. The parameter will show the
duration of the present link, and preset to 00:00:00:00 if the link is broken.
Check: Cabling
In rare cases of cabling mis-configuration, the option might show the presents of a link, but no
communication is running. Exchange the cable in doubt.
Check: IP address
Verify that the option has a valid IP address (please refer to section:
IP Settings
) in par. 12-01
IP
Address.
If the option has identified a duplicate IP Address NS LED’s will light steady red.
If the option is set up for BOOTP or DHCP, verify that a BOOTP or DHCP server is connected in par.
12-04
DHCP Server.
If no server is connected, the parameter will show: 000.000.000.000.
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:
FC 100/200/300 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.
In CIP, Alarms are divided in to two categories:
- Major Recoverable Faults
- Major Unrecoverable Faults
Please refer to the following sections for a classification of the specific faults.
