Danfoss ISD Encoder Box, Operating Instructions Manual, Page: 27 / 44

8 Faults
Encoder box faults are displayed on the 7-segment display
on the encoder box (see chapter
7.1 Operating Display ).
The behaviour of the encoder box is detailed in the
following chapters. Information on troubleshooting can be
found in chapter
8.5 Troubleshooting .
NOTE
If a fault cannot be eliminated by one of the measures
listed, notify Danfoss Service (see chapter
1.5 Service and
Support ).
Have the following information available to enable Danfoss
to help you quickly and effectively:
•
Type number
•
Error message number
•
Firmware version
8.1 Emergency
If an error occurs the encoder box sends an emergency
message. Possible emergencies are listed in chapter
12.3 Emergency Codes .
8.2 Error History
The encoder box keeps an error history with the
emergency codes from chapter
12.3 Emergency Codes along
with a date and timestamp.
The encoder box keeps a maximum of 12 emergencies
divided into 6 errors and 6 warnings. After the history is
filled, the oldest will be replaced. All 12 emergencies can
be read by using SDO.
8.3 Debugging
For debugging purposes the encoder box logs the
following information on the SD card with time and date
information from the real-time clock:
1. Power on
•
Software version information
•
System information CPU frequency
•
CAN settings: baud rate and CAN-ID
2. Events
•
New control code received
•
Unknown control parameter received
3. Encoder interface behaviour: which encoder is
activated
4. Emergencies including power fail emergency
5. Load/save commands
•
The process of write-parameter is
logged: open file, write file.
8.4 Under-Voltage / Power-Failure
Behaviour
The encoder box is able to detect and handle 3 different
voltage level scenarios:
•
Under-voltage during power-up
•
Sudden drop in the supply voltage
•
Power-failure
The encoder box reaction to the different scenarios
ensures predetermined behaviour while ensuring the
integrity of the file and log content.
NOTE
The encoder box is designed to have enough power to
ensure that the parameter and log file are not damaged
during a power failure or voltage drop.
Faults
VLT
®
ISD Encoder Box Operating Instructions
MG75F102 - VLT
®
is a registered Danfoss trademark 25
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