3.15.4 15-2* Historic Log
View up to 50 logged data items via the array parameters in this parameter group. For all parameters in the group, [0] is the most recent data and [49]
the oldest data. Data is logged every time an
event
occurs (not to be confused with SLC events).
Events
in this context are defined as a change in one
of the following areas:
1. Digital input
2. Digital outputs (not monitored in this SW release)
3. Warning word
4. Alarm word
5. Status word
6. Control word
7. Extended status word
Events
are logged with value, and time stamp in msec. The time interval between two events depends on how often
events
occur (maximum once every
scan time). Data logging is continuous but if an alarm occurs, the log is saved and the values can be viewed on the display. This feature is useful, for
example when carrying out service following a trip. View the historic log contained in this parameter via the serial communication port or via the display.
15-20 Historic Log: Event
Array [50]
Range: Function:
0 N/A* [0 - 255 N/A] View the event type of the logged events.
15-21 Historic Log: Value
Array [50]
Range: Function:
0 N/A* [0 - 2147483647 N/A] View the value of the logged event. Interpret the event values according to this table:
Digtal input Decimal value. See par. 16-60
Digital Input
for description
after converting to binary value.
Digital output (not monitored in
this SW release)
Decimal value. See par. 16-66
Digital Output [bin]
for de-
scription after converting to binary value.
Warning word Decimal value. See par. 16-92
Warning Word
for descrip-
tion.
Alarm word Decimal value. See par. 16-90
Alarm Word
for description.
Status word Decimal value. See par. 16-03
Status Word
for description
after converting to binary value.
Control word Decimal value. See par. 16-00
Control Word
for description.
Extended status word Decimal value. See par. 16-94
Ext. Status Word
for de-
scription.
15-22 Historic Log: Time
Array [50]
Range: Function:
0 ms* [0 - 2147483647 ms] View the time at which the logged event occurred. Time is measured in ms since frequency converter
start. The max. value corresponds to approx. 24 days which means that the count will restart at
zero after this time period.
15-23 Historic Log: Date and Time
Range: Function:
Application
dependent*
[Application dependant] Array parameter; Date & Time 0 - 49: This parameter shows at which time the logged event oc-
curred.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark
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