Danfoss VLT Series Programming Manual page 117

Parameter Description
15-14 Samples Before Trigger
Range:
50 [0 - 100 ] Enter the percentage of all samples prior to a
*
3 3
3.15.3 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:
0 [0 - 255 ]
*
15-21 Historic Log: Value
Array [50]
Range:
0 [0 -
*
2147483647 ]
116
VLT
Function:
trigger event which are to be retained in the
log. See also 15-12 Trigger Event and
15-13 Logging Mode.
Function:
View the event type of the logged events.
Function:
View the value of the logged event.
Interpret the event values according to
this table:
MG.11.CC.02 - VLT
®
HVAC Drive Programming Guide
15-21 Historic Log: Value
Array [50]
Range:
15-22 Historic Log: Time
Array [50]
Range:
0 ms [0 - 2147483647
*
ms]
15-23 Historic Log: Date and Time
Range:
Size related
*
®
is a registered Danfoss trademark
Function:
Digtal input Decimal value. See
16-60 Digital Input for
description after
converting to binary
value.
Digital output Decimal value. See
(not 16-66 Digital Output [bin]
monitored in for description after
this SW converting to binary
release) value.
Warning word Decimal value. See
16-92 Warning Word for
description.
Alarm word Decimal value. See
16-90 Alarm Word for
description.
Status word Decimal value. See
16-03 Status Word for
description after
converting to binary
value.
Control word Decimal value. See
16-00 Control Word for
description.
Extended Decimal value. See
status word 16-94 Ext. Status Word for
description.
Function:
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.
Function:
[ 0 - 0 ]