Danfoss VLT HVAC Series, Руководство по программированию, Страница: 171 / 338

[61] Logic rule 5
15-13 Logging Mode
Option: Function:
[0] * Log always Select Log always [0] for continuous logging.
[1] Log once on trigger Select
Log once on trigger
[1] to conditionally start and stop logging using par.15-12
Trigger
Event
and par.15-14
Samples Before Trigger
.
15-14 Samples Before Trigger
Range: Function:
50 N/A* [0 - 100 N/A] Enter the percentage of all samples prior to a trigger event which are to be retained in the log. See
also par.15-12
Trigger Event and par.15-13 Logging Mode .
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.
VLT ® HVAC Drive Programming Guide 3 Parameter Description
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
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