User Manual

Siemens Building Technologies VISONIK DCS Functions and System Messages VVS18 CM2U8567E / 04.1999
Landis & Staefa Division Function DPO 2-91
Example of instantaneous Value (Interval = 1 Minute)
TIME: | -1- |
-----------------------------------
16-Feb-90 08:00| 22.8 ( 11) | --> No-Event
08:01| 22.8 ( 11) | --> No-Event
08:02| 22.8 ( 11) | --> No-Event
08:03| 23.0 ( 0) | --> Event
08:04| 23.0 ( 11) | --> No-Event
08:05| 23.0 ( 11) | --> No-Event
08:06| 23.0 ( 11) | --> No-Event
08:07| 23.2 ( 0) | --> Event
If more than one Event occurs within a 1 minute interval only the Validity Marker
associated with the last Event is stored.
Logging Interval of 24 Hours
Unlike intervals of 1.. 60 minutes, no new Validity Marker is calculated for a parameter
value change within a 24 hour interval. The relative Validity Marker is explicitly stored
together with the logged value.
2.11.9.2 Validity Marker for Mean Values
In calculating the Validity Marker for a mean value entry only the following markers are
output in the selected interval (1 or 24 hours):
B7 : HW Trouble
B4 : No Event
B1 : Flag value
B0 : Flag value
If an Event occurs within the selected interval, "NEv" is replaced by "Evt".
For Minimum/Maximum calculation the Validity Marker which is current for the given
time is saved.