19(19)
Device total operation time in hours.
Communication fail rate 24h avg
This parameter monitors the fieldbus communication failure
rate in per cent. The value is a moving average of last 24
hours.
In ideal circumstances the value should remain zero. The
bigger the value, the worse the fieldbus signal is.
The decreasing of the fieldbus signal quality may result
from bad segment design (trunk and spur lengths, termina-
tion, shielding, grounding), loose connections or electro-
magnetic disturbances (EMC).
Nbr of comm errs during last min
This parameter indicates the number of detected fieldbus
communication errors during last one minute. The value of
this parameter resets to zero every 1 min. Note that this
parameter is available since software revision 1.30.
3.3.4 Event Log
ND9000P stores 8000 latest events and associated time
stamps to the device memory.
The event log selector page is presented in figure 25 and
sample event page is presented in figure 26.
Total operation time
Device total operation time in hours, current value. As an
event occurs, this time is used as a time stamp.
Event log selector
This parameter is used to select the events that are dis-
played in the pages
Events1
and
Events2
. Options are;
•
Show 25 latest events
•
Show next 25 events
•
Show previous 25 events
Event log status
Displays the status of the trend selection procedure.
Figure 25. Event log selector.
Figure 26. Page Events1.
