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o A "babbling log" is one that is saving records faster than the meter can handle long term.
Onset of babbling occurs when a log fills a flash sector in less than an hour. For as long
as babbling persists, a summary of records discarded is logged every 60 minutes. Normal
logging resumes when there have been no new append attempts for 30 seconds.
o Logging of diagnostic records may be suppressed via a bit in programmable settings.
2. Alarm Record:
Byte
0
1
2
Value
timestamp
Size: 10 bytes (16 bytes image)
Data: The Alarm record data is 4 bytes, and specifies which limit the event occurred on, and the
direction of the event (going out of limit, or coming back into limit).
Direction: The direction of the alarm event: whether this record indicates the limit going
out, or coming back into limit.
Bit
Value
type
Limit Type: Each limit (1-8) has both an above condition and a below condition. Limit
Type indicates which of those the record represents.
Limit ID: The specific limit this record represents. A value in the range 0-7, Limit ID
represents Limits 1-8. The specific details for this limit are stored in the programmable
settings.
Value: Depends on the Direction:
Byte
0
Value
Interpretation of Alarm Data:
To interpret the data from the alarm records, you need the limit data from the Programmable
Settings [0x754B, 40 registers].
There are 8 limits, each with an Above Setpoint, and a Below Setpoint. Each setpoint also
has a threshold (hysteresis), which is the value at which the limit returns "into" limit after the
setpoint has been exceeded. This prevents "babbling" limits, which can be caused by the
limit value fluttering over the setpoint, causing it to go in and out of limit continuously.
E
Electro Industries/Gauge Tech
3
4
5
6
direction
1
2
0
1
2
0
1
If the record is "Going out of limit," this is the value of the limit when the
o
"Out" condition occurred
o If the record is "Coming back into limit," this is the "worst" value of the
limit during the period of being "out": for High (above) limits, this is the
highest value during the "out" period; for Low (below) limits, this is the
lowest value during the "out" period.
1
2
Identifier
Above Setpoint
7
8
9
limit#
Value %
Going out of limit
Coming back into limit
3
4
5
Limit ID
High Limit
Low Limit
3
4
5
Above Hyst.
Doc# E149701
6
7
6
7
8
Below Setpoint
9
Below Hyst.
B-20
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