Emerson Daniel 3415

6 Directory
6.1 Archive logs
The Daniel 3410 Series Gas Ultrasonic Flow Meters provides five types of data logs (daily,
hourly, audit, alarm, and system logs).
Each log type is discussed in detail below followed by Daniel MeterLink instructions to read
(and optionally save) meter log records ().
6.1.1 Daily and Hourly log data points actions
Five different log data point actions are supported by the daily and hourly logs: snapshot,
average, flow-gated (average), totalize, and macro as described below:
• SNAPSHOT: causes the data point's value at the log time to be recorded.
• AVERAGE: causes the data point's average value over the log interval (day or hour) to
be recorded.
• FLOW-GATED: causes the data point's flow-gated average value over the log interval
(day or hour) to be recorded. A point's flow-gated average is the average of its values
when the flow is above the low-flow cut-off. If the flow does not exceed the cut-off
during the interval, then the data point's flow-gated average is the same as its
regular (non-flow- gated) average.
• TOTALIZE: causes the data point's accumulated value over the log interval (day or
hour) to be recorded.
• MACRO: causes the (boolean) data point's 'latched' value over the log interval (day
or hour) to be recorded. A (boolean) data point's latched value indicates if the point
was ever TRUE during the log interval (where a TRUE value is represented by a 1 and
a FALSE value is represented by a 0). This allows a group of boolean data points to be
grouped into a single integer value where each bit represents the latched value of a
single boolean data point.
Daily log
The Daniel 3410 Series Gas Ultrasonic Flow Meter stores a daily log record once per day at
the specified contract hour. (Refer to the Daniel MeterLink
™
Help files for information on
specifying the ContractHour data point.)
The meter can store up to 365 daily records. The user can select whether old, unread
records can be overwritten by new records when the log becomes full via the data point
DoOverwriteUnreadDailyLog. This point can be modified using the Daniel MeterLink
Tools|Edit/Compare Configuration screen. The default is to overwrite old, unread records.
Refer to for information on reading records and marking records as read. The data point
IsDailyLogFull indicates whether or not the daily log is full and cannot overwrite old,
unread records.
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Operations manual 81