Technical data

5.2.2 System log records
The Daniel 3810 Series Liquid Ultrasonic Flow Meter logs all system messages in the
system log. The meter can store up to 3000 system records. The user can select whether
old, unread records can be overwritten by new records when the log becomes full via the
data point DoOverwriteUnreadSystemLog. This point can be modified using the Daniel
MeterLink Tools|Edit/Compare Configuration screen. The default is to overwrite old, unread
records. Refer to Section 5.2.5 for information on reading records and marking records as
read. The data point IsSystemLogFull indicates whether or not the system log is full and
cannot overwrite old, unread records.
Repetitive system messages are prevented from filling up the system log. When a
particular system message occurs 3 times within 60 seconds, that system message is
suppressed until that message’s frequency drops below the 3 times-per-60 sec rate. The
system log records indicate when a system message suppression is started and ended.
5.2.3 Reading log records
Daniel 3810 Series Liquid Ultrasonic Flow Meter log records are read using the Daniel
MeterLink Logs/Reports|Meter Archive Logs screen. The are three log groups:
• daily
• hourly
• event (audit, alarm, and system logs)
Select the desired log group(s) via the Collect daily log/Collect hourly log/Collect event log
check boxes. If the event group is selected, the audit, alarm, and system logs are
individually selectable. Whenever any log is collected, the current meter configuration is
also collected.
Archive logs and reports
84 Daniel 3810 Series Operations Manual