EF-Series Instruction Manual
Rev 2/01 2-5
2.3.2.1 Minute Historical Log
The EF-Series unit has a 60-minute historical log for every history point. The Minute Historical Log
stores the last 60 minutes of data from the current minute. Each history point has Minute Historical
Log entries associated with it.
2.3.2.2 Hourly Historical Log
The EF-Series unit has a total of 840 hourly historical logs available for every history point. The
Hourly Historical Log is also called the Periodic Log. The Hourly Log is recorded every hour at the
top of the hour. The time stamp for periodic logging consists of the month, day, hour, and minute.
2.3.2.3 Daily Historical Log
The EF-Series unit has a total of 35 daily historical logs for every history point. The Daily Log is
recorded at the configured contract hour every day with a time stamp that is the same as the Hourly
Log. Each history point has daily historical log entries.
2.3.2.4 Alarm Log
The Alarm Log contains the change in the state of any signal that has been enabled for alarms. The
system Alarm Log has the capacity to maintain and store up to 240 alarms in a “circular” log (where
the oldest log is in effect overwritten by the newest). The alarm log has information fields which
include time and date stamp, alarm clear or set indicator, and either the tag of the point which was
alarmed along with its current value or a 14 ASCII character description.
In addition to providing functionality for appending new alarms to the log, it allows host packages to
request the index of the most recently logged alarm entry. Alarm logging is available internally to the
system and to external host packages. Alarm Logs are not stored to the flash ROM during the
ROCLINK Save Configuration function.
The Alarm Log operates in a circular fashion with new entries overwriting the oldest entry when the
buffer is full. The alarm log provides an audit history trail of past operation and changes. The Alarm
Log is stored separately to prevent recurring alarms from overwriting configuration audit data.
2.3.2.5 Event Log
The event log contains changes to any parameter within the EF-Series unit made through the native
protocol. This event log also contains other EF-Series unit events such as power cycles, cold starts,
and disk configuration downloads.
The system event log has the capacity to maintain and store up to 240 events in a circular log. The
event log has information fields which include point type, parameter number, time and date stamp,
point number if applicable, the operator identification, and either the previous and current parameter
values or a 14-byte detail string in ASCII format.
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