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The Viltech records the systems parameters and conditions for later use in a set of logs. Each log has a
limit on the number of entries that it can store, so as the log fills-up the oldest entries are replaced by the
most recent ones. The system maintains the following standard logs.
•
Operations Log
•
Trend Log
•
Alarm Log
•
Failure Log
•
User Log
Log screens usually contain more data than the LCD display area can show at one time. In order to view
the entire set of information the operator uses the function keys. For the specific working procedure of
log screens please refer to the log screen section in Chapter 1.
Logging Functions Technical overview
The following sections will discuss the overall function of each of the five standard logs.
Operations Log
The
OPERATIONS LOG
displays a list of the system operating conditions for the last hour at 30-
second intervals and has a limit of 255 recorded data entries. An extra entry is made to the Opera-
tions Log when special events occur, such as alarms, failures or system reset. When an alarm, failure,
or OEM failure occurs a special indicator is also placed next to the logged parameter causing the
problem. Typically the data recorded in this log will be the analog inputs, system state variables and
alarm information.
Chapter 3
Logging Functions
Summary of Contents for Vilter VilTech
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