Siemens 270 series Instruções de Operação Página 120

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Runtime functionalities of a project
8.4 Logs
TP 270, OP 270, MP 270B (WinCC flexible)
8-4 Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
Memory options
Depending on the configuration, the logs are written to a file or stored in a database
configured for this.
Logging to a CSV file
The project engineer must have specified a folder path for storing the CSV file containing
your logged data. This references the storage location.
CSV format table columns are separated by separators; the table rows are terminated by
a line break character. This allows you to evaluate or edit your log data using an external
text editor or spreadsheet program.
Logging to a database
By storing your log files in a database, you can utilize the full database functionality for
further processing and analysis of the logged data.
Databases tested and released for WinCC flexible:
MS Data Engine 97 and MS Data Engine 2000
MS Access 97 and MS Access 2000
MS SQL Server 7.0 and MS SQL Server 2000
Logging methods used in WinCC flexible Runtime:
Circular log
Segmented circular log
Log with level-dependent system alarm
Log file with data volume-based system alarm
Alarm logs
Project alarms indicate fault states and operating states of a process. They are generally
triggered by the controller. Alarms can be output to the HMI device in the form of images.
WinCC flexible allows you to log alarms and document operational and error states within a
plant.
The following data are logged to the file:
Date and time of alarm
Alarm number
Alarm tags (up to 8)
Alarm status
Alarm text (optional)
Fault location (optional)
All alarms are assigned to a specific alarm class. All alarm classes can be logged.
Alarms can be logged either automatically or by operator intervention.
The contents of log files can be output to the HMI device if a corresponding alarm view has
been configured.
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