Alarm saving¶
For each alarm group a file can be defined, in which the alarm events are stored, if (!) a ‘Save’ action has been assigned to the class in the Alarm classes dialog.
Select the alarm group in the configuration tree and open the dialog tab ‘Alarm saving’:
The following definitions are possible:
- Filepath: Directories path of the file which is defined in Filename; via button “…” you get the standard dialog for selecting a directory. If the target-specific option Target Settings in Category Visualization is activated, this path will be ignored an the file will be saved in the download directory of the PLC.
- Filename: Name of the file which should save the alarm events (e.g. “alarmlog”). Automatically a file will be created which gets the name defined here plus an attached digit and which has the extension “.alm”. The digit indicates the version of the log-file. The first file gets a “0”; each further file, which will be created according to the defined File change event, will be numbered with 1, 2 etc. (Examples: “alarmlog0.alm”, “alarmlog1.alm).
- File change event: Define here the event which will cause the creation of a new file for alarm-saving. Possible entries: Never, after one Hour, after one Day, after one Week, after one Month, at a rising edge of the variable defined in field Triggervariable, when the number of records in the file as defined in Number of records gets exceeded.
- Triggervariable resp. Number of records: see above, File change event.
- Delete old files after .. Hours: Number of days since the day of creation, after which all alarm log-files except from the actual one should be deleted.
The log-file (History) contains the following entries:
See the column types and exemplary entries for two alarms.
| Date/Time in DWORD | Date | Time | Event | Expression | Alarm type | Limit | Tolerance | Current value | Class | Priority | Message |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1046963332 | 6.3.03 | 16:08:52 | INTO | PLC_PRG.b | LO | -30 | 5 | -31 | Alarm_high | 0 | Temperature ! |
| 1046963333 | 6.3.03 | 16:08:53 | ACK | PLC_PRG.n | HIHI | 35 | Warnng | 9 | Rising Temp. ! |
Example appearance of the log-file
1046963332,6.3.03 16:08:52,INTO,PLC_PRG.ivar5,HIHI,,,, 9.00,a_class2,0,
1046963333,6.3.03 16:08:53,INTO,PLC_PRG.ivar4,ROC,2,,, 6.00,a_class2,2,
1046963333,6.3.03 16:08:53,INTO,PLC_PRG.ivar3,DEV-,,,, -6.00,a_class2,5,
1046963334,6.3.03 16:08:54,INTO,PLC_PRG.ivar2,LOLO,-35,,3, -47.00,warning,10,warning: low temperature !
1046963334,6.3.03 16:08:54,INTO,PLC_PRG.ivar1,HI,20,,5, 47.00,a_class1,2,temperature to high ! Acknowledge !