Alarms
5-14
SIMATIC PCS 7 OSx 4.1.2 Operator
5.5
System Alarms
provides a list of system alarms and describes the conditions that
cause them. Note that a system alarm has the same name as the system tag
with which it is associated. Alarms for system tags are annunciated only on
the station where the alarm condition occurred.
Table 5-4
System Alarms
Alarm/System Tag Name
Alarm Conditions
_ACTREQ
Issued by the online alarm handling processes, for example, when errors occur on
process initialization.
_ALARMING
Issued by the online alarm handling processes, for example, when the alarm icon
form is removed by a non-alarming process.
_ARCHIVING
Issued by the data archiving processes, for example, because of auto archive
failure, or disk full or nearly full.
_BATCH
Issued by the batch management process, for example, when commands cannot be
sent to batches or units, or a BCL program abnormally exits.
_CHANGE_LOG
Currently not used.
_CONFIG
Currently not used.
_DATA_BASE
Issued by the database subsystem, for example, when backup database is restored
after a failed tag capacity change or database corruption.
_DATA_XFR
Issued by the remote data transfer processes, for example, for local or remote
database errors.
_DIAGNOSTICS
Currently not used.
_FO_CIRCUIT
Issued by the redundancy subsystem when a failover circuit is not connected.
_GENERAL
Issued to indicate problems of a general nature, for example, problems with
handling keyboard input, or loss of communications with graphical editor.
_H1_COMM
Issued by the communications subsystem, for example, if controller offline,
controller not responding, network connection down.
_HT_COLLECT
Issued by historical trend collection processes, for example, for collection falling
behind schedule.
_HT_DISPLAY
Currently not used.
_HT_UPDATE
Issued by the historical trend manual update process, for example, when unable
to open input file, invalid data, unconfigured trend points, disk is nearly full.
_LIBRARIAN
Issued by the librarian process, for example, for rcp failure, directory removal
failure.
Table continued on next page.
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