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ATTRIBUTES EXCEL 50/100/500/600/800
EN2B-0092GE51 R0512 16
Fig. 6. Alarm status messaging
NOTE: The active state and passive state are defined in the "Active State"
datapoint attribute.
Alarm Status (V2.04.xx or higher)
Alarm monitoring In the case of a digital input or a pseudo digital point, the attribute "Alarm Status"
specifies whether or not alarm monitoring is required.
The following entries are possible:
• Yes: Alarm monitoring is required
• No: Alarm monitoring is not required
When alarm monitoring is required, the alarm message occurs depending on the
physical contact status and on the logical status as defined in the online attribute
“Normally Open/Normally Closed”.
Alarm Type
The attributes listed in Table 5 are capable not only of generating alarms, but also
of writing them to the internal alarm memory and sending them to the PC front-end
or to the modem module (when connected).
Table 5. Alarm attributes
attribute always critical optional critical or non-critical
Operating Mode
X
Min. Limit
X
Max. Limit X
Maintenance
Alarm
X
Interval Counter
X
Alarm Status
X
Changing over the attribute "Operating Mode" always results in a critical alarm, but
the attribute "Alarm Type" offers a choice for the alarm attributes "Min. Limit", "Max.
Limit", "Maintenance Alarm", "Totalizer", and "Alarm Status" whether an alarm is
classified as critical or non-critical. Distinguishing between critical and non-critical
alarms is significant for the subsequent reporting of the alarms to the PC front-end
or to the modem module. Compared to non-critical alarms, critical alarms are given
priority on the bus when several alarms are in the alarm queue. When the type of
alarm for a datapoint has been decided, e.g. "critical" alarm type, it refers to all
alarm attributes for this datapoint.
Alarm Definition
DI in
“Active State”
DI in
“Passive State”