EXCEL 50 MMI - USER GUIDE
43 EN2B-0222GE51 R0216
Point in Alarm
All data-points currently in an alarm condition, i.e. the alarm limit for an analog
point or the alarm state for a digital point has been reached, can be displayed on
the Excel 50 MMI. When selecting this option, the data-point's name and
associated alarm text will be displayed.
Critical / Non-Critical Alarms
The following attributes can generate alarms and will write them into the alarm
buffer as well as sending them to the PC central via the C-Bus.
Alarm Attributes
With the "Min Limit", "Max Limit", "Totalizer", and "Alarm State" attributes, you can
classify alarms as either critical or non-critical.
NOTE: The "Operating Mode" attribute always generates a critical alarm.
System Alarms Description
Operating malfunctions arising within a controller (e.g. power failure) or during
communication with another Excel 5000 device are displayed on the Excel 50
MMI.
NOTE: System alarms are always critical alarms.
Min. / Max. Limit Monitoring
Two maximum limits ("Max Lim1" and "Max Lim2") and two minimum limits
("Min Lim1" and "Min Lim2") can be independently set for physical and pseudo
analog inputs.
The limit values can be changed using the operator sequence. Each time a limit
value is reached, irrespective of direction, an alarm is generated.
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