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EXCEL 50/100/500/600/800 ATTRIBUTES
EN2B-0092GE51 R0512
15
digital input
CARE interpretation
(control table)
1 0 0 1
display at operator interface
(status text)
OFF/
trouble:
alarm
OFF/
trouble:
alarm
ON/
operating
RTN*
ON/
operating
RTN*
* RTN = Return To Normal
Alarm Delay
Delaying alarm outputs The alarm delay time (in seconds) is entered in the attribute "Alarm Delay". The
alarm delay time determines how long an alarm condition must exist before an
alarm is generated. Entering an alarm delay time of 10 seconds means that the limit
value must be exceeded for at least 10 seconds before this datapoint generates an
alarm. If the limit value lasts for only 7 second, then no alarm occurs.
Alarm Suppression
The attribute “Suppress Alarm” establishes whether or not alarm messages from
the following alarm attributes should be suppressed:
• Operational status
• Min/Max. limit
• Maintenance alarm
• Interval counter
• Alarm Status
The following entries are possible:
• Off Alarms not suppressed
• On Alarms suppressed
Digital input example In addition to a variety of other attributes, a digital input also has the "Operating
Mode", "Alarm Status", and "Maintenance Alarm" attributes. If alarm suppression is
activated for this datapoint, then no message is displayed during an operating mode
change-over, or when changing into the alarm condition, or when reaching the
maintenance alarm.
Suppression of system The controller will not issue a system alarm when the alarm’s system alarm text
alarms (V2.04.xx or higher) starts with an @ character.
Alarm Status (prior to V2.04.x)
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 when the digital
point changes from the active state to the passive state (alarm reached). An
additional message is generated (alarm going) when the digital point returns to the
active state
(see Fig. 6. Alarm status messaging)
Alarm
reached
Alarm
ending