ABB ECA06 - Page 134

3.6 Setting the Configuration Chapter 3: Configuration
134 493-0736-11 (6-2)
Table 92 Absolute Alarm Outputs.
Note: The Absolute Alarm block is freely configurable.
Deviation Alarm Block
The Deviation Alarm block handles relative alarms. The block observes the
difference between the Signal1 and Signal2 input values:
Diff = Signal2 – Signal1
The parameters NegDeviationLimit and PosDeviationLimit define the alarm
limits. For each alarm limit there is a corresponding alarm output – NegAlarm and
PosAlarm. The Alarm output is active if any alarm output is active. When Diff is
between NegDeviationLimit and PosDeviationLimit no output is active. If Diff
decreases and reaches NegDeviationLimit the corresponding NegAlarm output is
activated. If Diff increases and reaches PosDeviationLimit the corresponding
PosAlarm output is activated. The deviation alarms may be summarized:
Outputs
Name Type
LoLo Alarm Digital
Lo Alarm Digital
Hi Alarm Digital
HiHiAlarm Digital
Alarm Digital
Available in
ECA06 ECA60 ECA600 EMA60
-123
Signal1
Signal2
Deviation
Alarm
NegAlarm
PosAlarm
Alarm