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6.4.4 Alarm 2 menu
As above for Alarm 1 menu.
Note: The parameters 'Acknowledge', 'Active', 'Inactive', 'N(ot) Acknowledged' and,
'Acknowledgement' can all be 'wired' to other parameters, so, for example, a relay can be
made to operate whilst the alarm is inactive or whilst it is active or on acknowledgement etc.
by wiring the relevant parameter to the relay's 'PV' input. See Section 10 for details of user
wiring.
6.4.5 Alarm types
The following figures attempt to show graphically the meanings of the alarm parameters which can be set for
the various alarm types available.
ABSOLUTE ALARMS
Absolute high alarm definitions
Threshold
Hysteresis
Input signal
Hysteresis: 0
Hysteresis: 0
Hysteresis: yes
Hysteresis: yes
September 18
FEC920: USER GUIDE
Symbol
Dwell: 0
Dwell: D
Dwell: 0
Dwell:D
= Alarm active
Figure 71 Absolute alarm parameters
Absolute low alarm definitions
Input signal
Hysteresis
Threshold
Hysteresis: 0
Dwell: 0
Hysteresis: 0
Dwell: D
Hysteresis: yes
Dwell: 0
Hysteresis: yes
Dwell:D
A5E45696052A Rev-AA
Symbol
= Alarm active
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