24
…5
PROGRAMMING
Fig. 5.1 High Failsafe Alarm without
Hysteresis and Delay
Fig. 5.2 High Failsafe Alarm with
Hysteresis but no Delay
Fig. 5.3 High Failsafe Alarm with
Hysteresis and Delay
Fig. 5.4 High Non–Failsafe Alarm without
Delay and Hysteresis
Fig. 5.5 High Failsafe Alarm with
Delay but no Hysteresis
…5.4
Configure Alarms
Note.
The following examples illustrate
High Alarm Actions
, i.e. the alarm is activated when the process variable exceeds the
defined set point.
Low Alarm Actions
are the same except the alarm is activated when the process variable drops below the
defined set point.
Relay Energized,
LED Off
Relay De-energized, LED On
Process Variable
High Set Point
Relay De-energized,
LED Off
Relay Energized, LED On
Process Variable
High Set Point
Relay Energized,
LED Off
Relay De-energized, LED On
Process Variable
Hysteresis
High Set Point
Relay Energized,
LED Off
Relay De-energized, LED On
Process Variable
High Set Point
Delay
Relay Energized,
LED Off
Relay De-energized, LED On
Process Variable
High Set Point
Delay
Hysteresis