User Manual
49
40005E (Enhanced Bargraph Indicator)
REF NO: m42B/om/101
Issue No:02
Table 26 Alarm 1 and Alarm 2 Maintained Alarm Logic
ALARM AL1
MAINTAINED ALARM
(when in abnormal condition ack not pressed)
CONDITION
NORMAL
ABNORMAL
UP (O/S)
DOWN (O/S)
ACK
(2)
NORMAL
(1)
ACK
(3)
HIGH
ALARM
RELAY
OFF
ON
ON
OFF
OFF
OFF
OFF
ASP1
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
LOW
ALARM
RELAY
OFF
ON
OFF
ON
OFF
OFF
OFF
ASP1
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
ALARM AL2
MAINTAINED ALARM
(when in abnormal condition ack not pressed)
CONDITION
NORMAL
ABNORMAL
UP (O/S)
DOWN (O/S)
ACK
(2)
NORMAL
(1)
ACK
(3)
HIGH
ALARM
RELAY
OFF
ON
ON
OFF
OFF
OFF
OFF
ASP2
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
LOW
ALARM
RELAY
OFF
ON
OFF
ON
OFF
OFF
OFF
ASP2
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
ALARM AL3
MAINTAINED ALARM
(when in abnormal condition ack not pressed)
CONDITION
NORMAL
ABNORMAL
UP (O/S)
DOWN (O/S)
ACK
(2)
NORMAL
(1)
ACK
(3)
HIGH
ALARM
RELAY
OFF
ON
ON
OFF
OFF
OFF
OFF
ASP3
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
LOW
ALARM
RELAY
OFF
ON
OFF
ON
OFF
OFF
OFF
ASP3
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
ALARM AL4
MAINTAINED ALARM
(when in abnormal condition ack not pressed)
CONDITION
NORMAL
ABNORMAL
UP (O/S)
DOWN (O/S)
ACK
(2)
NORMAL
(1)
ACK
(3)
HIGH
ALARM
RELAY
OFF
ON
ON
OFF
OFF
OFF
OFF
ASP4
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
LOW
ALARM
RELAY
OFF
ON
OFF
ON
OFF
OFF
OFF
ASP4
TRIP
RELAY
OFF
ON
OFF
OFF
ON
ON
OFF
Notes :
(1)
means normal condition after abnormal has occurred
(2)
means ack pressed in abnormal condition
(3)
means ack pressed in normal condition after abnormal has already occurred.