ABB REF 54 Series Technical Reference Manual page 72

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72
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Technical Reference Manual, General
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Alarm channel 4 MMIALARM4
Alarm channel 5 MMIALARM5
Alarm channel 6 MMIALARM6
Alarm channel 7 MMIALARM7
Alarm channel 8 MMIALARM8
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In a non-latched mode, the ON signal switches between ON and OFF state texts and
the corresponding LED colors. Alarm acknowledgement (ACK) clears the last time
stamp line of the alarm view, but leaves the corresponding alarm LED state
unchanged. An event is generated on the rising and falling edge of the ON signal and
by acknowledgement.
Non-latched, steady (example 1)
ON
ACK
ALARM
Off text On text
Off colour for steady LED 09-24 12:40:00
On colour for steady LED
Non-latched, steady (example 1 continues)
ON
ACK
ALARM
On text
On colour for steady LED
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Latched, steady alarms can be acknowledged only when the ON signal is inactive.
The time stamp of the first alarm is recorded. Successful acknowledgement clears
the time stamp line of the alarm view and the corresponding alarm LED. An event
is generated on the rising and falling edge of the ON signal and by
acknowledgement.
On text
09-24 12:40:00
On colour for steady LED
Off text
09-24 12:40:00
Off colour for steady LED
Off text
09-24 12:40:00
Off colour for steady LED
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On text
On colour for steady LED
alarind4
Off text
Off colour for steady LED
alarind5