Measurement Channels and Alarms
3-27
IM 04L42B01-01E
3
ISA-A
Sequencediagram
Process
Sequence
Display
Relay output
Alarm icon
Normal
Normal
Normal
Deactivated
No display
Process
Sequence
Display
Relay output
Deactivated
Process
Sequence
Display
Relay output
Alarm icon
Activated
Abnormal
Acknowledged
On
Flashing
Alarm
Abnormal or
normal
To abnormal
Return to normal
Alarm ACK
while abnormal
Alarm ACK
while normal
Sequencepattern
Alarm
Display
Relay output
Alarm ACK
• If an alarm is released before the alarm ACK operation is performed, the annunciator blinks with the color that is displayed
when no alarms are activated.
• If an alarm is released before the alarm ACK operation is performed, the alarm icon blinks green.
Whenmultiplealarmshavebeenassignedtoasingleannunciatorwindow
• If multiple alarms are occurring, the window is displayed using the color of the alarm with the highest priority.
Whentwoalarmshavebeenassignedtoasinglerelay
WhentherelayissettoORlogic
ACK ACK
Relay hold
Alarm A
Occurrence
Alarm B
Occurrence
Release
Release
Relay
Activated
Deactivated
An alarm has occurred so the relay has been activated.
3.12UsingtheAlarmAnnunciatorFunction(Releasenumber3orlater)