Allen-Bradley Logix5000 Reference Manual page 62

Chapter 1 FactoryTalk Alarms and Events Logix-based Instructions (ALMD, ALMA)
Output Parameter Data Type
ROCPosInAlarmCount DINT
ROCNegInAlarmTime LINT
ROCNegAlarmCount DINT
AckTime LINT
RetToNormalTime LINT
AlarmCountResetTime LINT
DeliveryER BOOL
DeliveryDN BOOL
DeliveryEN BOOL
NoSubscriber BOOL
NoConnection BOOL
CommError BOOL
AlarmBuffered BOOL
Subscribers DINT
SubscNotified DINT
Status DINT
InstructFault (Status.0) BOOL
InFaulted (Status.1) BOOL
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Description
The number of times the positive rate-of-change condition has been activated. If the maximum value
is reached, the counter leaves the value at the maximum count value.
Timestamp when the ALMA instruction detected that the In value exceeded the negative rate-of-
change condition limit for the most recent transition to the active state.
The number of times the negative rate-of-change condition has been activated. If the maximum value
is reached, the counter leaves the value at the maximum count value.
Timestamp of most recent condition acknowledgement. If the alarm does not require
acknowledgement, this timestamp is equal to most recent condition alarm time.
Timestamp of alarm returning to a normal state.
Timestamp indicating when the alarm count was reset.
Delivery error of the alarm notification message. Set when there is a delivery error, either no alarm
subscriber was subscribed or at least one subscriber did not receive the latest alarm change state
message. Cleared when delivery is successful or is in progress.
Delivery completion of the alarm notification message. Set when delivery is successful, at least one
subscriber was subscribed and all subscribers received the latest alarm change state message
successfully. Cleared when delivery does not complete successfully or is in progress.
Delivery status of the alarm notification message. Set when delivery is in progress. Cleared when
delivery is not in progress.
Alarm had no subscribers when attempting to deliver the most recent message. Set when there are
no subscribers. Cleared when there is at least one subscriber.
Alarm's subscribers were not connected when attempting to deliver the most recent message. Set
when all subscribers are disconnected. Cleared when at least one subscriber is connected or there
are no subscribers.
Communication error when delivering an alarm message. Set when there are communication errors
and all retries are used. This means that a subscriber was subscribed and it had a connection, but the
controller did not receive confirmation of message delivery. Cleared when all connected subscribers
confirm receipt of the alarm message.
Alarm message buffered due to a communication error (CommError is set) or a lost connection
(NoConnection is set). Set when the alarm message is buffered for at least one subscriber. Cleared
when the alarm message is not buffered.
Number of subscribers for this alarm.
Number of subscribers successfully notified about the most recent alarm state change.
Combined status indicators:
Status.0 = InstructFault.
Status.1 = InFaulted.
Status.2 = SeverityInv.
Status.3 = AlarmLimitsInv.
Status.4 = DeadbandInv.
Status.5 = ROCPosLimitInv.
Status.6 = ROCNegLimitInv.
Status.7 = ROCPeriodInv.
Instruction error conditions exist. This is not a minor or major controller error. Check the remaining
status bits to determine what occurred.
User program has set InFault to indicate bad quality input data. Alarm continues to evaluate In for
alarm conditions.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011