56 Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Chapter 1 FactoryTalk Alarms and Events Logix-based Instructions (ALMD, ALMA)
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The operands are the same as those for the relay ladder ALMD instruction, with a
few exceptions as indicated above.
Function Block
ALARM_ANALOG Structure
Operand Type Format Description
ALMA tag ALARM_ANALOG Structure ALMA structure
ALMA(ALMA, In, ProgAckAll,
ProgDisable, ProgEnable);
Input Parameter Data Type Description
EnableIn BOOL Relay Ladder
Corresponds to the rung state. If cleared, the instruction does not execute and outputs are not updated.
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No effect. The instruction always executes.
Function Block
If cleared, the instruction does not execute and outputs are not updated.
Default is set.
In REAL The alarm input value, which is compared with alarm limits to detect alarm conditions.
Default = 0.0.
Relay Ladder
Copied from the instruction operand.
Structured Text
Copied from instruction operand.
InFault BOOL Bad health indicator for the input. The user application may set InFault to indicate the input signal has an
error. When set, the instruction sets InFaulted (Status.1). When cleared, the instruction clears InFaulted
(Status.1). In either case, the instruction continues to evaluate In for alarm conditions.
Default is cleared (good health).
HHEnabled BOOL High High alarm condition detection. Set to enable detection of the High High alarm condition. Clear to
disable detection of the High High alarm condition.
Default is set.
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