Structured Text; Function Block; Alarm_Analog Structure - Allen-Bradley Logix5000 Reference Manual

Chapter 1 FactoryTalk Alarms and Events Logix-based Instructions (ALMD, ALMA)
ALMA(ALMA, In, ProgAckAll,
ProgDisable, ProgEnable);
Input Parameter Data Type
EnableIn BOOL
In REAL
InFault BOOL
HHEnabled BOOL
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Structured Text

The operands are the same as those for the relay ladder ALMD instruction, with a
few exceptions as indicated above.

Function Block

Operand Type
ALMA tag ALARM_ANALOG

ALARM_ANALOG Structure

Description
Relay Ladder
Corresponds to the rung state. If cleared, the instruction does not execute and outputs are not updated.
Structured Text
No effect. The instruction always executes.
Function Block
If cleared, the instruction does not execute and outputs are not updated.
Default is set.
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.
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).
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.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Format Description
Structure ALMA structure