Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 55
FactoryTalk Alarms and Events Logix-based Instructions (ALMD, ALMA) Chapter 1
Analog Alarm (ALMA)
The ALMA instruction detects alarms based on the level or rate of change of an
analog value. Program (Prog) and operator (Oper) control parameters provide an
interface for alarm commands.
Operands:
Relay Ladder
Operand Type Format Description
ALMA tag ALARM_ANALOG Structure ALMA structure.
In REAL
DINT
INT
SINT
Tag
Immediate
Value is copied to In when instruction executes. The alarm input
value, which is compared with alarm limits to detect the alarm
conditions.
ProgAckAll BOOL Tag
Immediate
Value is copied to ProgAckAll when instruction executes. On
transition from cleared to set, acknowledges all alarm conditions that
require acknowledgement.
ProgDisable BOOL Tag
Immediate
Value is copied to ProgDisable when instruction executes. When set,
disables alarm (does not override Enable Commands).
ProgEnable BOOL Tag
Immediate
Value is copied to ProgEnable when instruction executes. When set,
enables alarm (takes precedence over Disable commands).
HHlimit REAL Immediate Relay ladder only.
High High alarm limit.
HLimit REAL Immediate Relay ladder only.
High alarm limit.
LLimit REAL Immediate Relay ladder only.
Low alarm limit.
LLLimit REAL Immediate Relay ladder only.
Low Low alarm limit.
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