Logix5000 Controllers General Instructions - SLAC Confluence

50 Analog Alarm Instruction (ALMA)Structure Definition ForALARM_ANALOG TagThe tag structure, ALARM_ANALOG, which corresponds to the ALMAtag, is common to all languages, except where noted.Input ParametersInput Parameter Data Type DescriptionEnableIn BOOL System-defined input.Ladder Logic: Corresponds to the rung state. If cleared, the instruction does not execute andoutputs are not updated.Structured Text: Does not affect processing.Function Block: Enable input. If cleared, the instruction does not execute and outputs are notupdated.Default is set.In REAL The alarm input value, which is compared with alarm limits to detect the alarm condition.Ladder Logic: copied from instruction operand.Structured Text: copied from instruction operand.Default is 0.0.InFault BOOL Input bad health indicator. If In is read from an analog input, then InFault is normally controlledby the analog input fault status. When InFault is set, it indicates the input signal has an error.Default is cleared = good health.HHEnabled BOOL Specifies whether a high-high alarm condition detection is enabled. Set - Condition detectionenabled. Cleared - Condition detection disabled.Default is set.HEnabled BOOL Specifies whether a high alarm condition detection is enabled. Set - Condition detectionenabled. Cleared - Condition detection disabled.Default is set.LEnabled BOOL Specifies whether a low alarm condition detection is enabled. Set - Condition detectionenabled. Cleared - Condition detection disabled.Default is set.LLEnabled BOOL Specifies whether a low-low alarm condition detection is enabled. Set - Condition detectionenabled. Cleared - Condition detection disabled.Default is set.AckRequired BOOL Specifies whether alarm acknowledgement is required. Set - Acknowledgement required.Cleared - Acknowledgement not required.Default is set.Publication 1756-RM003I-EN-P - January 2007