User`s guide

Function Blocks
Function Block Categories and Types
Release E UMC800 Control Builder User’s Guide 77
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Alarm/monitor category
Table 23 lists the function block types in the Alarm/Monitor category.
For an overview of Alarms Configuration, refer to Appendix C – Alarm Configuration Overview.
Table 23 Alarm/monitor category function block types
Block Type Description Graphic Form
HMON
High Monitor - Monitors two analog input values (X and Y)
and turns ON a logic output if X exceeds Y.
A hysteresis adjustment is provided to prevent output cycling.
LMON Low Monitor - Monitors two analog input values (X and Y)
and turns ON a logic output if X is less than Y.
A hysteresis adjustment is provided to prevent output cycling.
ASYS Analog System Monitor - The analog system status block
provides read access to analog control system values to be
used as an input to another block or for monitoring purposes.
A dialog box allows you to set the controllers 50/60/Hz noise
rejection selection.
NOTE: The block will be assigned Number 249.
ALM Analog Alarm - Provides the setpoint, PV compare attributes
(for comparing against another input or a fixed value) to
generate a logic status output for OFF-normal conditions that
may be enunciated by the operator interface as an alarm.
Provides a delay selection and latching functions.