Hllm Function Block - Honeywell UMC800 Reference Manual

Function Blocks

2.26 HLLM Function Block

Description
The HLLM label stands for High Low limiter. This block is part of the Auxiliary category. It looks like this
graphically on the Control Builder:
Function
Provide high-low limit for an analog (X) value.
Turns ON H or L digital output if input exceeds or falls below set limits.
•If X < or = Low Limit value, then: OUT = LoLlM; L = ON; H = OFF.
•If X > or = High Limit value, then: OUT = HiLlM; L = OFF; H= ON.
•If X > Low Limit value and < high Limit value, then: OUT = X; L = OFF; H = OFF.
Input
X = Analog Value
Output
OUT = Analog value within limits
L = Low Limit digital indication
H= High Limit digital indication
80 Function Block Reference Guide
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