Honeywell HC900 - HLLM High Low Limiter Function Block

Function Blocks
HLLM High Low Limiter Function Block
168 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
HLLM High Low Limiter Function Block
Description
The HLLM label stands for High Low limiter.
This block is part of the
Auxiliary category.
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
Block properties
Double click on the function block to access the function block properties dialog box.