Honeywell HC900 Reference Guide

Function Blocks
HLLM High Low Limiter Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 169
2/07
Configuration parameters
Table 52 High low limit configuration parameters
Properties Group Parameter Index # Parameter Description Value or Selection
Set Limits High Limit
0 High limit value for analog (X) value –99999 to 999999
Low Limit
1 Low limit value for analog (X) value –99999 to 999999
Example
HFigure 40 shows a Function Block Diagram using an HLLM function block to provide a remote setpoint
signal within specified limits to a PID Control Loop.
X Input
Output
X HI
X LO
HI*
LO*
X
OUT
{
{
Figure 40 HLLM function block example

Honeywell HC900 Specifications

General

Series	HC900
Redundancy	Optional
Programming Language	Function Block Diagram, Ladder Logic, Structured Text
Inputs	Analog, Digital
Outputs	Analog, Digital, Relay
Display	Optional
Control	PID, Advanced Control
Power Supply	24V DC or 100-240V AC
Storage Temperature	-40°C to 85°C
Humidity	5% to 95% non-condensing
Communication Protocols	Modbus, Ethernet