Honeywell HC900 Reference Guide

Function Blocks
VLIM Velocity Limiter Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 429
2/07
Block properties
Double click on the function block to access the function block properties dialog box.
Configuration parameters
Table 127 VLIM Configuration Parameters
Properties Group Parameter Index # Parameter Description Value or Selection
Set Limits
Increase
Rate Limit
0
Limits the
increasing rate at which
the analog input value can change
0 to 99999 (eu/min)
Decrease
Rate Limit
1
Limits the
decreasing rate at which
the analog input value can change
0 to 99999 (eu/min)
Example
HFigure 119 shows a VLIM function block that limits the increasing or decreasing rate at which the output
can change based on user specified limits when the Enable input is ON (1).
Output
Input
Figure 119 VLIM 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