Honeywell HC900 Reference Guide

Function Blocks
WVAR Write Variable Function Block
434 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
WVAR Write Variable Function Block
Description
The WVAR label stands for Write Variable.
This block is part of the
Auxiliary category.
Function
Writes a new value to a selected Variable number.
Select the target variable number from the specific function block reference data and enter it in the
appropriate field in the “Write Variable Number” dialog box.
• If EN is ON, then the Variable selected is set to the value of X.(For example: X = a constant value)
Inputs
X =
Value to be written to the selected variable
EN = Enable command
Target write variable number
Double click on the function block to access the “Write Variable Number” dialog box.
Enter the Target Variable number in the appropriate field.
Selections are from 1 to 600.

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