Honeywell VRX180 Manuale Utente

 

ATTENTION 

Note the difference between programming a discrete parameter with OFF and programming it with a 0. “OFF” 
means “not connected”; 0 means “off state”. 

 

The second type of programmable parameter is a function block parameter.  A function block 
parameter’s data is contained within a function block and cannot be connected to another function block.  
When you are programming a function block and are not given a choice of PARM, you are programming 
a function block parameter.  Typical choices when programming a function block parameter are NONE, 
OFF, any numerical value, or a list of options—but not PARM. 

Here is the procedure for programming a function block parameter.  It is an example using a specific 
function block parameter, but the keystrokes used will apply when you are programming any function 
block parameter. 

Continuing with the example from Figure 3-8, assume we want Analog Output#1 to default to its lowest 
value if the input source, LP2 OV, fails.  Therefore, we must program Analog Output#1’s failsafe 
parameter with the appropriate selection.  The following procedure shows how. 

 

1 

In the Program Analog Output menu, select ANALOG OUTPUT#1. 

2 

Consult the Program Analog Output section of this manual to learn about the menu item you wish to 
change, namely, FAILSAFE. 

3 

Press the Down Arrow button to move the cursor down to FAILSAFE. 

4 

Press Enter to move the cursor to the right side of the display where the choices for FAILSAFE are. 

5 

Press Up Arrow or Down Arrow until DOWN is displayed. 

6 

Press Enter to select DOWN.  The cursor moves to the left and DOWN is selected. 

This section describes how to program your instrument.  You should practice doing these procedures 
until you are familiar with the buttons and menus. 

1 

Select the desired function block from the Program menu. 

2 

Program each of the function block’s input parameters with OFF, a number, or an output code from 
another function block.  See section 3.11 for this procedure. 

3 

Program each function block parameter with a number, selection, NONE, or OFF.  See section 3.11 
for this procedure. 

Continued