Honeywell VRX180 - Manual (Page 72)

Programming and Operating Concepts
Video Recorder – User Manual 58
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”.
3.12 How to program function block parameters
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.
Programming procedure
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.
Table 3-8 Example Function Block Parameter Selection Procedure
Step Action
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.
3.13 How to program a simple configuration
This section describes how to program your instrument. You should practice doing these procedures
until you are familiar with the buttons and menus.
Table 3-9 Function Block Configuration Procedure
Step Action
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