Crestron cnxfz User Manual

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Crestron CNXFZ 
Focus/Zoom Control Interface
 
Detail View of an Analog RAM (S-2)  in SIMPL Windows’ Programming Manager 
 
Application for an Alternate Method of Control 
NOTE:  There is no need to recreate the sample programs referenced below. A copy 
of the programs are available from Crestron’s ControlCD (version 5.2 and later) or 
the Software Downloads page (Examples Library) of the Crestron website 
(www.crestron.com). Search for the CNXFZ2.ZIP file. This zipped file contains the 
necessary files to recreate the following programming sample.  
This alternate method of control utilizes the VT-3500 and a program for the  
CNMSX-PRO using the CNXFZ network control module. This example program 
actually offers two methods of control in one program. In CNXFZ.VTP, there are 
two pages (Main with buttons and Main with slider). Each represents a different user 
implementation. 
In one method, the user wants buttons to select the focus and zoom action (one 
button for each direction). The program provides buttons to store and recall presets 
as well. Use the CNCAMI rate control module from the Crestron Modules folder of 
the Symbol Library to provide an analog output (focus_rate and zoom_rate). These 
outputs control focus and zoom via two digital (button) inputs.  
The other method uses the analog value directly from the touchpanel. Use the “snap-
back” feature of an analog slider for a different look. Typically, this appearance is 
superior, but most users prefer the discrete buttons for real-world control.  
Position/Rate Mode Definition 
In position mode, a voltage corresponding to a position of the lens (focus or zoom) is 
fed to the lens interface and the lens moves the motors to the position that 
corresponds to the input voltage. In rate mode, the voltage fed to the lens 
corresponds to the rate and direction in which the motor moves. The result is smooth 
lens movement.  
Operations Guide - DOC. 5753 
CNX Focus/Zoom Control Interface: CNXFZ  
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