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How Can I Disable Logos XT and Use Logos?

Primary Software: LabVIEW Development Systems>>LabVIEW Professional Development System
Primary Software Version: 1.0
Primary Software Fixed Version: N/A
Secondary Software: LabVIEW Modules>>DSC Module

Problem:
I wrote a program using Logos.  Now that Logos XT is used by default in LabVIEW 8.5 and above I have noticed that the shared variable behavior has changed. I need a way to turn off Logos XT to keep my original shared variable behavior.  How do I turn off Logos XT?

Solution:
The method for turning off Logos XT is different depending on which operating system and version of LabVIEW your program is running.

LabVIEW 2009
New tags have been added to disable or enable certain Logos or Logos XT services. In general, the configuration entry has the following format:

{SERVICE}.Disable{TRANSPORT}={"True" | "False"}

For example, if I wanted to disable all Logos XT services to use only Logos services you will have to enter the following strings:

[logos]
Global.DisableLogosXT=True
Global.DisableLogos=Flase

As done before, you will need to update both the Windows host computer and LabVIEW Real-Time controller, then restart both machines for the settings to take effect.

Windows
On Windows the settings are stored in logos.ini. The INI file is stored in the all users application data directory, under the folder National Instruments\Logos. By default, this is C:\Documents and Settings\All Users\Application Data\National Instruments\Logos on Windows XP and C:\ProgramData\National Instruments\Logos on Windows Vista.

Real-Time
On a real-time (RT) system you will need to FTP into the controller and add the configuration strings to the ni-rt.ini file.

LabVIEW 8.6.1 and below
Windows
To disable Logos XT on Windows, you must add an entry to the Windows registry.  Here is the key to add:

HKEY_LOCAL_MACHINE\SOFTWARE\National Instruments\LogosXT\DisablePSPXT

Set this key to a DWORD value of 1.  Upon rebooting your system you will be running Logos instead of Logos XT.

Note:  National Instruments strongly suggests making a backup of the registry before editing.  Take extreme caution when editing the registry, as you can affect the integrity of the operating system.

Real-Time
When disabling Logos XT on a real-time operating system, you must add an entry to the ni-rt.ini file on the target.  Follow these steps:
  1. FTP to the RT system by opening an Internet Explorer window and typing
    ftp://IP-ADDRESS
    where IP-ADDRESS is the actual IP adress of your RT system (eg. 192.168.0.1).
  2. Locate the file named ni-rt.ini and copy this file to your system.
  3. Open the file with a text editor and add this section:
    [logos]
    PSP.DisableLogosXT=1
  4. Save this file and FTP it back over to the RT target.
  5. Reboot the target.  It will boot up running Logos.



Related Links:
NI Developer Zone Tutorial: Using the LabVIEW Real-Time Communication Wizard
NI Developer Zone Tutorial: Using FieldPoint Logos Server with the LabVIEW DSC Module

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Report Date: 12/03/2007
Last Updated: 01/21/2010
Document ID: 4G2FNV2F

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