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Why demobox for lookout basics is not communication?

 
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Message 1 of 6
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Do you get any alarms?  If yes, what do they say?
 
-Khalid
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Message 2 of 6
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In the alarms window: No communication response from modbus secondary.
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Message 3 of 6
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Are you using the default settings for the Modbus object?  Also make sure that the serial cable is a straight one (as opposed to a null-modem one). 

-Khalid

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Message 4 of 6
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yes using the default settings for the Modbus object

 

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Message 5 of 6
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Are you using a staright-through serial cable?  Can you verify that the COM port itself is functioning correctly.  You can do this by doing the "loopback" test:

http://zone.ni.com/devzone/conceptd.nsf/webmain/D48BA43C59B60277862569EE000501FD?opendocument

Hope this helps,

-Khalid

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Message 6 of 6
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