Modbus and cFP-DI-304 data packet

I’m using a host computer to communicate with the cFP-DI-304 using Modbus over Ethernet.
When the cFP-DI-304 (revision D) is polled, it is returning incorrect data (looks like a timing issue). What is the sequence and data package when the cFP-DI-304 gets polled? Does the data sequence starts from pin 1 to pin 32, pin 32 to pin 1, or some other combination? Also is the package 8 or 16 bits?

Please post any VI's you have for doing this communication. Is the cFP-DI module on a backplane with a cFP controller or a communications module?
I'm not familiar with using ModBUS to communicate with individual cFP modules. The usual method is to use datasockets or shared variables.

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Edited by: Rahir on Mar 26, 2009 3:26 PM
Edited by: Rahir on Mar 26, 2009 3:40 PM

Hi All,
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Edited by: Rahir on Mar 27, 2009 6:25 AM
Edited by: Rahir on Mar 27, 2009 7:34 AM

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Message was edited by:
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Duplicate Post

How to select more than one data packet?

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Modbus and cFP-DI-304 data packet

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