modbus

[seb123456_1999]

Dear Sir, Madam,

 

I have a machine TLM2 (engine control device) plugged by TCP/IP port. This device has the following modbus commands are supported by TLM2 .

 





Read Holding Registers (0x03) :


Read access on one ore more subsequent word registers.



Write Multiple Registers (0x10) :


Write access on one ore more subsequent word registers.

 

I would like to know how should I proceed to command this device using Labview.

 

Best regards,

 

Sebastien Champemaud

[unclebump]

You could start with the NI modbus library for a small amount of data.
<a href="http://sine.ni.com/devzone/cda/epd/p/id/4756" target="_blank">http://sine.ni.com/devzone/cda/epd/p/id/4756</a>
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If you want to access hundreds of registers, I would recommend the NI DSC module.
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<a href="http://sine.ni.com/nips/cds/view/p/lang/en/nid/10418" target="_blank">http://sine.ni.com/nips/cds/view/p/lang/en/nid/10418</a>

[JTerosky]

Attached is a small vi using the MODBUS library.&nbsp; It accesses a Serial MODBUS device.


MB Serial Query3.vi:
http://forums.ni.com/attachments/ni/170/347032/1/MB Serial Query3.vi