Help with MODBUS over TCP

[Grub]

Hi all,

I have an emergency situation where I'm supposed to integrate an ADAM 6050 (Advantech) Ethernet enabled DIO device into our existing LABview based DAQ system.  It uses a Modbus over TCP protocol(s) to communcate.  I have never even cracked open a MODBUS manual, and I have only ttwo days to complete the project.  Luckily I only need to send one command to device.  Are ther any example programs out there or short tutorials that anyone would recommend?

Grub

[unclebump]

Download the modbus library from the NI site. Here is a sample modbus query from an ethernet device. 7.0 format

[Grub]

Thanks for the reply....I did download the MODBUS DLL that Labview published awhile back.  I tried using some of the code in there, but I couldn't get anything to work correctly.  I finally just used the TCP functions OPEN>WRITE>CLOSE, and wrote the commands that way.  It seems that sometimes the NI engineers get a little too clever with their VI's.  I'm sure they work great, but for somebody that doesn't know much about the protocol, its confusing to go through 5 levels of subvi's and multiple cases. 

I'm going to read more about the protocol over the next few weeks and try to decipher what's going on in the NI VI's.

Thanks again,

Grub

[unclebump]

Try this link. It is for 7.1 format files. I have 7.0 format at work.

http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=F1582737BACF5CA8E0340003BA7CCD71

[ramanoar]

---

@unclebump wrote:

Try this link. It is for 7.1 format files. I have 7.0 format at work.

---

Hey there unclebump. Could you please send me the 7.0 version of the library?
I'm really in need of that right now.

Thanks in advance,

Rafael.

[unclebump]

See this thread.

http://forums.ni.com/ni/board/message?board.id=170&message.id=135288&requireLogin=False

[ramanoar]

Thanks unclebump, I got the library, and will try to use it.

best regards.

[Vedeja]

Grub!

Could you post your TCP vi for the 6050 module?

/Stefan