MODBUS RTU SERIAL

[sound nt]

I would like to know the basics for the Modbus rtu serial server in DSC the document in the labview is given for periodic server

If some changes are to be made plz specify

Thanks

Regards

Pallav 

[Ben]

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sound nt wrote:

I would like to know the basics for the Modbus rtu serial server in DSC the document in the labview is given for periodic server

If some changes are to be made plz specify

Thanks

Regards

Pallav 

---

What kind of changes would you like to make?

Please provide a zip of your project and clearly specify your end goal.

Just trying to help,

Ben

[sound nt]

I have a device (RTU) which gives modbus register output and i want to read it at the PC end Plz guide for the above for procedure to be followed. Thanks for replying

[unclebump]

you may not need the entire dsc module. How much info do you want to read and how fast?? Try the NI modbus library.

http://sine.ni.com/devzone/cda/epd/p/id/4756

Lots of examples for this code in the forums.

[sound nt]

Thanks for replying

I need to read more register at higher data speed so if i m not wrong i'll have to use the DSC module,

If i'm wrong plz correct me 

Can i have the link for basics for DSC module (MODBUS)

Thanks for taking interest.

Regards

[unclebump]

How many is more? 100, 500, 1000?? 10ms, 50ms, 100ms scan rate??

[sound nt]

Sorry for Delay

Its 200 for 50 ms Is it done by modbus lib or dsc is needed?

Regards

[unclebump]

if they are all consecutive registers, you could do this with two modbus read commands in blocks of 100 registers. This could probably be done with just the NI modbus library. Use RTU mode and set the baud rate to 19200 or higher.