Guide me how to read the data using serial communication protocol

[NILESH_MHALIM]

Hi ,

I have done lot of try and search to form communication, but not Happened...Plz guide me.

Protocol have the following Frame format:

Header---Address------Command-----Data-------CRC-----Trailer.

How to establish the communication between Slave and Master?

Is it possible by edit the Modbus based VI ?

Let me know if there is way to do that.

Regards,

Nilesh

[crossrulz]

You need to be a lot more specific.  What bus are you using?  Is this an exact standard?

At a quick glance, this is looking like a Modbus protocol.  You might want to check out the NI Modbus Library for LabVIEW.

[NILESH_MHALIM]

Actually, it is Proprietary(Company's own Protocol) based on RS485.

Is it possible to communicate Over this Protocol using LabVIEW?

Should we develop or should NI has facility to Provide it if i tell them to implement it by paying amount ?  

[crossrulz]

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@NILESH_MHALIM wrote:

Actually, it is Proprietary(Company's own Protocol) based on RS485.

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Ok, you are using an RS-485 bus.  That should just show up as a COM port on your computer.  You will want to use VISA to communicate over this bus.  What you need to do is build up the message into a string and then write the data to the port.  Take a look at the Simple Serial Write Read example.