HART DLL testing with HCF test tool for Gap error

[prashg]

Hi,

I have written hart application software for HART slave, and it is communicating with HART master properly on 4-20mA loop.
Now i am testing my slave device with HCF test tool. I am facing problem to pass gap error test case. I have taken care of character time requirement i.e not more than 9.17ms. I have checked it on oscilloscope. But still i am getting gap error or communication error hence test case fails.
This HART communication uses FSK technique.
My question is what action should take to avoid gap error ? Or it is acceptable due to carrier detection problem gap error is get sometime?

 

[hemnath]

hi prashg,
this reply is not relevant to your question.

I'm willing to learn about HART protocols and DDL. Do you have notes for that?
Do u write hart application software in Device Description Language?

If you have notes, Please share it. It would be really helpful for me. Please help.
Also i'm working on a project which uses HART.

Thanks in advance

 

[prashg]

Hi hemnath,

you can download it from HCF web site if you are member. Member ship is required for downloading some documents ,

 

[hemnath]

Thanks for your kind reply.

To get membership in HCF, i have to afford more dollars. Even I don't have that much amount to spare.

If you have any materials, Can you please share it. It would be really helpful for me.
To Learn DDL, i have to flight to US. That cost more.

Thanks

 

[prashg]

Its ok ..thanks to you showing interest in HART project
Ya you are right.
just search on Google HCF specs 500 and 501 for DDL .

 

[hemnath]

Thanks for the information.
I'll check on google and get back to you soon.
Thank you very much for considering the replies.

 

[hemnath]

sorry to post on very old thread.

Can you please send documentation files regarding HART