Commands in Serial Communication

[jeyanthi]

hi,

I have use some commands to read data from the hardware(sensor)

if i use the commands in hyperterminal it is working if i used in labview it returns empty data.

Why it happens?Is NI not able to read characters..how to solve this problem

[jeyanthi]

I was suspecting of the ASCII because in hyperterminal we able to set the echo and time to reterieve data. How to set echo in labview?

Plz help, Thank u

[Henrik_Volkers]

It's a common first time(r) problem.

In general: What runs in hyperterminal can also run in LabVIEW... 

Hyperterminal will add END OF LINE codes like CR LF automatically 

In LabVIEW you will need to add them.... 

Search the forum for the keyword hyperterminal.... 

[jeyanthi]

Can u give me the link plz because wen i search "keyword hyperterminal" i found empty result...plz help

[jeyanthi]

i already try with the \r\n replacing the CR in the hyperterminal.. it giving me empty reply without no error.. but hyperterminal its ok.. wat are the posibility of this problem?..need help plz.

[Dennis_Knutson]

Could you explain exactly how you are trying to send the commands? Are you using one of the examples or is this code you wrote? If it's your code, why don't you attach it so someone can look at it.

[jeyanthi]

i use carriage return constant and able to get reply using labview serial communication...but let say i use this command ?RR<CR> it reply empty string..it reply in hyperterminal but labview i cant get.. why?...confius... i use 9600,N,8   COM 1 setting ..plzz help

[jeyanthi]

i have attach a pic with tis

[Dennis_Knutson]

I don't understand. You say you are able to get a reply and then you say you aren't able to get a reply.

Have you tried using a CR and a LF. And what version of LabVIEW are you using?Those serial functions are really, really old and have not been supported for several years.

p.s Attaching a partial image is NOT the same thing as attaching the actual code. 

[jeyanthi]

Yup i have  use the cariage return  in the string palete .. is not responding... with the whole command...like ?RR<CR>

Im using labview 8.0

Actually i get this from my senior which already left the company and i have been told this is working perfectly .. but now im not sure ... if i send CR it reply *** which is correct b'cos hyperterminal also giving me the same...but let say i  type ?RR<CR> it doesnt reply anythg ... but with hyperterminal it replies"@@@"...

The labview development file i cant attached cos too big too send through