i have a device that mesures pressure THERMOVAC TM22 by LEYBOLD the user's manual is here.
the communication to this device is through its RS232C port and with the 7-bit ASCII code.
to be clear i need some explaination about writing with 7-bit ASCII code:
the user manual in page 18 and 19 gives me some instruction about what should i write to get mesurements ( ,,MES R TM1 <CR>'' ) but i don't know, shoud i write it as it in the write buffer or what and to read information what should i do?
i did write it as it and an error (-1073807339) in the visa read.
the probleme is that i'm new with labview so after reading some topics in NI forums i found this guy who have a similar probleme as mine with the same error but i didn't understand a lot. So can anyone helpe me plz.
( sorry for may ignorance and my spelling)
ok i'll try hyper terminal tomorrow but first i need to ask how i write this instruction ( ,,MES R TM1 <CR>'' ) in the write buffer with 7 bit ascci code ?
I saw another serial related thread today,m I think this VI has the same problem. You should almost never use BytesAtPort to determine the serial read. This will return immediatley, probably before the instrument has responded. Instead, enable the termination character when you initialise the port and wire a large number to Bytes To Read. Then the Viea Read will wait for the termination character and return the proper response.
sorry but i don't understand what do you mean about "check the display mode of the string control as I already said."
sorry i'm super amateur
Right click the string control and set display mode to codes display. Then you know what you are sending. try my idea too
thank you guys for helping meand as you adviced me i did modifiy my VI and i hope this will work, i'll test it tomorrow: