Dear all,
Recently, I have worked RS-232 communication with a commercial instrument from Inficon.
During the work, I have several problems which had resoved but didn't understood the solution.
1. In reading a responsed data, I got to know the very correct size of data byte should be written in VISA Read function.
If the byte was less than the correct value, there is a flow of data stream.
(In this case, I thought there remained some unread data in the commnuication.)
In the case of writting a higher value, the response time was very slow (about 1 sec. delay for the next command).
Why the response time was so slow even if the correct data could be read?
2. In my instrument, the termination character is
, ascii code #6, Positive Acknowledgement.
But, as you may know well, the character could be changed, like \r or \r\n, depending on a instrument.
Is there some universal termination character which could be used in every insturment?
3. In writing RS-232 program, could you explain me when I can use other speicial characters, like "\":#2, "\":#21, or "\":#10.
Thank you in advance.
Lee
