Hallo all expert,The attachment is a vi which is expected to write/read data to/from COM1 of my machine. For verification, I simply short circuited pin 2 and 3 of the RS232 port. However there are some questions following my experiment:1. In the chart the label of x-axis can not be restored to be 0 to 100, it automatically increases without limits. I wish it start from 0 instead resuming a time instant;2. In the "read string" field the display is not updated during my typing characters in "string to write", although I have enabled "Update Value while Typing";3. The display in the chart doesn't correspond to what I have typed. Should I need more functions in order to show up the data?My final purpose is to use this interface to communicate a pic chip which I programed to realize A/D conversion. At begin, a value is ought to be sent to the chip where the value is compared and if it is "1"f, then the conversion is initiated, and the value is read in the chart and could be also saved a excel file for documentation.I'm wondering how to input value "1", instead string "1". I successfully type "Ctrl-A" in HyperTerminal, but have no idea which function is due to be used to realize the corresponding conversion.

LabVIEW

Desperate questios on RS232 Communication

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Thank you Lynn again. The attachment is the latest version of my oscilloscope which measured output of a power supply from HAMEG. The conversion and write to spreadsheet have been added. Now it looks chic 😉
win2s

Message Edited by win2suse on 04-21-2007 12:59 PM

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Desperate questios on RS232 Communication

Re: Desperate questios on RS232 Communication