"Subramanian, Shankar, K" <[EMAIL PROTECTED]> wrote: >I have done data acquisition using NI DAQ card for one of my projects. Right >now, have a small project in which data needs to be acquired from a serial >port. The system has a temperature controller unit which sends data to the >serial port and needs to be collected using LabView. > >How different is it to configure and acquire data using serial port rather >than NIDAQ card. Could anyone help me out in this? Also, this is going to be >done using LabView 7 - Evaluation Version. I guess there are no restrictions >while we use evaluation version. I hope all the features of a full >development system could be used.
Hmm, how do you suppose National Instruments making money to pay for the development of LabVIEW if the Evaluation version could do the same things than a normal development system? As far as replacing NI-DAQ calls with calls to communicate with your serial device, that is quite easy if you have the VIs to talk to your serial device already. Otherwise it is about writing a VI or two to communicate over the serial port with whatever protocol your device has. This part can be tricky because in the serial port not even the low level communication parameters are always the same. RS-232 stands for Recommended Standard and it is nothing more than that. Each manufacturer has its own ideas about how to interprete that standard and the communication protocol itself is not standardized in any way. You have almost as many protocols as there are manufactureres out there. Once you got that VI working it is basically just replacing the DAQ VI with your device communication VI. Rolf Kalbermatter CIT Engineering Nederland BV tel: +31 (070) 415 9190 Treubstraat 7H fax: +31 (070) 415 9191 2288 EG Rijswijk http://www.citengineering.com Netherlands mailto:[EMAIL PROTECTED]
