error-1073807339 occured at VISA read in hotplate.vi

[diazo]

I made 2 programs one for a hotplate with connection rs232 and the other a potentiostat with gbip. they give between 0-15 readings and then out put an error message

error-1073807339 occured at VISA read in hotplate.vi

VISA: (HEX 0xbfff0015) timeout expired before operation complete

[Omar_II]

You are trying to read the port when there is nothing there to read.

Are you reading faster the the devices can talk?

Do you have to request more data? (a write command)

Try...

• Check for bytes at port before reading.
• Program a longer time out.
• Ignore the timeout and loop around and try again.
• resend the request for data command
• ?