using VISA without a driver for my inficon Quartz microbalance monitor

[alex321]

so I have the windows USB driver installed, but MAx see it as a serial port. I was hoping to use it as USB device But not to worry

There is no labview driver for this device. I have written a standard visa program, but it does not work at the read visa. I get this error Error Code -1073807253 which I think means I don't have the correct byte Slze of return message. I do not know what size to expect Isa nothing in the manual. Is there a way I can simply say Accept every that the device Sends back?

hank S for taking the time t o read

Alex.

[JÞB]

That would be a "Virtual COM Port" using the "RS-232" interface.

Usually, I would say RTFM! available here but Quoting from TFM:

 Well, at least you don't need to find a 5 1/4 in floppy drive

for the PHY layer, I hope your USB to RS-232 supports hardware handshaking (the cheap ones don't) and signal levels that are RS 232 Compliant (how can you be "Compliant" to a Recommended Standard- Yeah that is what the RS in RS-232 stands for)

At the message layer: SOM (start of message) appears to be 255, 254 followed by address, data length, data and a CSUM.  That is one unique message protocol!

Are you sure you need that thing?  It sounds like the FW engineer was taking some BETA dosage from Timothy Leary in the early 1950's.  You are going to need a driver.  Whether you think you need to write one or not you are going to write a driver.

[ViolaineV]

Hi,

Is your quartz µbalance monitor the STM-2 ? I think I have exactly the same problem you had ! Is it working for you now ? What is the command string your are sending ? Could you send me an exemple of your code ?

Many thanks,

Best regards,

Violaine.

[luke123456]

Hi Violaine,

I appreciate that this is a very old post but did you ever get anywhere with communicating with your STM-2? We're in the process of trying to write our own software and are really struggling to decipher the communication strings....

Many thanks.

[Yamaeda]

From a message above "At the message layer: SOM (start of message) appears to be 255, 254 followed by address, data length, data and a CSUM.  That is one unique message protocol!"

That doesn't sound too hard.