Communication error with Keithley 2602 by RS232 - USB interface

[Showtime_DW]

Hello Everyone:

I am trying to control a Keithley 2602 Sourcemeter using LabVIEW v.8.2, however I am having trouble getting them to communicate. I am fairly new at LabVIEW and have not found the user manuals to be of much help since they specify that the process for this step is different depending on the equipment you are trying to connect to.

I have the visa updated and install the driver in the labview folder. I first using GPIB to communicate with Keithley which run great!  But I have a chassis without GPIB port and I need to use RS232 to achieve that.

So basically I am using straight through RS232 direct connect to NI but did not work,and I can't find the corresponding port in NI-Max. So I tried using RS232-USB then finally see the port shows.

but still, I have communication error. Please give me some advises. Appreciated it.  ( I confige the Keithley communication method to match the setting in PC, plus I use the right port to interface)

[Showtime_DW]

Error 4  picture

[Dennis_Knutson]

I don't get the RS485 setting, I don't see where you are actually sending a termination character, you need to verify whether a null modem or straight through cable is required.

[Showtime_DW]

Thank you for the reply. I use straight through base on the Manual.

[Dennis_Knutson]

I'm not going to download the manual so I'll take your word for it.

Append a termination character on your write. Try another terminal emulation program.

[Showtime_DW]

Sorry, may I ask what kind of terminal emulation I should try? Could you give me some examples?

[Dennis_Knutson]

Hyperterminal, putty, procom, teraterm.

[Showtime_DW]

Thanks Dennies. I solved the problem by using the right cable (RS-232) . I was using RS485 and I can't tell the differences until I used DMM to test the pin out. Now I have to figure out how to use Labview to control the Keithley for dry circit testing.