NI Instrument Simulator Model No: 183913C-01

[ceilingwalker]

After setting DIP switch 8 to off (Serial Mode), the "Listen" LED on the simulator is lit. I don't know if that is supposed to happen or not.

[Dennis_Knutson]

According to the manual, it means it's waiting for a command.

A quick check can be done in MAX with the VISA test panel. Do a query of *IDN?\n. This should return the identification of the simulator. The \n is the required line feed terminator.

[ceilingwalker]

Yes Sir, it did. It displays "1: Write Operation (*IDN?\n)  Return Count: 6 bytes  2: Read Operation  Return Count: 7 bytes 00062\r\n". Thank you, this at least tells me they are talking.

[Dennis_Knutson]

You should get a lot more than 7 bytes back according to the manual. Try different combinations of the term character such as \r or \r\n.

[ceilingwalker]

I querried several times rapidly and the Read Operation and the Return count goes from 7-62 bytes. Thats querrying as rapidly as I can, with my mouse.

[Dennis_Knutson · Accepted solution]

The 62 bytes seems correct. It should return 'National Instruments ...' as shown in the manual. You should be okay to go. Quite frankly, I wouldn't bother with the GPIB emulation. Any instrument driver that uses VISA will work transparently with GPIB, USB, Ethernet, and serial. It is only serial that needs additional code to set the com port and termination characters. Look at your 34401 instrument driver to see how it's handled.

[ceilingwalker]

Thanks much for your support Dennis.