Remote Control via RS232

Question

I want to remote-control my analyzer with LabWindows via RS232. Can you tell me how to proceed because all my trials were in vain. Remote control is successful with GPIB, but I prefer to use RS232.

Answer

There can be some problems with remote control via RS232:

1) Settings in the analyzer - SETUP => GENERA SETUP => COM INTERFACE

- The OWNER must be INSTRUMENT. If it is OS, you're not able to remote-control

the FSP.

- Check the baud rate, parity bit, data bits and the handshake against the

settings of your PC/LabWindowsCVI program.

2) Settings on the PC

- Programs that are running in the background of the PC (firewalls,

anti-virus, printer server, etc) sometimes interfere with remote control.

- Check the baud rate, parity bit, data bits and the handshake against the

settings of your PC/LabWindowsCVI program.

3) The cable

- You need a double-crossed cable, i.e. a null modem cable.

- Check the cable for defects.

4) The LabWindows/CVI program

- First, you have to initialize the RS232 port as in and out port by using exactly

the same settings for the COM INTERFACE as on the FSP.

Then, try to send '*IDN?' to the FSP using a HYPER TERMINAL and

check in this way if your PC and the FSP can communicate.

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