Is it possible to control a GPIB instrument by the instrument through GPIB

[Selva]

I'm having a Function generator, it has an in built GPIB, I'm writing an application on oscilloscope which also as GPIB, I have connected the GPIB port of oscilloscope to the FG GPIB port. I tried to send a GPIB command from the oscilloscope to the function generator. I wanted to know whether it is possible to control an instrument from a instrument through GPIB.

[GPIB_Guru]

The answer is yes and no. There are three categories of devices:
talker/listener
talker/listener/controller
talker/listener/controller/system controller

Most instruments are "talker/listen-only". All they can do is act like a device on the GPIB.

You do run across a few instruments that are "controllers' as well. These instruments can be passed control from the system controller to temporarily control the bus, perhaps to calibrate themselves with a collaborative instrument. To find out if your instrument supports this, you probably need to look in the instrument's user manual.

The other option is for the device to be a system controller. This means that the device can control the bus at bootup (system controller) and run a host-side API (i.e., NI-48
8.2) to control an instrument. This sounds like what you are interested in.

I hope this helps.