Autodetect GPIB when plugging in

[hwalke]

Hello, I am trying to automatically detect when a GPIB 488.2 is plugged into my device so that I can disable the buttons on it, i.e. enter remote mode. Is there a pin of the GPIB I can route to my micro controller that will be pulled high or low when connecting? I don't know a whole lot about GPIB. Our old version of this device was capable of auto detecting a 488.2 so I know it is possible but it was designed 25+ years ago so there is no way of figuring out how its done.

[Minions]

You would need to have your GPIB controller poll through the addresses.  If you connect a new instrument to the GPIB bus, nothing happens until the controller attempts to address the instrument in some manner.  At that point in time, the instrument will be placed into remote mode if available.

[hwalke]

Can you explain the process of polling through the addresses?

Can I just have the REN line pull an interrupt pin high on my microcontroller when plugging it in since REN is high by default?

[Henrik_Volkers]

Seems that you are designing a data source not a controller.

One trick to detekt the connector is to (ab)use two GND lines (the rs488 has a bunch of them) and detekt a connection between them.

But using the REN potential is the recommended / intended way to detect that your device is under remote control.