GPIB address is not consistent when read by MAX

[C-J-A]

I'm trying to control a Solartron 1286 potentiostat via GPIB-USB-HS with a PC. The GPIB address which I set manually on the GPIB port is not consistent with the reading by MAX when I scan for instruments. (e.g. If I set the address two 2 on the back of the instrument, and set it to 2 in the MAX interface, MAX still reads it as 3. If I set it to 4, MAX reads it as 5.)

I should note that I did not have this issue the day before when I started working with this instrument where both addresses matched and I was able to control the instrument as expected.

I'm happy to provide more information.  Thank you for any help!

Chris

[crossrulz]

If I had to guess, I would say it sounds like you did not toggle the A0 switch.  Or maybe the instrument only wants to have an odd address.  What happens if you set the address to 3 or 5?

[Dennis_Knutson]

What do you mean, setting the address in MAX? The only address you can set is the controller address and that has to different. Leave the controller alone and set to address 0.

[C-J-A]

What is the Ao switch? The instrument needs to have an even address. When it is set to odd, it's read as even when scanning for instruments. I must have done something the day prior when giving commands in interactive control which caused this.

[C-J-A]

The controller needs to have a even primary address for this instrument. I was setting it to 2 or 4. What I meant by setting it in MAX, was setting the primary address of the controller in the general settings.

If I leave the controller address alone and set the address to zero, it read it as being one, not zero.  

[Dennis_Knutson]

I find it hard to believe that an instrument requires a controller to be set to anything other than a different address. Anything else is completely outside the 488 standard. No matter what, in MAX, the controller address will show up as whatever you have set it to. Disconnect all instruments and do a refresh. The controller should show up all by itself. Then do a scan for instruments. The instrument show show up separately and it MUST be on a different address. You do not set the instrument address to be the same as the controller. If it does not, then the instrument is broken.

[C-J-A]

I see now that the controller address is determined by MAX. I was setting both the instrument and GPIB to the same address unknowingly like you mentioned.  Thank you for the help!