3421A CAL RAM

[J-F Garnier]

(04-04-2017 04:08 PM)BobVA Wrote:  - Realize ILCtrl can't issue a "Talk" command, so even though I can send the "B2" command, there's no way to read it.

ILCtrl can read data from a device, for sure, using the 'Enter' button. With the 3468, there is no problem to read the measurements.

Why doesn't it work with the 'B2' command? Because ILCtrl sends a 'Interface Clear' and re-addresses the loop (kind of 'RESTORE IO') before each action to make sure the HPIL addresses are valid, in case the loop configuration was changed. This is very similar to the way the HP41 operates.
This is the 'Interface clear' (IFC) message that interacts with the pending message response, between the 'Send' and 'Enter' actions. It should not but it does, obviously.
The HP71 sequence 'OUTPUT 1;"B2" @ RESTORE IO @ ENTER 1;A$' fails too.

I just corrected this aspect in ILCtrl v1.04 on my site. Now the calibration data can be read easily with a couple of keystroke in ILCtrl (ok, this is much less fun than setting a HP41 system up :-)

Quote: (Still not sure how I'd write it back if I had to, but perhaps the B3 command followed by the data would work from ILCtrl, since a response isn't needed.)

ILCtrl should be able to write back the cal data, but I didn't check.

J-F