Turning on a HP 41 with the HP IL module plugged

[J-F Garnier]

(05-17-2020 08:14 PM)aurelio Wrote:  

(05-17-2020 07:19 PM)Sylvain Cote Wrote:  Normal delay when the loop is broken or when a device on the loop is powered off.
If you have no device connected, connect the two cable end together so the loop is closed.

Edit: Didier beat me to it.

Now I have the controller (HP41) + HPIL module + PILBOX connected to a PC, no emulators, and the calculator turns on regularly, it means that just the phisical loop must be closed ?

I got, last time, the problem leaving the calculator connected to the PC after a session of the PYIlPER, and turning it on

With the PIL-Box, a "closed loop" has a slightly different meaning.

When the PIL-Box is powered up, it justs re-transmits the HP-IL traffic to the controller (the 41C), so the loop is closed.
But when an application on PC initializes the PIL-Box, the PIL-Box starts to re-transmit the HP-IL traffic to the PC. If the application doesn't reply for some reason, the loop is "broken".

With the regular ILPer, the PIL-Box is put back to simple re-transmission on HP-IL side when the application terminates, so the loop is still "closed" when the application has ended. I don't know for pyILPER.

J-F