All of the interlocks have an inactivity timeout that is driven by a current sensor. Once timed out, users need to re-authenticate.
This sensor typically indicates motor activity. For most of the machines this timeout is set pretty long (5-15 minutes.) Given that the ironworker hydraulic pump is what is sensed for the GEKA, and that it seems like it’s left on for the duration of normal use, I believe a much shorter timeout. I’m thinking 2-3 minutes is probably reasonable.
In the version I was messing with the motor current had a trim pot that let you set a current limit, can you set it so the “idle” pump is zero and the “working” pump is a 1? We did that for I think the Shark? because something was drawing a little bit of current.
In any case, I’d say err on the high side so you don’t annoy people and if we find people double dipping on the logins then we fix it to something lower.
The problem is that the working current can be as little as the idle current. The idle current is pretty high and you need quite a bit of load to get that up.
The current threshold setting has some slop. I don’t know how much so I’m reluctant to make it too critical a setting.