configuring estop_latch

I have a 5i25/7i77 combo that I'm using in a retrofit bridgeport clone. I'd like to implement the estop circuit like in example 4: wiki.linuxcnc.org/cgi-bin/wiki.pl?Sample_HAL_And_ClassicLadder

I'm told that the estop_latch component works this way. I'm trying to understand how to make this work through pncconf without hand editing the main .hal file.

I've added the following to my custom.hal file but since iocontrol.0.emc-enable-in is already linked to estop-out it fails. Any suggestions?


# estop
loadrt estop_latch
addf estop-latch.0 servo-thread

net estop-loopout iocontrol.0.emc-enable-in <= estop-latch.0.ok-out
net estop-loopin iocontrol.0.user-enable-out => estop-latch.0.ok-in
net estop-reset iocontrol.0.user-request-enable => estop-latch.0.reset
net remote-estop estop-latch.0.fault-in <= hm2_5i25.0.7i77.0.0.input-00-not

Here is how I did it with my 5i25-7i77 set up. I did use pnc config but I don't remember if I modified this part by hand. I think I did change something but I can't remember what.

net estop-out hm2_5i25.0.7i77.0.0.output-02
net estop-ext <= hm2_5i25.0.7i77.0.0.input-14
net estop-out <= iocontrol.0.user-enable-out
net estop-ext => iocontrol.0.emc-enable-in

I ran the wire from the above 7i77output to my e-stop switches, then on the other side of the e-stop chain, I connected 2 wires one that went back to the above 7i77 input, and the other one to a series of relays and contractors that shut off every thing I wanted turned off. This might not be the right/best way, but it is working well for me.

To use PNCconf to do this

on the advanced page select include classicladder PLC
check the estop program
make sure the include hal connections is selected.

You must select a input signal on the mesa page for this program.
select an input pin and select external control estop-in

and that should be it. when that input is false estop is on.

That page you referenced is VERY out of date (it actually says that) but the ladder program is the same.

Chris M

No I hadn't - I'm behind the times