Jon is right, you cannot. Unless you are running pre-2.2.x EMC2. Quote from
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?UPDATING:
3.4. double-linking of pins is now treated as an error
halcmd and hal_link() now refuse to link an already-linked pin. This
immediately diagnoses configuration errors of the form
net limit-switch parport.0.pin-26-in => axis.0.neg-lim-sw-in
axis.0.pos-lim-sw-in
net home-switch parport.0.pin-26-in => axis.0.home-sw-in
which have the effect of leaving no pin driving the limit switch inputs. If the
"re-link" behavior is truly desired, add "unlinkp" commands before the new
link. It is still permitted for "unlinkp" to be used on an unconnected pin.
Lesson learned: Never upgrade a working machine.
-----Original Message-----
From: Jon Elson [mailto:[email protected]]
Sent: Friday, July 23, 2010 11:33 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Assigning 2 signal names to 1 pin
Kirk Wallace wrote:
> You may have only one output pin attached to a signal name (or think of
> a signal name as a wire name), with one or more pins attached that
> accept input. There can only be one boss per signal (or wire). You
> should be able to assign a single output pin to more than one signal
> name, as long as there are no other pins that can create output for each
> signal.
Apparently, you cannot! I don't know why, but I am guessing that the
internal HAL logic does not process signals, it processes PINS, and when
running through the list of pins, there is only one signal assigned to
each output pin.
Jon
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