Autonomous Classic Ladder?

Hello. 
Wondering whether CL can be run autonomously from outside LCNC? 
Can I have a standalone PC or Raspberry running a system as a PLC, for example as a controller for a pressure pump or a temp controller for a hardening/tempering oven for example without operating from within LCNC?
I think what I am asking is, is it possible to have a servo thread running a HAL file (a config) and running CL without the CNC layer on top?
And by extension, can I set up a PC such that say after a power failure it will reboot, then open CL and continue run the classic ladder file?
Thanks.

Yes. CL is loaded using halcmd commands.

halcmd is the user program that controls HAL. It doesn't need linuxcnc to be running.
usually we type 'halrun' while in a terminal to manipulate HAL from the command line interactively, but it can be made to run a file instead.

linuxcnc.org/docs/devel/html/man/man1/halcmd.1.html
linuxcnc.org/docs/devel/html/man/man1/halrun.1.html

Classic ladder is a separate application from linuxcnc it was integrated into linuxcnc few years ago and has not been upgraded since. If you would like the latest version streamlined for Raspberry check the following links:
github.com/cz172638/classicladder-1
sourceforge.net/projects/classicladder/

Any newer version of classicladder will not have connections to HAL.

but is possible start a gui like silverdragon and run only classic ladder without using axis? .... for example using sim parameters as motor?
In rhese way you can build a stand alone gui for classic ladder only.

regards bkt

I don't understand.
You can run classicladders's GUI all by it's self.