Can I use a C shell script for my PLC stuff?

I have a Hardinge HNC lathe that is 90% done.I realize I can use Classic ladder,a Comp component or a Python userspace script for plc coding.I have no desire to ladder program,so can I simply write my plc stuff as a C shell script and call it as a user space com[onent? Thanks.

Hi

As Andy says, userspace component is probably the way to go.

All you need to write is the C routine that does the actual job required, comp will add all the stuff to enable it to be loaded from a .hal file and have visible hal pins etc

In its simplest form, the userspace component just needs void user_mainloop(void) after the pin declarations, options etc..

user_mainloop can just contain a while(1){ } loop which does whatever you want it to each time it is polled.

All the normal C libraries are available, so it is far easier to write than a real time component in many ways.

regards

Userspace program for a PLC?

PLC stuff is usually realtime.

My initial idea was to write an executable shell script in the c shell( csh,like bash or ksh).It seemed like it might be easier than Comp and considering Python scripts work as user space components,it mighta been worth a shot.I have some previous retrofit experience with Delta Tau and I wrote two PLC programs for a Cincinatti lathe.One was estop,error messages and button functions,the other for the Duplimatic turret.DT scans for changes in i/o states and acts on the changes accordingly.I was thinking about just writing one long file with my turret,estop logic,fault conditions ect.Right now Im using some and/or functions to get things up and going.

I do appreciate that the HNC turret logic has been figured out and shared.Im a glutten for punishment and was gonna have a go at it myself,just for the learning experience.Im not hot on ladder programming and Classic ladder runs in userspace anyway.I was thinking about putting a reverseable two way solinoid on the lathe so the turret would be bi directional.

Thanks for all the input,I started writing the C component and will post some snippets...its a first and Im sure Im gonna get stuck!!.I posted some pics.....


if I can be of any help to any one,please ask!!!