On March 18, 2015 6:29 PM Doug Kelly wrote: > On Wed, Mar 18, 2015 at 2:53 PM, Randall S. Becker > <rsbec...@nexbridge.com> wrote: > > On March 17, 2015 7:34 PM, Bharat Suvarna wrote: > >> I am trying to find a way of using version control on PLC programmers > >> like > > Allen > >> Bradley PLC. I can't find a way of this. > >> > >> Could you please give me an idea if it will work with Plc programs. > >> Which > > are > >> basically Ladder logic. > > > > Many PLC programs either store their project code in XML, L5K or L5X > > (for example), TXT, CSV, or some other text format or can import and > > export to text forms. If you have a directory structure that > > represents your project, and the file formats have reasonable line > > separators so that diffs can be done easily, git very likely would > > work out for you. You do not have to have the local .git repository in > > the same directory as your working area if your tool has issues with > > that or .gitignore. You may want to use a GUI client to manage your > > local repository and handle the commit/push/pull/merge/rebase > > functions as I expect whatever PLC system you are using does not have git > built-in. > > > > To store binary PLC data natively, which some tools use, I expect that > > those who are better at git-conjuring than I, could provide guidance > > on how to automate binary diffs for your tool's particular file format. > > The one thing I find interesting about RSLogix in general (caveat: I only have > very limited experience with RSLogix 500 / 5000; if I do anything nowadays, > it's > in the micro series using RSLogix Micro Starter Lite)... they do have some > limited notion of version control inside the application itself, though it > seems > rudimentary to me. > This could prove to be helpful or extremely annoying, since even when I > connect to a PLC and go online, just to reset the RTC, it still prompts me to > save > again (even though nothing changed, other than the processor state). > > You may also find this link on stackexchange helpful: > http://programmers.stackexchange.com/questions/102487/are-there- > realistic-useful-solutions-for-source-control-for-ladder-logic-program > > As Randall noted, L5K is just text, and RSLogix 5000 uses it, according to > this > post. It may work okay.
A really good reason to use git instead of some other systems is that new versions of files are determined by SHA signatures (real differences) rather than straight timestamps. So saving a file that has not changed will not force a new version - unlike some systems that shall remain nameless. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
