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Owain

Variables within LOGO!

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Hi all, Apologies in advance for how vague this question may be. I have a Siemens LOGO! unit, in which I need to program a relatively simple sequence. I have fleshed out the code in GX IEC Developer (where I am most at home) and I'm translating it into the LOGO! I'm brand new to the LOGO! units, so be nice. I have fallen at the first hurdle. I am using a "step count" whereby if the variable "StepCount" equals 1 then enable Output n, on completion of timer T00n move 2 into StepCount. What I can seem to find is a simple variable to hold an integer. There is a lot of skipping between say step 6 to step 2 for example, so I would rather use this method rather than classic logic. In short, is there a way to use (local) variables and comparators in the LOGO! software? Or even a workaround? (Apologies for my terminology, I'm mostly self taught) Kind Regards, Owain

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Please find attached an example of the ladder I would like to translate.... Even just a description of how I might do network #1 would help. Or, what I'm expecting... Someone to tell me it can't be done... Ladder.pdf

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Logo isn't a PLC, so it doesn't have the same level of memory storage a PLC would. The manuals are available at www.siemens.com/logo. They detail what addresses exist. And it varies based on the revision of the Logo you are using. The last digit of the part number indicates a generation, starting at 0 for first generation. I have used the 4th generation, and don't recall there being numeric storage addresses inside it. They also offer a book full of sample programs. They seem to be having some web problems right now, can't get the pages to load.

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