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I hope this thread can help beginners learns the basics of PLC programming on the RSLogix Micro software (because its free). And I hope more experienced engineers can show us what we're doing wrong and the optimal way to program for these simulated real-world systems.

So it's pretty simple, 1. Post a graphical representation and text description of the automation process to be performed 2. Post your PLC program written in RSlogix Micro. --------------------------------------------------------------------------------------------------------------------------------------------- Here's a simple mixing tank. RSLogix program. MixingTank.RSS When the RUN switch is activated Pump1 and Pump2 turn ON as long as the tanks are not full, when the tanks become full limit switch 1 and 3 close and turn off the Pumps.

Epson Lq 2500 Windows Xp Driver. Then (spring-return) solenoid Valves 1 and 2 open and release the contents of both tanks into the mixing tank, A timer keep liquid there for 120 seconds, then empties the mixing tank by opening Valve 3 until the empty sensor stops it. Metro A Responsive Theme For Phpbb 3 Installation. Program repeats cycle. This is the the first program I've written so probably not correct, Any help is greatly appreciated.

Other beginners like me feel free to post your programs in this thread and we can learn from each other. Edited 3 Oct 2010 by fresh.

Nice first post! I opened your program and noticed the first rung is incomplete. Perhaps you uploaded the attachment before saving your work? There's nothing to make use of the 'run' and 'stop' inputs. There are no conditions to start/reset the mix timer. For a simple sequence, I recommend using internal mutually exclusive bits to keep track of the 'state' of the machine, and those bits can then drive your outputs.

I took the time to write you an example, using your I/O as a start. I noticed you had a symbol name for ouput 5 that I believe is supposed to be an input so I changed that, and incorporated several basic methods in the revision that should give you some things to think about. MIXINGTANK2.RSS Edited 3 Oct 2010 by OkiePC. OkiePC did a great job showing an example of a structured program based on your input.

Another example of items he addressed: in rung 1 of your program think of what will happen as tank 1 is being emptied into the mixer tank. The 'Tank Full' switch will no longer indicate full and Pump 1 will turn on even while the tank is trying to empty. In rung 3, the Tank Full switch turning off will close the emptying valve until the tank reaches full again then it will start over. In other words Tank 1 (and Tank 2 in the same manner) will never empty fully. It will just keep emptying slightly until the Full switch releases then start filling again until the Full switch is made. A rather interesting version of an oscillator but probably not what you wanted.

OkiePC shows that the program must be divided into steps. Each step embodies one of your 'do that until this happens' statements. The 'until this happens' is the trigger to stop doing this step and start doing the next. There are a number of ways to do this and OkiePC shows one excellent way. Have a great time with PLCs. Greetings I am new here and have some experiencs with old GE fanucs and a Couple lines of the allen bradley family as well as some of the cheap micro controllers. I just got slated to head up a project where I work, a small plastic extrusion company to design and install a scada system for 4 water tank level and temperatures and 3 gearbox temperatures 3 points each gear box. How To Download Photos From Canon Camera To Macbook here.