big_n

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About big_n

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    Hi, I am New!

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  • Country Canada
  1. Hi Everybody. I'm looking at a machine that requires a fair bit of safety programming (to meet EN954-1 CAT3 or CAT4). I want something that will let me program using both function block diagrams, and good old traditional ladder. This PLC will handle all of the machine safety requirements, and will integrate with the existing machine controls. The ladder will be mainly used for the integration portion, but will need to handle some of the safety portion as well. The FBD will be primarily used for safety. I have about 80 safety inputs, 10 safety outputs, and about 8 regular ins and 8 regular outs. I would also like to have the option of annunciation to a small, but decent, screen for basic fault diagnostics. I know that Siemens has a couple of options - looks like the CPU315F would work well (I have just started to look at them). Does anybody know of any other vendors out there with similar options? I could also use FBD's to do all of the programming as well, but I need something that will allow for a large number of FBD blocks, and have a decent library set as well. Some of the safety plc's I've seen will only handle a couple of hundred rudimentary type FDB's. I probably need about 500 or so in my logic. Any thoughts are greatly appreciated.