Posts by millerm213049
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I am not a PLC programmer but I do know some about PLC. My preference is Allen Bradley. Between That and Siemens, Allen Bradley seems much more user friendly. Of all the plants I have worked in, the majority have used Allen Bradley. But if you are familiar with Siemens then that might be the route to go for yourself. You can get the same end result with both. It's just a matter of what you are comfortable with since you will be doing the programming yourself. As far as communication, that is an area that is not my strongest. Again, what I have seen in my experience, is devicenet used with Allen Bradley PLC. When using devicenet I have seen minimal problems. Since my experience is limited in my aspect, that is the best I can tell you. There may be more efficient way but I'm not aware of what they might be. I hope this helps!!!
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I have worked with Fanuc for several years now. But one area I feel I am lacking is knowing the variables. As I am sure you all know, once you get into the variables menu the possibilities seem endless, at least for me. I have never been able to makes any sense of the variables or where to look for something when certain issues arise that may involve a variable. I suppose more than anything, the naming convention doesn't seem to always say "Hey,Look here!". So I guess what I want to know is, is there some rhyme or reason to the naming conventions? Or perhaps, is there a site or manual that can break it down to make it a little easier to understand? Thanks for any help in advance!
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Very true. Thanks again, everyone, for the info.
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And what about the proper use NUM?
I know these may seem like simple questions, but they are ones I have never asked or had any reason to. I am now about to start on a massive ABB project and I am trying to make sure I am prepared for what ever may be thrown at me.
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Thanks for the information. It makes much more sense now that I know that.
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Do these particular Fanucs use PMC?
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Are you referring to getting an output to the PLC? When you set up your DCS a safety signature is produced. That signal is usually implemented into the PLC as part of the safety circuit. If you make even minor changes to the DCS parameters the the signature will change and effect what output the PLC is seeing if they do not change the signature on there end.
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How is it not working properly? Is the fixed tip not touching to metal at weld points?
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What exactly do you want to know about the control? Typically, as I have seen it, The external axis for a servo welder is a separate mechanical unit that can either be activated or deactivated. But in order to open an close the gun you will have to have the separate mechanical unit activated and selected to do anything.
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I have been in the industry for several years now and have worked with ABB IRC5 off and on over the course of this time. I work mostly in automotive plants, and for the most part all software and offline programs are already loaded into the robots with robtargets already created. And since they are already created they are already declared as VAR, CONST, or PERS. As I am trying to better myself as a programmer I wanted to know the difference between the three (3), VAR, PERS, and CONST. I know they represent Variable, Constant, and Persistent but I want a better understanding of what the exact difference is between all of them and when is it appropriate to use each. Any input would be greatly appreciated.