Plc Siemens Programming

[Jarvarious Hunsaker]

HelloI have been programming siemens PLCs for 2.5 half years now for industrial solutions, but I have never really found any coherent information on a "Best Case" for how to program alarms on a PLC and integrate them to the Comfort HMI.

My solution to this issue was to program an FB that moves a Bit sequence of 128 alarms (Array of 128 bools) and a bit sequence of 128 reset bits into an array of 16 words acting like the alarm and reset bits in the HMI.

I feel like this works quite well in practice, but I wanted to see what other people use in their solutions and if there is a "Correct" way of doing alarms or an industry standard or something similar.

We use quite a few 1200 PLCs as well in smaller basic projects and was wondering if anyone knows any good concept for Alarm handling in a 1200 CPU. I know that the 1200 series is quite limited on possibilities compared to a 1500 though.

Thank you for the help, but this is not what I am looking for. This document does not really discuss programming alarms in 1200 PLCs, only generating user diagnostics which is not exactly what I am looking for.

I'm not using siemens hmi. I searched and tried a lot. Want my simple alarms as bits packed in a word without using merkers or abs addressing ('non-optimized'). Tried a lot, gather/scatter needs full 8/16/32/64 bits. Don't like arrays of bools. Can't get AT construct to do what I want... UDT, oh my...

I'm now setlled on a fb with bools that cpy's to dword-bits with slice access. Only I' can't define the slice access symbolic. That something so simple can be so complicated, I guess we can't stop 'progess'...

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I just got my Siemens Pure 700 and am would be willing to pay a decent penny to get my hands on a programming cable + software (I beleive you can download the software online but where where can I buy a programming cable)?

Thank you. I think I have found a cable on ebay. However, I read the thred and people talk about some hi-pro box, any idea what that is and if it is needed or optional in order to program the Siemens Pure? Looks like the software is available for download online, correct?

Yeah, but $7000 is even more expensive for new hearing aids. You think the industry wants to make the connections standard/easy for the masses. Think again. They are heavily invested in keeping the status quo.

hi every body the cbles are available in india with lower prices than the ebay. ebay prices i have seen is more 240$ plus shipping charges, i know the prices for all hearing aids like SIEMENS,RESOUND,OTICON,BELTONE REXTON,ELECTON is only one cable model for all of them and it costs not more than for pair left and right 160$.with shipping charges any were in the world,accessories are still less 10dollars only, you can mail to to the indian supplier farh...@yahoo.com and ask them the price of all company cables .software cd is free of cost but copy right cd.try there .you could save some money.

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To put it plainly programming PLCs whether you're using Ladder Logic, Structure Text, Instruction List, Sequential Flow Chart, FBD, or Continuous Flow Chart isn't the same as programming software in a language like C++, Java, JavaScript, etc...

Simply put, there is not one set of "best practices" that fits every use case. The reason for that is, because unlike your standard software development which you can apply principles like the SOLID principles to always make your code easier to read, maintain, and extend. PLC programs are associated with a very real physical process and physical machinery. Often times what you find in the industry is that every plant/manufacturer/facility establishes their own set of best practices given their facilities needs and process.

Scenario 1:The logic used to run the distillation process for a small local brewery may include sub-routines or even a loop. They may allow 5 or less warnings in their code, and allow a few unused tags. That is totally fine, because they are making beer, the process isn't critical, a bad batch won't kill anyone, and they only have 2 pumps that their using the logic to iterate over. So if there is a problem that needs trouble shooting the logic in the sub-routines or loop won't be too much of a headache.

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