TIA Portal: The four different PLC Memory Areas

RAM and ROM? More important is what we do with that!
Here is the answer!
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[vinothparker]

I think you are only one putting different videos which are not already available on the internet.. keep going sir..

[acth]

104 bytes of 172 bytes is because of "Download without reininizilation" property. All data blocks come with 100 bytes (and additional 4 bytes) memory reserve as default. But you can change this setting by Properties of the block or by Settings >> General >> Download without reininizilation as default.

[alexyousefian]

great explanation on a topic that is frequently misunderstood, nice clear explanation!

[MohammadRezaMokhtari_Robin]

Thanks for this video. It is great also to have a video on how to select the right PLC (in terms of memory) based on the size of the project (# of I/O as well as complexity!). I highly appreciate!

[abdulrahmanbin-mahmood]

Super nice video, by the way it is important to know these information to work professionally,

[JinsonKurianVJames]

Thanks for video.
Much appreciated.
Expect more videos.

[neiljolliff]

Great... Helped me identify a low memory warning because I hadn't specified a memory card size in the resources tab for my ET200SP. This fault condition prevented program download so it must be set correctly especially for large programs. If none is specified then 4mB seems to be the assumed size. Thanks

[patilvikranta]

You are doing great, keep up the good work, this is really helpful video for new learners

[sahalasolusiindustri]

Awesome video tutorial, Would you make video about retain memory PLC, How to register data retain memory? thank you

[d.militomilito]

Thank you for sharing your knowledge, I appreciate it too much.
What about the process image and memory of the physical inputs and outputs? Are they in these categories?

[JinsonKurianVJames]

Hi Philipp paus, I have one question, if size of the program is higher, why do we need to change PLC? We can add a memory card for the PLC 8MB or higher?

I have one more question, when program downloaded to PLC, where do it store? Memory card or internal memory?

If memory card remove, do PLC program work?


As far, I have ordered Simatic memory card for all my projects.


One tip, memory card should only format with PG or siemens card reader. If format with normal laptop can damage it.

[robreis]

What type of computer do you have? (Specs) Wow it runs portal fast!!!

[zkfa]

Gute Arbeit, mein Problem ist häufig einzuschätzen wieviel Zykluszeit das Programm brauchen wird. Kann man die Zykluszeit simulieren? Wenn du z.B. 40PN Teilnehmer hast Mit F-PLC wird es langsam echt schwer einzuschätzen welche CPU man benötigt und auch teuer und Zeitaufwendig wenn man daneben liegt, egal in welche Richtung. Hab mal ne neue Anlage gemacht mit damals der ersten f-cpu bei uns im Werk + komplett neues Programmstruktur. Am Ende hat die CPU gerade so gereicht, Zykluszeit war am Limit mit um die 50ms. Hab extra schon 2 Stufen höher gegriffen als unsere damaligen Standard CPU 314C war es dann eine 1516F.

[mortenlund]

Does different languages use different memory space for the same tasks. Eg. Lad vs. Scl?

[djencore]

Great Video, I have a question regarding the s7-1200, when I select one input as retain selects all the variables in the data block, is this normal or is there another setting that needs to be changed.

[ChrisChristou]

Did you notice that after you increased the retained integers from 1 to 3 the data work memory went from 182 to 178 (six bytes less)?

[santoelectron]

#hegamurl so when you check the spec of a specific PLC for example one that says ● integrated (for program) 225 kbyte, ● integrated (for data) 1 Mbyte.
I know that Load memory is linked to the size of the memory card. But what about all the memories you talk about? Which ones are "for program" and which ones "for data"

[jbn]

Thank you for this video! Regarding Load Memory, should I understand that if we insert a memory card, then the program will be downloaded on the memory card by default? Is it still possible to select to be downloaded on PLC internal memory?

[bestyav]

Onw thing Sir, a plc program can be in terms of Giga in your PC but how come that big code still goes into a small MMC? Example 1Gb plc code you wrote in your pc and get loaded into a 32Kb MMC . How to explain that?

[ParideFioretti]

Great explanation very useful! many Thanks