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Display SD card memory on screen

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  • MVP 2023

You should understand that the number calculated in sdw59 is not the remaining volume, but the volume expressed in elementary particles of 512 bytes.

Therefore, first put the number of sdw59 with a huge (maximum number of digits) length on the PLC screen.

Then, after seeing what you got - multiply it by 512 bytes (start with a simple calculator) - you will have a number that corresponds to the free space in bytes.

It is number that you must convert into megabytes and then gigabytes and display on the screen.

By doing all the listed actions hidden in the program, you should get what you want in gigabytes. However, there is a problem - whether the numbers with which you will work will overflow.

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