Display SD card memory on screen

[__sub__g]

My program is saving CVS file. I want to display the memory of the SD card in HMI. (E.g., 2 Gb used from 4 GB) Is there a way to do that?

Any help would be highly appreciated

[kratmel]

You can try to use SDW59

SDW 59

SD Card: Free space (bytes)

Capacity given in 512-byte chunks. The value is written when SB 217 turns ON, and is updated at each write operation. The operand is reset when SB 217 turns OFF.

Initialized at Power-up.

[__sub__g]

@kratmel thank you for your help.

I tried to use this in program but I got asterisk mark.(***)

[kratmel]

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.

[__sub__g]

[Flex727]

That will NOT work. You will overflow your MI. Use DWs.

[__sub__g]

@Flex727 thank you for your help