Hello All,

I have a requirement to access the CPU Scan time and Load memory to my HMI.

anyone can please share the Program to access the above data from S7 400 PLC.

Thanks in Advance.

Hi Ajay5,

U can get scan time value in OB1 temporary variable declaration.

Thanks for the Valuable replay

In-fact i need to access CPU Scan time and Load memory .

Is there any FB or FC to Get that...?

Dear Ajay5,

You can read the work memory through SFC 51 as in Attachment 1.

But SFC51 could not help in reading load memory area as no index for load memory area.

Hope this will help.

Dear Mr. Thomas,

I have tried with SSL ID W#16#1B with Index 0.

But error of 8082 is appearing which is wrong SSL ID.

Any other options.

Interesting, as this is the SZL-ID which is requested from the Simatic Manager when you open the memory tab, where it's working and gets the results. You can find out which IDs are requested when you look at the traffic with Wireshark.

I've got the same on my 416-2 CPU. There are also other SZL-IDs which can't be read from the S7-program, I never knew that there is a difference in handling from inside and outside.