Hello 

I have a question about memory ranges of timers, counters, M and V in s7 1200 as I can find in memory ranges of s7 200 as shown in attachments.

Hello Mahmoud;

The memory allocation works a bit differently with S7-1200 CPUs.

Each CPU has a range of Flag memory available, either 4kbyte or 8 kbyte, depending on the module. See ths link for the technical data of a CPU 1214C, check the line marked Flags.

https://support.industry.siemens.com/cs/ww/en/pv/6ES7214-1AG40-0XB0/td?dl=en

Now read the screenshot below, taken from the S7-1200 system manual.

https://support.industry.siemens.com/cs/ww/en/view/109759862

Each time you create a timer or counter you take an amount of bytes from the Flag area, of course M bits are located in the same memory range. So you simply have to take care you do not exceed the Flag size limit in your program.

Hope this helps,

Daniel Chartier

Hi Mahmoud,

You can check S7-1200-easy book for details. 

https://support.industry.siemens.com/cs/ww/en/view/39710145 

And what you asking is in the attachment.

Rate it if this helps you.