Hello

I have a CPu s7300 6ES7313-5BF03-0AB0, i see the sucessor product of it is 6ES7313-5BG04-0AB0

so can i replace old CPu with new different version CPU without changing program.

Hi,

https://support.industry.siemens.com/cs/ww/en/view/50105638

In the case of a spare part replacement:
If a CPU (e.g. 6ES7313-5BF03-0AB0) is replaced by a compatible follow-up type (in this case 6ES7313-5BG04-0AB0), the STEP 7 project need not be changed. It is also not necessary to upgrade the STEP 7 software.

When you employ a compatible follow-up type, you can always work with the order no. of the predecessor type in the STEP 7 project.

Configuration with older software versions:
If the new functions are not required, the module can be configured in STEP 7 as predecessor type with the latter's scope of functions. The larger work memory and the improved performance are nevertheless available.

It is not necessary to upgrade the STEP 7 software in this case either.

Regards

Christoph

Hi,

To our friends reply i would like to add pls take care of the memory card when u replacing the cpu..will it be compatible with the new one or not

BALAKRISHNAN92

Hi,

To our friends reply i would like to add pls take care of the memory card when u replacing the cpu..will it be compatible with the new one or not

this is not necessary. As you can see in following FAQ, both CPU313 can work with every Simatic MMC with max. 8MB. 

Which memory cards can you use with an S7-300 CPU?

you can also see in the delivery release of the new CPU, that it is compatible with all existing Simatic MMC:

SIMATIC Micro Memory Card (required for CPU operation)
The following types can be used:

hope this helps,

regards,