Hi Everybody,

My system includes 1 PLC S7-300 (CPU315-2DP), 1 CP343 (6GK7 343-1GX11-0XE0), 2 module DI32xDC24V and 1 module DO16xDC24V/0.5A.

When I upload program from CPU315-2DP in this system to PG, an error appears “Module (CP343-1 IT): System error SDB upload: The Internet symbol list could not be reinterpreted.” (as attached picture).

Please show me how to fix this error.

Hello Joseph,

it could be a version conflict. The appropriate solutions are described in the FAQ:

What options are available in STEP 7 (TIA Portal) for uploading when the project version in the CPU no longer matches the version on your PG/PC?
https://support.industry.siemens.com/cs/ww/en/view/97554052

Otherwise, I recommend creating a new project and uploading to the new project.

There is also the FAQ:

In STEP 7 (TIA Portal), how do you load the "Program Blocks" with the PLC tags and PLC data types from the CPU into the programming device?
https://support.industry.siemens.com/cs/ww/en/view/41885693

With best regards
Cicero