Concept Error Message

Downloading of the IEC project in the 140CPU11303 has interrupted with the message:
Download program: PLC: variable or literal address offset > MAXOFFSET (-870)
How I can find this error in project?

Sounds like you have too many unlocated variables for your memory allocation. Depending on the version of Concept it's been called several things, but look in the "Configurator" and then "PLC Selection". There should be something called "Global Heap" or some variation of that - increase that size to make room for more unlocated variables.

I have solved a problem. The project is made in version 2.5. Then I opened it in 2.6. After that tried to load again in 2.5