Siemens OP7 program

We have a machine that is using a 313C plc processor, connected
through Profibus (I think) to an OP7 HMI. I need to change the way some of the numeric data is dislayed on the screen (rescale these values), and also to change some of the text on the LCD display. I do not have the
OP7 source file, but I do have the PLC source file. Am I out of luck? Will I have to write another OP7 file, or is it possible
to do necessary changes in PLC?

I think you are out of luck. I don't think you can upload from an OP7. I'm not sure on the newer OP77 if an upload is possible.


Merry Christmas! Or Happy Holidays to be politcally correct.