selecting the outputs

Hi guys,
i am useing STEP 7, siemens PLC 313C and OP7. I got a question for you. It is possible to select which outputs are used on the OP7 and transfer the message to he PLC so that the selected outputs will change the state according to the program?

If I understand your problem correct you want on the OP to choose wich outputs are changed in your cpu. It should be possible if you use indirect adressing.

Make an input-field in your OP were you can type a number. This number is saved e.g. in 'MW' in your cpu. This 'MW' can be used for an indirect adressing of an output/outputs.