Hi,
It can be done. Your S7-1200 is connected to a PC with Ethernet, right?
I never worked with cimplicity 7.X but I have solved many similar tasks before.
My plan will be to use Modbus protocol...If you choose we will get the result quickly.
Do you have TIA Portal v12 installed? (a software from Siemens for PLC programming)
A remote access to your worker PC will be required probably.
Thanks,
ilya