Hello !
I have a Simatic S5-100U CPU 102. but when i use Siemens step 5 to edit to programm, i can't do that !!?why ??, i can just see on line programm and can't force a inputs or outputs and memory variable in programm.and if i use PG 2000 Version 4.64 , i can change programm but i can't connect to CPU on line!!?
Do you know ,how i can to connect to Simatic S5-100U CPU 102 using a computer with com port ? and how to do that? and change programm and edit to programm on line? thank you