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i am writing here regarding my Simatic S5-95U i found lots of difficulty to write a program , i would like write a control program to control a motor start and stop with sealing contact, i have written the program but when i tried to run it by making contacts open and close my program does not work. i have been trying to run my program but i am not able to do that, if there is any body who can help me for that i am so glad to hear from any one who has a good idea about step 5 programming. A copy of my program is attached, you'll need AUTOCAD to view it.