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S7-300 PLC program reset on specific date

Created by: mehr at: 7/9/2008 9:08 AM (3 Replies)

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7/9/2008 9:08 AM	Rate (0)
mehr Posts: 6 Rating: (0)	We have purchased one machine which was programmed ( PLC S7-300 ) by one Engineer. After one year its programmed become reset. Than we call that engineer and again he do some changes in programe ( may be he set the next intrupt date). How i can remove or change the intrupt date in PLC S7-300by using SIMATIC S7 V5.3program ?
mehr Posts: 6 Rating: (0)
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7/9/2008 5:10 PM	Rate (1)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 11/14/2024 Posts: 4352 Rating: (1452)	Hi, there isn't any system tool to do it automaticaly. So, he does that with user software. User software is very personal, and can assume many many variations. You need to look and understand the user program to find where and how he does it. Some suggestions: to do a time event, he needs either: -Program OB10 to 17 or -Read the clock with SFC0/1 or -Read time from temp variables of OB1. -Read elapsed time with SFC64. -Do some calculation from cyclic OB (OB3x) to stop the CPU he needs to call SFC46 or do some error (like access adress error).
	Denilson Pegaia Siemens Industry Sector Technical Support
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7/10/2008 12:20 PM	Rate (0)
mehr Posts: 6 Rating: (0)	Dear, I would like to add some more infromation regarding previous problem. PLC S7-300 CPU status was on RUN LightON. All Input was working , If wepush anyinput button , it shows (Green light Illiuminate) on PLC input Module. But allPLC Out Put Module show no output / nooutput green light illiuminate. After 3 days same problem occured with another machine PLC S7-300 . And for your information both machine was programmed by thesame Engineer.
mehr Posts: 6 Rating: (0)
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7/10/2008 11:32 PM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 11/18/2024 Posts: 4113 Rating: (195)	closed cause question posted twice. The second thread with the subject S7-300 PLC program reset on specific date is published withinthe conference STEP 7 / STEP 7 Lite Best regards CS Moderator
	Last edited by: O_Moderator at: 3/17/2010 11:16 AM conference-link edited My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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