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write a program

Created by: saeedplc at: 9/11/2011 7:28 PM (1 Replies)

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9/11/2011 7:28 PM	Rate (0)
saeedplc Posts: 288 Rating: (4)	hello. i need to write a program in s7-300 (ladder) as following: whenever the hydraulic(q0.0) turned on a timer became active and after 60minutes plc go to stop mode. elapsed time should be saved in retenvive memory. please help me. best regards.
saeedplc Posts: 288 Rating: (4)
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9/11/2011 8:52 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/12/2023 Posts: 10221 Rating: (1176)	saeedplc hello. i need to write a program in s7-300 (ladder) as following: whenever the hydraulic(q0.0) turned on a timer became active and after 60minutes plc go to stop mode. elapsed time should be saved in retenvive memory. please help me. best regards. Hello, The idea is to use SFC46 (Puts the CPU into STOP mode and thus ends program processing). Press F1 in order to use in built help in Step7. Use a positive edge in order to start the timer (again use a F1 help in order to understand which type of timer is needing there). About retentive memory and S7-300 take a look at http://support.automation.siemens.com/WW/view/en/598803 Best regards, Hristo Mihalev

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