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How do you calculate a time between two steps?

9/9/2008 3:07 PM	Rate (0)
romeo291 Posts: 18 Rating: (0)	I am trying to display a production time on my HMI. This time is calculated between two steps in an SFC. I've been testing with all the time-related blocks but can't seem to get any to work correctly. I need to display the time in hours and minutes. The time blocks output everything in milliseconds and there's not a conversion block to convert time to Real numbers for me to do math with. I've been trying to use the time difference block, but that block starts before I ever call it. I've also been trying to use timer_p and CTU blocks, but can't get it to work out correctly. Does anyone know of an easy way to do this?
romeo291 Posts: 18 Rating: (0)
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9/9/2008 3:57 PM	Rate (0)
Wizard Diamond Member Joined: 4/24/2006 Last visit: 7/31/2025 Posts: 9027 Rating: (1199)	Hello romeo291, Have you seen these links: http://support.automation.siemens.com/WW/view/en/26118578 http://support.automation.siemens.com/WW/view/en/27774290 Perhaps they are useful? Best regards, Wizard

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9/9/2008 4:06 PM	Rate (0)
Fatso Bronze Member Joined: 9/11/2006 Last visit: 3/17/2022 Posts: 168 Rating: (6)	Hi romeo291 Why dont you write your own Function block to do what you want,if youdont know how to go about it let me know

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9/9/2008 8:55 PM	Rate (0)
romeo291 Posts: 18 Rating: (0)	Hey guys, thank you for the replies. I ended up just using the TIMER_P and CTU blocks to get a timer to display. I think this should work, I have to run some tests first though.
romeo291 Posts: 18 Rating: (0)
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