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counting the time of running motor

4/7/2011 4:51 PM	Rate (0)
rkymz Posts: 25 Rating: (0)	Hi all, i have a question about counting the run time of a motor, maybe it is so basic but i got stucked :) i have 2 motors running as backup of each other. i need to count the running time of motors and calculate the difference of the running times of two motors. if the difference for two motors is about 5 hours, i must stop the running one and start the other one. for example if motor 1 have been working for 10 hours and second motor have worked for 4 hours, difference is 6 hours, so the i must stop the first one and run the second one. how can i count the run time? with a timer or counter? thanks...
rkymz Posts: 25 Rating: (0)
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4/7/2011 5:44 PM	Rate (0)
miami Platinum Member Joined: 8/31/2005 Last visit: 12/16/2025 Posts: 2198 Rating: (331)	Use the system functions for the runtime meters: http://support.automation.siemens.com/WW/view/en/1214574 Additional informations: http://support.automation.siemens.com/WW/view/en/8460529 http://support.automation.siemens.com/WW/view/en/5504548 http://support.automation.siemens.com/WW/view/en/8460529 http://support.automation.siemens.com/WW/view/en/2804630
	Last edited by: miami at: 4/7/2011 5:44 PM
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4/9/2011 5:19 PM	Rate (1)
Marko Bursic Posts: 1410 Rating: (154)	I usualy use two timer for generating 1s cycle clock and increment a temporary int by each rising edge of clock 1s. When it counts 60s (1min) or 3600s (1h) or 360s (0.1h) , I increment hours meter dint, uint, ...which are stored in a retain DB. example of pseudo code: T0:=not(T1); // timers T0 and T1 onDelay 500ms T1:=(T0); if RUN then if T1 then seconds:=(secods+ 1) mod 60; if (seconds=0) then minutes:=minutes+1; end_if; end_if; end_if; Of course it would be simpler to make this code in ladder.
Marko Bursic Posts: 1410 Rating: (154)
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