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creating program for replacing mechanicl cam timer switch with OBA5 logo

Created by: lost in kansas at: 8/1/2008 7:58 PM (6 Replies)

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8/1/2008 7:58 PM	Rate (0)
lost in kansas Posts: 3 Rating: (0)	I have been trying to create a program to replace a precision cam timer with a Logo 0BA5. The program will operate 6 outputs controling hyd valvesone at a time in sequence each with a different on time with the second turning onwhen the preceeding one turns off. Then running in a loop until stoped with a reset signal.Also need to independently reset 3 of the valves to a start state when a home signal is inputted. Have tried using the set up in the August 2000 Applications for all sectors of industry and trade manual but hav been unable to make it work It is on page 72 and 73 in manual. Lost in Kansas Any help would be appreciated
lost in kansas Posts: 3 Rating: (0)
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This contribution was helpful to 1 thankful Users Birgir Björnsson

8/2/2008 7:12 PM	Rate (0)
Darren_T3 Posts: 95 Rating: (10)	Howdy Neighbor Lostin Kansas, I am wondering if the Shift Register would not get you headed in the right direction with the sequence you are looking for. Each of the Shift Register Bits could trigger a sequence for you. I am sure you will get other responses but wanted to offer my two-cents. Cheers, Darren In Dallas (In Buffalo) PS: Just head South and you will be in Texas befor long...
Darren_T3 Posts: 95 Rating: (10)
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8/2/2008 11:23 PM	Rate (0)
Toeternietoe Platinum Member Joined: 12/27/2006 Last visit: 8/18/2024 Posts: 1197 Rating: (113)	Is this something you want?? Attachment volgorde1.zip (753 Downloads)

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8/5/2008 1:01 AM	Rate (0)
lost in kansas Posts: 3 Rating: (0)	Toeternietoe, Yes this what I am tring to do. With the program I am working on I need to stop the sequence anywhere in time if there is a hydraulic hose break or a worker gets where they are not supposed to be. I also need a third input to return three of the outputs to there original start so that the machine can be started in a safe manner. If I were to put in time offdelays following the time on delayswould this be possible as they can be reset independently. Thank You for your time Lost in Kansas
lost in kansas Posts: 3 Rating: (0)
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9/6/2008 4:10 PM	Rate (0)
Thumper Posts: 62 Rating: (19)	Greetings lost in kansas, Look at the standard counter instruction. It has an on preset and an off preset. That makes it a single cam. If you drive a stack of these with a single pulse output, you have a cam timer thats as wide as you want. Then set the output cam action using the on and off presets. At the end of the sequence you can restart the cams using a common reset. The accuracy is limited by the speed of the timer and the number of counts. Best Regards, Thumper
Thumper Posts: 62 Rating: (19)
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9/6/2008 8:41 PM	Rate (0)
rosa Posts: 191 Rating: (58)	Hi!! this is an example of Thumper´ssolution using counters... ¿¿ is this what you need ?? ROSA Attachment counters.zip (773 Downloads)
rosa Posts: 191 Rating: (58)
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9/15/2008 3:22 AM	Rate (0)
lost in kansas Posts: 3 Rating: (0)	Rosa, I thank you for your work. I do not understand timers but with your example i think can make it work as i need it to. Will let you know how i am doing when I have time to work on it some more. Thank You, Lost in Kansas
lost in kansas Posts: 3 Rating: (0)
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