adccommunitymod (AutomationDirect) asked a question.
Sequencer
Created Date: September 12,2005
Created By: techapp
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I have a 205 that has 4 pushButton inputs that trigger 4 individual outputs. I need to log the order in which the pushbuttons were activated and turn on the outputs in that order. Each output will be on for X and when complete, the next one in order will energize. This will contiuously cycle and can be any combination or quantity. Any suggestions would be appreciated.
Created Date: September 12,2005
Created by: marksji
A little more info would be helpful. Are the four buttons used for 'programming ' one time and then not used at all? If so is there a fifth button that tells the PLC that it is in 'program ' mode? Also how does the PLC find out what 'X ' is (seconds, minutes, etc, value of x)?
I think this should be relatively easy using stage programming, but there will be some limit on the total number of steps in the cycle.
Created Date: September 13,2005
Created by: Doug_P
More questions.
From your description the sequence could consist of anywhere from one to four states. True?
Can a given output appear more than once in the sequence? Can it appear twice or more in succession?
Created Date: September 13,2005
Created by: techapp
I am using the D2-250 CPU.
The X is a contact input that confirms the current batch is complete and
go to the next.
The application is tank filling from four manually triggered sources. The
tank can handle only one batch at a time in whatever order they push the
buttons. Once all triggered have been dumped, the system will sit idle until a button or series of buttons are pushed.
The buttons will only set the order the tanks dump. Multiple pushes will not create additional dumps once initially set.
Not all four tanks will be used all the time.
Created Date: September 13,2005
Created by: ericn
This sounds similar to the application discussed in this thread.
http://www.plctalk.net/qanda/showthread.php?t=17054
-Eric
Created Date: September 12,2005
Created by: techapp
I have a 205 that has 4 pushButton inputs that trigger 4 individual outputs. I need to log the order in which the pushbuttons were activated and turn on the outputs in that order. Each output will be on for X and when complete, the next one in order will energize. This will contiuously cycle and can be any combination or quantity. Any suggestions would be appreciated.