I am trying to sequence outputs so that 16 relays will come on one after another. At the moment i have 16 timers controlling the outputs but wanted to see if there is a way to simplify this. Here is the program and the the light_timers subroutine is where the relays sit. Thanks guys.
Sequencing Outputs
- Thread starter icehube
- Start date
Mickey
Lifetime Supporting Member
I can't view your attachment ( don't have RSLogix5000), does the first light turn off when the second comes on and so on?
Use one timer and compare or limit instructions to compare the timer's ACC value.
Use one timer and compare or limit instructions to compare the timer's ACC value.
Mickey
Lifetime Supporting Member
See my above post.
Then Equal to or greater then (1) turn on light one.
Then Equal to or greater then (2) turn on light two.
...........
Ken Roach
Lifetime Supporting Member + Moderator
I do that as a demonstration of the power (and the danger) of Indirect Addressing.
Local:4:O.Data.[BitNumber]
-----------------------( )--
Local:4:O.Data.[BitNumber]
-----------------------( )--
electrical_geek
Member
I would use this solution. A counter and then use the counter outputvalue as condition for the different relays
widelto
Member
Ice: Thar´s the way your program is done, to tell the truth the do not get on at the same time, but your preset times are so small that they seem to turn on at the same time,do not forget they are expressed in milliseconds. If you change them to several seconds you will see the difference.
I would use SQO, may be it takes a bit to set up data table but once is ok no problem after all.
Logical_Data
Member
Could use a sequencer. We sometimes use them for "practice" making the indicators come on, on output cards on a SLS to leave "messages" for each other. hehe
Would work just as well there for what you are doing if I read your project correctly.
Would work just as well there for what you are doing if I read your project correctly.
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