adccommunitymod (AutomationDirect) asked a question.
help with fault situation
Created Date: July 23,2011
Created By: RonR399
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I have X103 & X105 if X103 is ON when X105 switches ON, then I need to throw a fault. if X103 is OFF when X105 Switches ON then no action is required. any ideas on how to solve this?
Created Date: July 23,2011
Created by: Philip Potts
Ron,
I'm not sure what you mean by "throw a fault " but what you describe is an "AND " situation. If X103 is ON AND X105 is ON then set an output ON.
Created Date: July 23,2011
Created by: RonR399
Ron,
I'm not sure what you mean by "throw a fault " but what you describe is an "AND " situation. If X103 is ON AND X105 is ON then set an output ON.
in this case I would turn an output off for a few seconds.
the trick is in the fact that it has to be based on Sequence.
I can do the AND situation ok, but i am having a problem with the sequence
Created Date: July 23,2011
Created by: Philip Potts
I think I see what you are saying: if X103 is on and then X105 is switched ON then ERROR; if X105 is ON and then X103 is switched ON then NO ERROR. Is this correct?
Created Date: July 23,2011
Created by: RonR399
I think I see what you are saying: if X103 is on and then X105 is switched ON then ERROR; if X105 is ON and then X103 is switched ON then NO ERROR. Is this correct?
100% correct!
Created Date: July 23,2011
Created by: RonR399
I am using the "click " plc
Created Date: July 23,2011
Created by: Do-more PE
I'll give this a shot. I think the below will work, but I don't have a PLC handy to test it with.
STR X103
ANDSTR X105
STRNOT C1
OUT Y1 (Fault)
STR X105
STRNOT Y1
OUT C1
Created Date: July 23,2011
Created by: RonR399
I'll give this a shot. I think the below will work, but I don't have a PLC handy to test it with.
STR X103
ANDSTR X105
STRNOT C1
OUT Y1 (Fault)
STR X105
STRNOT Y1
OUT C1
will the above work with a "click " PLC???
Created Date: July 23,2011
Created by: RonR399
I'll give this a shot. I think the below will work, but I don't have a PLC handy to test it with.
STR X103
ANDSTR X105
STRNOT C1
OUT Y1 (Fault)
STR X105
STRNOT Y1
OUT C1
I figured it out, I just used simple logic, it will work a little different
than in the LOGO! program but it will do the job!!
Created Date: July 23,2011
Created by: andremholmes
That should be an AND circuit. In ladder AND is series. If X103 is on & X105 then you get the result you mentioned. A NAND would be 2 NC in series
X103 X105 FAULT WHEN X103 AND X105 ARE ON
---------| |----------| |-------------()
This is a NAND
---------|\|----------|\|-------------(Y?)
Created Date: July 24,2011
Created by: RonR399
That should be an AND circuit. In ladder AND is series. If X103 is on & X105 then you get the result you mentioned. A NAND would be 2 NC in series
X103 X105 FAULT WHEN X103 AND X105 ARE ON
---------| |----------| |-------------()
This is a NAND
---------|\|----------|\|-------------(Y?)
yes, that is how it works.
thanks