Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

how to use only one push button to on/off the output

Created by: Kutti at: 9/13/2010 5:30 PM (12 Replies)

Rating (7)

Thanks 10

Result pages:: |; 1 | 2; |

13 Entries

Entries per page: 10 | all

9/13/2010 5:30 PM	Rate (0)
Kutti Posts: 41 Rating: (0)	hi guys, please guys anybody tell me how to use only one push button to on/off the output in S7-400. regards, Kutti
Kutti Posts: 41 Rating: (0)
Suggestion To thank Quote Answer

9/13/2010 5:48 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 4/11/2021 Posts: 10581 Rating: (2243)	Hello Kutti; What you are aslking for is a "toggle" signal, or a "flip-flop" logic. You can search for these terms on the forum, and see what other members have asked on these subjects abd what help they recieved. For example, there was an interesting discussion recently involving memebers IBN-Service and Fritz: Bit toggle in S7-300: /tf/WW/en/Posts/46539 There are also flip-flop instructions built in the Step 7 instructions, namely RS and SR, in the bit instructions. Hope this helps, Daniel Chartier

Suggestion To thank Quote Answer

9/13/2010 8:48 PM	Rate (0)
UMENCHO Diamond Member Joined: 3/21/2006 Last visit: 4/9/2021 Posts: 10220 Rating: (1160)	Hello Kutti, Or to use Daniel' explanation from Help me ! thread. Best regards, Hristo Mihalev

Suggestion To thank Quote Answer

9/15/2010 6:19 PM	Rate (3)
bit7 Advanced Member Joined: 7/26/2008 Last visit: 3/30/2021 Posts: 41 Rating: (9)	Hi Umencho, the shortest code I have come across for this is: A I 0.0 FPM 0.0 X Q 0.0 = Q 0.0 You can test the code with PLCSIM and see if you agree.

Suggestion To thank Quote Answer
This contribution was helpful to 2 thankful Users AlexG68 Stylle

9/16/2010 8:45 AM	Rate (0)
bidnetvåga Posts: 6 Rating: (0)	Relly neat coding Almost embarrased that I haven't figured this one out myself after xx years of PLC programming
bidnetvåga Posts: 6 Rating: (0)	Last edited by: bidnetvåga at: 9/16/2010 8:46 AM
Suggestion To thank Quote Answer

8/29/2012 12:39 PM	Rate (1)
GaJEnDrA D S Bronze Member Joined: 8/9/2011 Last visit: 2/12/2021 Posts: 300 Rating: (18)	Hi all My aim is to control Q bit. I have checked and it works?? Attachment New Bitmap Image.JPG (3900 Downloads)
	"Any intelligent fool can make things bigger, more complex. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.":):)
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users Snody87

8/29/2012 9:03 PM	Rate (1)
bit7 Advanced Member Joined: 7/26/2008 Last visit: 3/30/2021 Posts: 41 Rating: (9)	Hi Gajendrads, it is not necessary to lose the elegance of the STL solution just because you prefer to work in ladder. The solution however is slightly complicated by the fact that ladder does not allow for exclusive or (XOR) operation at bit level. I simply used the (double) word XOR operation, mapped the edge into the double words and mapped the result to the output. Off course all the other bits can be used in a similar way. Attachment Toggle.jpg (3415 Downloads)

Suggestion To thank Quote Answer
This contribution was helpful to 3 thankful Users GaJEnDrA D S AlexG68 U_89052a17-2b5a-4...

8/31/2012 5:47 PM	Rate (0)
GaJEnDrA D S Bronze Member Joined: 8/9/2011 Last visit: 2/12/2021 Posts: 300 Rating: (18)	Hellow Bit7 I really dont know what is STL and its not supported by V11 by the way . I tried to do something with what i had . You can have many solutions for a particular problem in many cases and i had not gone through the discussion above either. In your case the program looks simpler for you but for the CPU lots of other things to be done just to execute one XOR block which adds to the scan cycle time. In addition you are sacrifising 2 double words just to control a bit which could be used somewhere else otherwise .. Thanks & Regards
	"Any intelligent fool can make things bigger, more complex. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.":):)
Suggestion To thank Quote Answer

7/7/2013 11:11 AM	Rate (0)
SMHZ Bronze Member Joined: 10/19/2012 Last visit: 12/23/2020 Posts: 314 Rating: (9)	you want the output to be latched or unlatched?

Suggestion To thank Quote Answer

10/4/2019 12:23 PM	Rate (0)
sda123 Regular Member Joined: 10/6/2017 Last visit: 12/16/2020 Posts: 5 Rating: (0)	Hi I also went through this question and get solution from here https://www.youtube.com/watch?v=KLGOr4Drils Use this circuit it will work without timer!
	Last edited by: The Helping Hand at: 10/04/2019 15:03:43 Embedded Video.
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on