Jump to content

Very Basic Ladder Logic Question


Recommended Posts

Hi,

I was a very basic ladder logic question. At the moment I can only force on outputs on from the  PLC . My latches do not seem to be working correctly. When I activate the start pushbutton when in online mode the  green light output is not activated. I know the output works when forced the output to a 1 the green light turns on. 

Sorry total new to PLC programming and just trying to get to a handle of it.

Any help at all would be great.

Thanks, 

 

image.png.1322a33cab85b3aa5b743b91a0e08b4e.png

 

image.png

Link to post
Share on other sites

Do you have power flow all the way to the "Automode" coil when in online mode (i.e. are "Auto_Selector_5", "Stop_2_PB", "Emergency Stop" all closed and "F1_Overload" open)? Is "Start_1_PB closing?

Is this in a subroutine? If so, is it being called in the Main Routine?

Link to post
Share on other sites
1 hour ago, Flex727 said:

Do you have power flow all the way to the "Automode" coil when in online mode (i.e. are "Auto_Selector_5", "Stop_2_PB", "Emergency Stop" all closed and "F1_Overload" open)? Is "Start_1_PB closing?

Is this in a subroutine? If so, is it being called in the Main Routine?

Hi, thanks for your help,

I have power all the way to the coil but it's not activating.  Should automode that is in parallel with start_pb be an internal bit or a output. I have it as a an global tag. It is the main routine.

Again thanks for the help,

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...