Jump to content
Sign in to follow this  
cantcliff

How does CANbus protocol handle nodes dropping or entering the network?

Recommended Posts

Hi,

Can you provide more detailed question?

What CANBUS protocol do you mean?

What will be connected to Unitronics PLCs - Unitronics PLCs or 3rd party devices?

Then answer will be more detailed.

B.R.

Share this post


Link to post
Share on other sites

At this point all Unitronics PLCs.

We have several workstations in a cell, but they are not all powered up at the same time.  Some may be powered on, or shut down, during the shift. 

 

Would inter-PLC communication run into issues with a node entering or leaving the network?

Share this post


Link to post
Share on other sites

CANbus is very tolerant of nodes dropping off and entering the network.  Obviously disconnecting the wires would cause a problem, but other than that it doesn't care.  Your code should check the health of the destination PLC before you send anything to it.

 

I usually put a routine with a "Check Alive" function block in all PLCs on the CANbus network along with indicators on a screen to watch the individual node statuses (statii?).  

 

The best way to answer your question is to build it and then start powering nodes down at a time when you won't break something or kill someone if something goes awry.

 

Joe T.

Share this post


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.

Sign in to follow this  

×
×
  • Create New...