Jump to content

Modbus Mst start of vector error?


Ausman

Recommended Posts

  • MVP 2023

Hi all,

 

today I have had to work for the first time with a modbus device that uses numbers over 32767.  I merrily coded away using the available options in the dropdowns, specifically ML and DW in the Slave start of vector and the Master start of vector.  No matter what I did I couldn't get it to work when I had ML and DW in use on the Master start of vector.  Works fine on the Slave start, but on the Master start only MI would work, and it then went inverted once 32767 was exceeded.  I eventually went to the help file and discovered that only MIs are listed for the Master SOV.  Not ML & DW.

 

If they aren't available, they shouldn't be listed in the dropdown.  See the pics.

 

Lost quite a few hours on this as had to do it on a slow remote connection on a canbus slave, which all takes more time and makes one grumpy!  I can do maths to get around the issue, but based on my results I politely request that it is a fault that should be cured.

 

Cheers,

 

Aus

 

post-12856-0-93093100-1461291416_thumb.jpgpost-12856-0-62914500-1461291418_thumb.jpg

Link to comment
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...