Jump to content

Recommended Posts

Hello all,

When looking at the string generated by the Modbus FB is this:

[] = byte

[address] [Function] [Registor High] [Register-Low] [Length-High] [Length-Low] [CRC-High] [CRC-Low]

According to PI-MBUS-300.pdf, the CRC should be LB, HB. (See Attached Screenshot)

My post is two fold:

1. Does anyone have an example where the worked around this? The slave device is looking for CRC LB,HB.

2. A suggestion is to add a pull down in the Modbus configuration to change the CRC-16 order.


post-52-074751900 1300734068_thumb.png

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.

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...