Store PLCnext CommunityPLCnext on LinkedInPLCnext on Instagram  PLCnext on YouTube Github PLCnext CommunityStore PLCnext Community

Toggle Submenu
  1. Forums
  2. Recent
  3. Categories
Add a reply View Replies (1)

Resolved Modbus Server Error

0
Votes
Undo
  1. Rob H
    Rob H
  2. PLCnext Technology & PLCnext Controls
  3. Thursday, 09 January 2020

I am struggling with maintaining a stable connection with the Modbus TCP server using the Modbus_TCP_6 library. This is running on an AXC F 2152 FW 2019.9. I am testing it with 3 devices (each one separately, not at the same time): a Proface HMI, vision software using ASCOM, and vision software using Kepware. With all 3 devices, a successful connection is established, but it eventually throws an error 16#C205 - Only one use of an address is normally permitted. Any ideas what is causing this error?

  1. Modbus

Automation Engineer - Grand Rapids, MI, USA

Responses (1)
Rob H
Rob H Accepted Answer Pending Moderation
0
Votes
Undo

I need to do a better job reading the manual... With the regards to the tTimeout parameter for the MB_TCP_Server FB, the manual states:

"Timeout monitoring when there is a write access. After a write function
was executed, a write telegram must be received again within the time
specified here. A timeout error is reported if this is not the case. Specify
the timeout value T#0s to disable this function."

 

That fixed it. 

Automation Engineer - Grand Rapids, MI, USA

  1. more than a month ago
  2. PLCnext Technology & PLCnext Controls
  3. # 1
  • Page :
  • 1


There are no replies made for this post yet.
However, you are not allowed to reply to this post.