Communication problem with DNP3 device

Communication problem with DNP3 device

Hi,
I have some problems in communication with a RS485 serial dnp3 device. Some times disconnection happens in communication between zenon and device for few seconds. These interruptions are not periodic and usually their duration times are close together.
In this situation, due to Rx/Tx LED of serial device server are off and its software indicates no transmission data, there is no Send/Receive message between both sides. In addition all variation data and executed commands will be send after expiring timeout in both direction.

I could not find out its reason:confused:, the device not response or zenon not request in this duration?
Also I provide two log files, device profile documentation as attachments and device current communication setting as below:
Linklayer Confirmation Timeout: 0ms
Linklayer retry Count: 1
Appl.layer Confirmation Timeout: 5000ms
Appl.layer Confirmation mode: event only
Unsolicited resp. mode: disable

1- Could you please help me in this case?
2- What does mean the below message in “Trace message” column of DiagViewer?
**** zenOnDNP3Master5 Duplicate request removed from message queue ****~
Thanks in advance

This is a migrated post! Originally posted on 16.01.2011 by user roberto1978. Please be aware that information can be outdated.

    Disclaimer

    This document governs the use of our Community Forum. By registering and using the platform, you accept these conditions.

    The COPA-DATA Community Forum serves to encourage the exchange of information and experience about the zenon software between forum users respectively zenon users.

    Please mind that any published information on the Community Forum is the subjective opinion and view based on the experience and the level of knowledge of the author. COPA-DATA does not overtake any responsibility for the content and the accuracy of the shared information.

    Users of the Community Forum are encouraged to share only well-founded experiences and to point out any risks associated with the implementation of proposed solutions to problems. COPA-DATA at its absolute discretion, reserves the right to moderate the forum. In this connection COPA-DATA may remove any information containing false facts, potentially dangerous solutions, bad language or content that may insult, degrade or discriminate others. COPA-DATA may block a non-complying user from forum access if the user violated this provision.

    COPA-DATA reserves the right to change this document from time to time at own discretion.


    Ing. Punzenberger COPA-DATA GmbH
    Karolingerstraße 7b · 5020 Salzburg · Austria
    www.copadata.com