Question: Give four possible reasons why the use of the time synchronization delay measurement FC 23 is not……

Give four possible reasons why the use of the time synchronization delay measurement FC 23 is not appropriate for DNP3 over TCP/IP. [4 Marks]

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DNP3 Operation Using TCP/IP ::

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The SCADAPack E RTU’s DNP3 convention operation over TCP/IP acclimates with the prerequisites of the DNP Client Group’s “Transporting DNP3 over Neighborhood and Wide Region Networks” archive. Relegated TCP and UDP harbour number “20000” is utilized for DNP3 communications

Both a UDP attachment audience and TCP attachment audience are introduced on the RTU for DNP3 communications. The attachments tuned in for are set by the “Default DNP3 Port” parameter (see underneath). Communication on both UDP and TCP attachments may be dynamic at the same time, and different outside TCP/IP gadgets may concurrently ask associations to the TCP attachment, or send datagrams to the UDP attachment.

PPP-TCP/IP preparing and communication over nearby zone and wide region systems may introduce additional delays in transporting DNP3 outlines. Expanding DNP3 Information Connect Layer and Application Layer time-outs in DNP3 gadgets, especially over PPP joins on Faded systems, may got to be considered.

This parameter may be set to either “UDP” or “TCP” and sets the default transport convention utilized for conveying out-bound DNP3 convention outlines over LAN/WAN joins. Where a DNP3 course table entry does not contain supersede data, the setting of this parameter decides whether UDP or TCP transport is utilized for out-bound DNP3 LAN/WAN communications. This parameter is designed from the Progressed TCP/IP Page of the SCADAPack E Configurator.

This parameter sets the UDP Port Number and TCP Port Number that’s utilized as the default for transporting DNP3 convention outlines over LAN/WAN joins. For in-bound get to to SCADAPack E RTU sockets for DNP3 communication, the setting of this parameter decides the harbour number utilized by the TCP and UDP attachment audience members for DNP3 LAN/WAN communications.

Where a DNP3 hub course table passage does not contain supersede data for out-bound communication, the setting of this parameter in conjunction with the “Default DNP3 Transport” parameter, decides the harbour number and transport utilized for out-bound DNP3 LAN/WAN communications. Regularly this parameter is set to “20000”, being the DNP Client Group’s assigned number for DNP3 communications for web systems

Where a SCADAPack E RTU is an end-node in a TCP/IP organize and DNP3 communication is used, the taking after parameters got to be set for rectify operation with a DNP Ace Station.

RTU DNP Address DNP3 node address of this RTU
DNP Master Address DNP3 node address of Master station
DNP Master Por IP interface harbour that has get to to Ace station organize
IP Address / Subnet local SCADAPack E settings for IP interfaces
DNP Node Route Table entry for Master Address including IP information in Connect No.field
DNP/IP Default DNP3 set the same as Ace station’s UDP or TCP port number unless the Connect No. field supersedes the UDP port number Port

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