W4 PROFINET Frame Analysis, Peter Thomas · PDF fileAn Introduction to PROFINET Frame Analysis...

An Introduction to

PROFINET Frame

Analysis using

Peter ThomasControl Specialists Ltd

www.controlspecialists.co.uk

An Introduction to Profinet Frame Analysis using Wireshark – V1.0 (07/05/2013)

2Objectives

• To gain an understanding of the way in which PROFINET devices communicate with one another over Ethernet.

• To learn how to capture the PROFINET Frames using Wireshark®.

• To analyse the captured frames to gain an understanding and purpose of the various protocols.

• This is a topic covered in more detail in the Certified Profinet Engineers Course

An Introduction to Profinet Frame Analysis using Wireshark – V1.0 www.controlspecialists.co.uk

3What is Wireshark?

• Wireshark® is a network protocolanalyser. It lets you capture andinteractively browse the traffic running ona computer network.

• It is not dedicated to Proifinet and as suchcannot be compared to ProfiTrace.

• It is free to download and available fromwww.wireshark.org


4Frame Capturing – Mirrored Ports

Switch A – Port 2(IM153-3 & WAGO)

Switch B – Port 2(IM153-3 ONLY)

LAN LAN


5Frame Capturing – ProfiTap

USBX


6Frame Capturing Ports


7Scope of this workshop

• Wireshark® will be used to capture and analyseProfinet traffic during the following events:-

– Start-Up– Data Exchange– Loss of Module– Loss of Communications– Duplicate Device Name


8Equipment used in this workshop

• Siemens S7 PLC Hardware & Switches.• Wago IO• ProfiTap & Netilities from Procentec• Wireshark® Network Protocol Analyser.


9WIRESHARK - HomePage


10WIRESHARK – Frame Analysis


Packet Filter

Expression Filter Buttons

Packet Details Window

Packet Bytes Window

Packet List Window

11IEEE 802.3 EtherNet Frame

40 – 1500 BYTES

DATASOURCEMAC

6 BYTES

DESTMAC

ETHERTYPE

FRAMECHECK

SEQ

ETHER TYPE EXAMPLES

0800: Internet Protocol (IPV4)0806: ARP8892: PROFINET88CC: LLDP

Format / Contents dependent upon the value of the

ETHER TYPE

ETHERNET HEADER ETHERNET TRAILER

Note – VLAN Tags, IFG, Preamble and SFD bytes not shown.

ETHERNET FRAME

6 BYTES 2 BYTES 4 BYTES


12Profinet Frame

SOURCE ADDRESS DESTINATION ADDRESS ETHERTYPE

PROFINET IO DATA CYCLE COUNTER DATA STATUS

FRAME ID

TXFR STATUS

ETHERTYPE 8892 = PROFINET, FRAME ID 8000 = REAL TIME CLASS 2

-- APPLICATION PROTOCOL DATA UNIT STATUS --


13Profinet Frame (CPU to OUTPUTS)

SLOT 1

SLOT 2SLOT 3

SLOT 4

IOPS SLOT 3/4 DIG OUT DATA

DAP

DAP = DEVICE ACCESS POINT (IO DEVICE STATUS) 00 = BAD, 80 = GOODIOPS = IO PROVIDER STATUS (DATA STATUS @ CPU) 00 = BAD, 80 = GOOD


14Common Protocols

• PNIO-DCP – Name / IP Address Assignment• PNIO-CM – Start-up Services.• PNIO – Cyclic IO Data Exchange

• PN-PTCP – Time Syncronisation• PNIO-AL – Acyclic Alarms / Events

• ARP – IP Address – MAC Address Lookup• LLDP – Device Identity & Properties.


15Protocol Usage: Start-up to Data Exchange

Assign Device Name *

PNIO-DCP / ARP Assign IP Address

Establish Connection

PNIO-DCP or LLDP

PNIO-CM

PNIO Data Exchange

IO Device confirms Name SET

IO Device confirms IP Address SET

Connection Established

* DEVICE NAME ASSIGNMENT

Device Names can be set up Manually, prior to connecting to the network, or Automatically on power-up.

Manual name assignment uses PNIO-DCPand tools such as the Primary Set-Up Toolfrom Siemens or Netilities from Procentec.

Automatic name assignment uses theLLDP protocol and requires the use of a Profinet Topology Configuration Tool.

Primary Setup Tool


16

An Introduction to Profinet Frame Analysis using Wireshark – V1.0

Practical Workshop

• Step-by-Step Guide• Overview

www.controlspecialists.co.uk

W4 PROFINET Frame Analysis, Peter Thomas · PDF fileAn Introduction to PROFINET Frame Analysis...

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