w07 profinet diagnostics workshop - marco freihoefer, indu-sol and peter thomas, control...
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Indu-Sol GmbH – Specialist in Fieldbus Technology
1 | PROFIBUS & PROFINET User Conference 2015 | presented: Indu-Sol GmbH | 16.07.2015
PROFINET
The future of communication
Marco Freihöfer
Indu-Sol GmbH – Specialist in Fieldbus Technology
2 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Common Points / Differences
1. Basics and quality parameters
1.1 Physical parameters
1.2 Logical parameters
2. Netload in PROFINET (Netload Class)
3. Metrological measurement and evaluation of quality parameters
PROFINET – The future of communication Abstract:
Indu-Sol GmbH – Specialist in Fieldbus Technology
3 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Common points with the classic fieldbus:
■ The physical basis, PROFIBUS / Interbus / CAN / SafetyBus p / AS-i
■ Balanced data transmission by means of differential voltage signal
■ Evaluation of communication quality over measuring/access points
Differences to classic fieldbus, e.g. PROFIBUS:
■ PROFIBUS has up to 32 devices in a segment, arranged linearly along a
passive line(max 125). PROFINET can be designed with up to 250 devices.
■ PROFIBUS logically functions according to the master/slave principle, using a
token passing procedure, only one telegram at a time – ‘male communication’
■ PROFINET uses the provider/consumer model, each device and the controller
send cyclic data without request at pre-set Update rate – ‘female communication’
■ PROFIBUS baudrate set once for all devices. In PN the updaterate for each
device can be set separately
■ Ethernet standard. Use of foreign protocols such as TCP/IP at the same line
(netload may spike).
Common points / differences
Indu-Sol GmbH – Specialist in Fieldbus Technology
4 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
■ Communication over 2 pair of wires (1-2 and 3-6)
■ Line-, star, ring topology
■ 2 devices are connected over 1 line
■ Integrated repeater function (switch function)
Controller Switch Switch Switch Switch
1 2 3 6
IP
Mac
Name
IP
Mac
Name
IP
Mac
Name
IP
Mac
Name
1. Basics and Quality Parameters
PROFINET – The future of communication
Indu-Sol GmbH – Specialist in Fieldbus Technology
5 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
1.1 Physical Parameters – CAT5 Certification
1. Basics and Quality Parameters
■ Line Length
■ Attenuation
■ Crosstalk
■ Specification after CAT5 Norm
■ 100 m max. Line length 24dB Attenuation
■ 1,5 m cable length also max 24dB Attenuation ???
PROFINET – The future of communication
Installed
cable length
Max. attenuation acc. to
standard Cat. 5e for 100
MHz
Length-dependent max.
attenuation, Indu-Sol
GmbH
Length-dependent
recommended
attenuation,
Indu-Sol GmbH
100 m 24 dB 24 dB 21 dB
50 m 24 dB 21 dB 18 dB
25 m 24 dB 18 dB 15 dB
12 m 24 dB 15 dB 12 dB
6 m 24 dB 12 dB 9 dB
3 m 24 dB 9 dB 6 dB
1.5 m 24 dB 6 dB 3 dB
Installed
cable length
Min. attenuation acc. to
standard Cat. 5e for 100
MHz
Length-dependent min.
attenuation Indu-Sol
GmbH
Length-dependent
min. attenuation Indu-
Sol GmbH
100 m 30 dB 30 dB 33 dB
50 m 30 dB 33 dB 36 dB
25 m 30 dB 36 dB 39 dB
12 m 30 dB 39 dB 42 dB
6 m 30 dB 42 dB 45 dB
3 m 30 dB 45 dB 48 dB
1.5 m 30 dB 48 dB 51 dB
Indu-Sol GmbH – Specialist in Fieldbus Technology
6 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
1.1 Physical Parameters - Linedepth
Every switch placed between a controller and a
Device leads to latency
During the design of a network, linedepth have to
be taken into account
1. Basics and Quality Parameters
PROFINET – The future of communication
I/O-Devices Terminal-Device I/O-Devices Terminal-Device
I/O-Devices
Terminal-Device
Indu-Sol GmbH – Specialist in Fieldbus Technology
7 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
1.1 Physical Parameters - Linedepth
Table for max linedepth at Store & Forward
Table for maximum linedepth at Cut Through
1. Basics and Quality Parameters
PROFINET – The future of communication
Max. linedepth at updaterate of
1 ms 2 ms 4 ms 8 ms
7 14 28 58
Max. linedepth at updaterate of
1 ms 2 ms 4 ms 8 ms
64 100 100 100
Indu-Sol GmbH – Specialist in Fieldbus Technology
8 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Caution: As it is unsure whether a device works in
Cut Through or Store & Forward modus, the design
of a network should be picked according to Store
& Forward (shorter line-depth) table.
PROFINET – The future of communication
1.1 Physical Parameters - Linedepth
Max. linedepth at updaterate of
1 ms 2 ms 4 ms 8 ms
7 14 28 58
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
9 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
The Jitter describes the time variance of PROFINET
packets (delay)
Raising Jitter could be evidence for a exceeded linedepth,
changed netload or device failure
PROFINET – The future of communication
1.2 Logical Parameters - Telegramjitter
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
10 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
4 ms
6 ms ∆ = 2ms = 50% Jitter
Examples of Error Patterns: Device falls of its own update rate To much TCP/IP traffic or disadvantageous topology Use of external, active diagnostic tools Recommendation Indu-Sol: 50%
PROFINET – The future of communication
1.2 Logical Parameters - Telegramjitter
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
11 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication
1.2 Logical Parameters - Telegramjitter
The real bus traffic “Jitter” (delay)
Update rate (arrival times)
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
12 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication
1.2 Logical Parameters - Telegramjitter
“Jitter” (delay)
Update rate (arrival times) Scheduled bus traffic
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
13 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication
1.2 Logical Parameters - Telegramjitter
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
14 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
1.2 Logical Parameters – Telegram Gap
Missing telegram
Communication failures may happen within a network.
Failures need to be recognized fast enough to bring the
system in a defied safe state
PROFINET – The future of communication 1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
15 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
Caution: PROFINET per default accepts only 3 missing
telegrams in a row
Recommendation Indu-Sol: 0
PROFINET – The future of communication
1.2 Logical Parameters – Telegram Gap
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
16 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
Telegram content defective
Communication failures may happen within a network.
Failures need to be recognized fast enough to bring the
system in a defied safe state
PROFINET – The future of communication
1.2 Logical Parameters – Error Telegram
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
17 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
1.2 Logical Parameters – Error Telegram
Caution: PROFINET per default accepts only 3 missing
telegrams in a row
Recommendation Indu-Sol: 0
PROFINET – The future of communication 1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
18 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
The netload of a network should be measured during full
operation
Communication lines with additional TCP/IP traffic
become more relevant
PROFINET – The future of communication
1.2 Logical Parameters – Loading Ratio
1. Basics and Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
19 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
1. Basics and Quality Parameters
Caution: to much TCP/IP traffic can lead into
communication failure
Recommendation Indu-Sol: 100:1
PROFINET – The future of communication
1.2 Logical Parameters – Loading Ratio
Indu-Sol GmbH – Specialist in Fieldbus Technology
20 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
Controller Switch
IP
PROFINET – The future of communication 1. Basics and Quality Parameters
1.2 Logical Parameters – Netload
Indu-Sol GmbH – Specialist in Fieldbus Technology
21 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
In order to leave enough reserve for network expansion and
or additional NRT traffic (TCP/IP) netload should not be
exceeded.
PROFINET – The future of communication
1.2 Logical Parameters – Netload
1. Basics and Quality Parameters
Netload Recommendation
<20%: no action necessary
20…50%: Check-up of planned netload is recommended
>50%: measures to decrease netload are demanded
Indu-Sol GmbH – Specialist in Fieldbus Technology
22 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Controller Switch
IP
Throughput per time unit (max. 100 MBit/s – Line
capacity)
Devices are specified after there throughput capacity
Recommendation Indu-Sol: 20%
PROFINET – The future of communication 1. Basics and Quality Parameters
1.2 Logical Parameters – Netload
Indu-Sol GmbH – Specialist in Fieldbus Technology
23 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Netload
Jitter
Telegram Gaps
Loding Ratio
Error Telegrams
< 50%
0
0
< 20%
100:1
Recommendations
1.2 Logical Parameters - Overview
PROFINET – The future of communication 1. Basics and Quality Parameters
Indu-Sol
Indu-Sol GmbH – Specialist in Fieldbus Technology
24 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
Normal Operation Limited Operation Faulty Operation
Cyclic and acyclic
communication
Only cyclic communication No communication
function
Netload-Class 1 < 1% < 5% > 5%
Netload-Class 2 - - -
Netload-Class 3 < 5% < 30% > 30%
■ Normal Operation
cyclic und acyclic data is being processed without restrictions
■ Limited Operation
cyclic data is being processed, acyclic data may be discarded
■ Faulty Operation
device can shut down
■ Once the netload returned to normal the device must power up again automatically
PROFINET – The future of communication 2. Netload in PROFINET (Netload Classes)
Indu-Sol GmbH – Specialist in Fieldbus Technology
25 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
2. Netload in PROFINET (Netload Classes)
Netload is to measure at nodes with concentrated
communication (Controller)
Multi controller networks need to be measured at each
controller separately
PROFINET – The future of communication
Indu-Sol GmbH – Specialist in Fieldbus Technology
26 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
IP IP IP IP
Controller
Switch Switch Switch Switch
■ Evaluation of Communication quality with PROFINET-INspektor®
■ Performance measure with a PASSIVE and direct network access point
3. Metrological measurement and evaluation of Quality Parameters
PROFINET – The future of communication
Indu-Sol GmbH – Specialist in Fieldbus Technology
27 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
■ Device matrix with status bar
Telegramjitter
Telegram Gap
Error Telegram
Loading Ratio
Netload
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
28 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
29 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
30 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
32 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
■ Gather information about Topology, Device setup or
Linedepth with PROscan® Active
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
33 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
■ Documentation and Device List
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
34 | PROFIBUS & PROFINET User Conference 2015| presented: Indu-Sol GmbH | 16.07.2015
■ Portstatistics
■ Errorcounter
■ Powerbudget
■ Connection Type
■ Discards
PROFINET – The future of communication 3. Metrological measurement and evaluation of Quality Parameters
Indu-Sol GmbH – Specialist in Fieldbus Technology
35 | PROFIBUS & PROFINET User Conference 2015 | presented: Indu-Sol GmbH | 16.07.2015
Do you have Questions?
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