Fieldbus Testing with Online Physical Layer Diagnostics - Technical White Paper | Pepperl+Fuchs

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Fieldbus Testing with Online Physical Layer Diagnostics – Technical White Paper
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Content
2.2 Advanced physical layer diagnostics (APLD) ................................................................................................................................. 4
2.2.1 The optimized test procedure ................................................................................................................................................ 4
2.2.2 Hardware setup of stationary, integrated APLD..................................................................................................................... 6
2.2.3 Handheld APLD..................................................................................................................................................................... 7
3 Fault Finding & Troubleshooting ..................................................................................................................................................... 8
3.1 Elimination Method......................................................................................................................................................................... 8
3.2 Expert modes of APLD................................................................................................................................................................... 9
3.2.1 The inline fieldbus oscilloscope ............................................................................................................................................. 9
3.2.2 Failure margin checking for commissioning of installed components .................................................................................... 9
3.3 More use cases for APLD tools ...................................................................................................................................................... 9
3.3.1 During operation .................................................................................................................................................................... 9
3.3.2 Cable check for plant upgrades and brown field sites...........................................................................................................10
3.3.3 Device coupler short circuit test ............................................................................................................................................10
4 Case study ........................................................................................................................................................................................10
5 Summary ...........................................................................................................................................................................................12
6 References / Bibliography ...............................................................................................................................................................12
7 FieldConnex® Components for Advanced Physical Layer Diagnostics ......................................................................................13
lists abbreviations in this document.
Table 1: Abbreviations
Abbreviation Definition
ADM Advanced diagnostic module
APLD Advanced physical layer diagnostics
ATE Automated test engine
CAPEX Capital expenditure
FDH-1 Fieldbus diagnostic handheld
RC Resistance capacitance