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Anonymous Poster

Cable Length

08/04/2009 8:30 AM

hello

i want to measure cable length in two nodes in profinet n/w how i can measure it by online communication with plc sysytem or thier any other way to measure it.

i can not measure it physically due to un accesability
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rakesh_semwal
Guru
India - Member - New Member Engineering Fields - Electromechanical Engineering - New Member

Join Date: Oct 2006
Location: India, 200 Km. North of Delhi.
Posts: 1393
Good Answers: 53
#1

Re: How to measure cable Length in profinet vis software in two nodes

08/04/2009 9:03 AM

For a given diameter of conductor Resistance is proportional to length. So a ohmmeter connected with PC with small software can work.
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Anonymous Poster
#2

Re: Cable Length

08/07/2009 7:27 AM

You stand at the initiator and have a buddy stand at the receiver.

You initiate an action and record the time. You buddy notices that action and records the time. The difference is the time difference/ speed of light.
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noshorts
Power-User

Join Date: Jun 2008
Location: Olive Branch, Ms. USA
Posts: 124
#3

Re: Cable Length

08/22/2009 1:10 PM

You can use a TDR(Time Domain Reflectometer)

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