Communication of Protection Relays

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SHAJINAIR Participant Join Date: Aug 2015 Posts: 1	Communication of Protection Relays 08/05/2015 5:54 AM
	PLEASE HELP ME I NEED TO CONNECT MY 7SR242 SIEMENS RELAY MODBUS ITS NOT CONNECTING ,PLEASE HELP ME .
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Communication of Protection Relays 08/05/2015 9:02 AM
	READ THE FURNISHED MANUAL.
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SHOCKHISCAN Guru Join Date: Nov 2007 Location: Eastern Arizona mountains on Route 666 about a mile from God's country Posts: 1676 Good Answers: 122	#2 Re: Communication of Protection Relays 08/05/2015 9:31 AM
	Is the relay properly configured? (Baud rate? Parity? Start bit? Stop bit? etc.) Slave or master? If slave, has the master been properly configured to accept the device? System address correctly assigned to device? IS it in the correct protocol format? Is the circuit impedance being matched/met with the correct burden resistor in place on the relay (device) terminals? Is the signal wiring polarity correct? How many devices are allowed on the Modbus network you are trying to install the relay in/on? Is the relay series or parallel connected? What does the system require? All of the needed information for the relay is contained in the IOM and the information on Modbus communication is available for free on the internet. __________________ They said; "Brain size?" I heard; "Train size?" so I said: "I'll take a small one, thank you."
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#3 Re: Communication of Protection Relays 08/05/2015 1:55 PM
	Turn off Caps Lock Use the internet to discover the telephone number of the local Siemens office. Use a telephone to speak to a specialist there, giving details of the problem, a list of the things that have been tried, etc., etc. There is no No.4. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Wal Guru Join Date: Jun 2011 Location: Phnom Penh Posts: 4019 Good Answers: 102	#4 Re: Communication of Protection Relays 08/06/2015 2:16 AM
	Shaj, Sorry mate but you are just gonna have to do the research and self learning that you have just asked the CR4 members to do by yourself. You have the advantage of having the equipment under your nose. __________________ Difficulty is not an obstacle it is merely an attribute.
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lyn (1); PWSlack (1); SHOCKHISCAN (1); Wal (1)

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