Integration of PLC System

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Anonymous Poster #1	Integration of PLC System 10/30/2013 7:04 AM
	Dear All we are working for one of the project where we have to integrate 2 wire TT with our PLC System we have one analog input in our PLC System & TT shall be shall be communicating with the same there is one more process indicator which can accept input from RTD as well as 4-20 mA Transmitter supply shall be 24 VDC loop powered from output how can i integrate the above process indicator along with my TT & PLC System i dont have option to increase the analog input
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#1 Re: Integration of PLC System 10/30/2013 7:49 AM
	If you don't need both values continuously (i.e. if the variables are slowly changing) you could use a digital output to drive a relay to multiplex between the two inputs. __________________ "Love justice, you who rule the world" - Dante Alighieri
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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: 32049 Good Answers: 838	#2 Re: Integration of PLC System 10/30/2013 8:33 AM
	The indicator is merely linked in series with the temperature transmitter. The output and the RTD input are not needed. __________________ "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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Iris Guru Join Date: Jul 2010 Posts: 669 Good Answers: 176	#3 Re: Integration of PLC System 10/30/2013 8:42 AM
	The lack of punctuation, like a period to end a sentence, makes the original post incomprehensible.
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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: 32049 Good Answers: 838	#5 In reply to #3 Re: Integration of PLC System 11/01/2024 7:49 AM
	"Punctuation is the difference between knowing your sh!t and knowing you're sh!t"_{- Anonymous Poster #1.} Compare "Let's eat, Grandma" with "Let's eat Grandma". __________________ "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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suhasdh Associate Join Date: Sep 2009 Posts: 25	#4 Re: Integration of PLC System 03/05/2014 1:00 AM
	1. Either you can connect the analog signal in series with the PLC & the indicator. Or 2. Use a current multiplier. One analog i/p & two analog o/ps. Connect it to PLC & the indicator.
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Iris (1); JohnDG (1); PWSlack (2); suhasdh (1)

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