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Serial port data communication using MODBUS protocol

Ubiquity, Volume 2008 Issue January | BY Saptarshi Naskar , Krishnendu Basuli , Samar Sen Sarma 


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Serial communication is the process of sending data sequentially one bit at a time, over a communication channel or computer bus [5,6,7]. RS-232 is a standard for serial binary data transfer between a data terminal equipment (DTE) and a data circuit-terminating equipment (DCE), commonly used in computer serial ports.

Connection Failure


I use the modbus tester software from Eltima All data going through the serial port I see in my logs.

— Rocky, Thu, 27 Apr 2017 08:30:12 UTC

sir give asm coding please

— furqanjamil, Thu, 28 Apr 2011 10:47:15 UTC

dear sir i want to knoe can i use rs-232 to be converted in to MODBUS communication. we have an UPS (Uninterupted power supply) i want to take all its data to PLC pannel and then want to acces that that data on SCADA scree,although the UPS is EMERSON make and not support MODBUS communication. can you kindly provide me any suggesion/solution regarding this. Thnx & Regards

— Hemant Jakhwal, Tue, 22 Feb 2011 07:07:13 UTC

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