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Read Some Datas from DCS, Which FC Parameter i have to use?

7/2/2011 9:54 PM	Rate (0)
Engineering concept Experienced Member Joined: 2/2/2011 Last visit: 3/31/2023 Posts: 13 Rating: (0)	Thanks for the reply, I do have another question, FC parameter Register by register I Wanna Read Some Datas from DCS, Which FC Parameter i have to use? FC 03,06,16 or FC 04. Any Parameter do i have to assign in FB7 and FB8. if so how i have to do in Step 7 Please brief me above point. Splitted from CP 341(Slave) and Yokogawa CS300 (Master).
	Last edited by: O_Moderator at: 7/5/2011 10:57 AM new subject after splitting Regards, Engineering Concept
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7/3/2011 12:43 AM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 3/18/2025 Posts: 12344 Rating: (2707)	Engineering concept Thanks for the reply, I do have another question, FC parameter Register by register I Wanna Read Some Datas from DCS, Which FC Parameter i have to use? FC 03,06,16 or FC 04. Any Parameter do i have to assign in FB7 and FB8. if so how i have to do in Step 7 Please brief me above point. Hello Engineering concept; The title of your thread is: "CP 341(Slave) and Yokogawa CS300 (Master)" If this is the actual setup you plan to do, you have to understand thatcannot read/write from a slave to a master, and only the master can use the Modbus functions. A the read/writingis done by the master, and the slave only responds to the master's commands; it recieves data or sends data back to the master, as requested. Please read the Modbus slave manual to see how you can establish a working relationship between Modbus addresses in the CP 341slave and the Siemens S7 DB addresses available in the S7 CPU. Hope this helps, Daniel Chartier

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