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Connect CPU 226 to energy meter having RS 485 port

6/3/2009 2:20 PM	Rate (0)
May Posts: 24 Rating: (0)	Sir, I have CPU 226 xm,CN model and I want to connect energy meter having RS 485 port .I want to display the electrical values on HMI which I will connect to PLC.
May Posts: 24 Rating: (0)	Last edited by: CS Moderator at: 6/3/2009 3:57 PM new subject after splitting
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6/3/2009 3:00 PM	Rate (0)
Robster Platinum Member Joined: 5/28/2008 Last visit: 1/15/2026 Posts: 1344 Rating: (141)	Hi May, Do the energymeter supports Modbus Communication? If so, S7-200 should be Modbus Master ([url]http://support.automation.siemens.com/WW/view/en/27832511[/url]) and read data from energy meter, which is slave. Data from slave will be stored in variables which can be read by HMI. best regards

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6/3/2009 4:23 PM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Yeah, be careful. Lately I had Siemens PAC3200 energy meters with profibus. Don't forget that you con't be profibus master with S7-200.
	Best regards, Darius
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6/4/2009 8:14 AM	Rate (0)
Robster Platinum Member Joined: 5/28/2008 Last visit: 1/15/2026 Posts: 1344 Rating: (141)	Darius Yeah, be careful. Lately I had Siemens PAC3200 energy meters with profibus. Don't forget that you con't be profibus master with S7-200. But we're talking about Modbus, don't we?

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6/4/2009 9:37 AM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/9/2025 Posts: 2957 Rating: (243)	Hi, Robster Darius wrote: Yeah, be careful. Lately I had Siemens PAC3200 energy meters with profibus. Don't forget that you con't be profibus master with S7-200. But we're talking about Modbus, don't we? We are talking about energy meter with RS-485 port. It could be Profibus as well . But I hope it will be Modbus, it means no problems on S7-22x series.
	Best regards, Darius
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6/4/2009 9:44 AM	Rate (0)
Robster Platinum Member Joined: 5/28/2008 Last visit: 1/15/2026 Posts: 1344 Rating: (141)	^^That I wanted to hear

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6/11/2009 7:50 AM	Rate (0)
May Posts: 24 Rating: (0)	thanks! everybody
May Posts: 24 Rating: (0)
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