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Storage data in PLC S7-1200

Created by: bathoi at: 12/18/2011 2:01 PM (21 Replies)

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12/20/2011 5:29 AM	Rate (2)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/17/2024 Posts: 1521 Rating: (227)	Hello bathio, What does your application demands? How many bytes you need to retain? Check this if it helps you. In STEP 7 V11 how do you configure data blocks with the "Only store in load memory" attribute for the S7-1200?
	Last edited by: Ganes10 at: 12/20/2011 5:37 AM Like it? Rate it!
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12/20/2011 10:20 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	I need about 20.000 byte. do you have Step 7 v11 software? It free? thank?
bathoi Posts: 28 Rating: (0)
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12/20/2011 12:24 PM	Rate (0)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (152)	Put a UPS to power a plc.

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12/21/2011 1:57 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	I making a machine. it using check many kind of relay. Example JWXC1-1700, JWXC1-1000.. and i want to save some information about relay into PLC,I want to print information about 100 relay in Computer, which is storgae in PLC.
bathoi Posts: 28 Rating: (0)
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12/21/2011 4:29 AM	Rate (0)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/17/2024 Posts: 1521 Rating: (227)	You need to archive data and view it later for some analysis, is it your exact requirement?
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12/22/2011 11:32 AM	Rate (0)
bathoi Posts: 28 Rating: (0)	Than for your help. Put a UPS to power a plc. maybe a good ideal
bathoi Posts: 28 Rating: (0)
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2/3/2012 4:27 PM	Rate (0)
JairVargas Experienced Member Joined: 9/15/2010 Last visit: 5/3/2024 Posts: 80 Rating: (13)	Yeah an UPS is cheaper than a 1200 Memory Card.
	---------------------------- Jair Vargas T. Santa Cruz - Bolivia jair.dvt[at]gmail[dot]com whatsapp: +591 71336622 http://www.plc.com.bo
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6/27/2012 11:59 AM	Rate (1)
Dickydik Experienced Member Joined: 12/12/2008 Last visit: 6/26/2024 Posts: 17 Rating: (2)	I had the same problem: insufficient retentive memory. Solved the problem: I created a Data_Block with a struct inside containing my data. When the data changes I use the instruction Writ_DBL to save the datablock to the load memory, you can use either the internal Load memory (flashcard not needed) or flashcard. When power returns after faillure I read out the First_Scan_Bit wich trigger the Read_DBL instruction to load back from the load memory. hope this will solve your problem
	Productspecialist Industrial Automation Onexis/Rexel / Hagemeyer Netherlands Specialism: Simatic
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6/27/2012 1:18 PM	Rate (1)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 9/17/2024 Posts: 1521 Rating: (227)	Hello Guys, Now S7-1200 has a new CPU - CPU 1215C which has a retentive memory of 10 KB, which can solve most of the user's problem. If we still need in the other CPUs also, then we need to wait for a while.
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6/27/2012 4:02 PM	Rate (1)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 9/16/2024 Posts: 15188 Rating: (2417)	Ganes10 Hello Guys, Now S7-1200 has a new CPU - CPU 1215C which has a retentive memory of 10 KB, which can solve most of the user's problem. If we still need in the other CPUs also, then we need to wait for a while. Yes, the new S7-1200 FW3.0 versions have more memory, and more retentive memory, plus a battery backup option (as a signal board) that should hold data for up to a year if I read the documentation correctly. The S7-1215 on my desk looks ready to go solve some problems from 2 years ago.
	science guy
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This contribution was helpful to 1 thankful Users Vivek Kansara

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