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how can I store data from various sensors in PLC memory to display graphics for various periods of time

Created by: Flomaster at: 1/22/2010 6:57 AM (10 Replies)

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1/22/2010 6:57 AM	Rate (0)
Flomaster Posts: 65 Rating: (2)	Hi all! I have some questions about PLC S7-1200 and HMI KPT1500. [schnippschnapp] PLC program gets data from various sensors and I can display this data on HMI screens in real-time. But how can I store this data in PLC memory to display graphics for various periods of time? [schnippschnapp]
Flomaster Posts: 65 Rating: (2)	Last edited by: O_Moderator at: 1/27/2010 10:24 AM other questions are in the following threads /tf/WW/en/Posts/39276#top /tf/WW/en/Posts/39467#top
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1/22/2010 7:19 AM	Rate (0)
Darius Platinum Member Joined: 9/28/2005 Last visit: 12/3/2024 Posts: 2957 Rating: (243)	Hello, [schnippschnapp] Flomaster 2. PLC program gets data from various sensors and I can display this data on HMI screens in real-time. But how can I store this data in PLC memory to display graphics for various periods of time? These HMI does not have any memory card slots. You can use for user data only 512K of inbuilt memory. Anyway you can not use this memory for data logging or for archiving and then displaying history data as trends. [schnippschnapp]
	Last edited by: O_Moderator at: 1/27/2010 10:27 AM Last edited by: Darius at: 1/22/2010 7:21 AM Best regards, Darius
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1/25/2010 10:13 AM	Rate (0)
Robster Gold Expert Joined: 5/28/2008 Last visit: 10/23/2024 Posts: 1343 Rating: (141)	Hi, [schnippschnapp] Take the S7-1200 to save your values. Move the value from senor into a variable. If you declare this variable as retentive, you also have the value insider after power off. [schnippschnapp] regards
	Last edited by: O_Moderator at: 1/27/2010 10:32 AM
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1/25/2010 11:19 AM	Rate (0)
Flomaster Posts: 65 Rating: (2)	[schnippschnapp] Robster The problem with memory: Take the S7-1200 to save your values. Move the value from senor into a variable. If you declare this variable as retentive, you also have the value insider after power off. But I want to store values from sensor for a long period, for example 2 or 3 months. And an interval between sensor's measures must be 0.5 seconds. I suppose, I can use an array in PLC memory. But how can I draw graphic of array's values on HMI?
Flomaster Posts: 65 Rating: (2)	Last edited by: O_Moderator at: 1/27/2010 10:34 AM
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1/25/2010 1:05 PM	Rate (0)
Robster Gold Expert Joined: 5/28/2008 Last visit: 10/23/2024 Posts: 1343 Rating: (141)	A value in array is nothing more then a "normal" value. You can also connect a array-variable to a graphic in HMI. But this don't solve the problem with saving the value for a long peroid. Here is a FAQ, which is nearly to your problem. But I don't like this method: How can you back up parameters before loading a new control program? Another way could be, to connect your S7-1200 with a OPC-Server. As OPC Client you can take MS Excel, there you can save your value in a table. After turning on your S7-1200 again after 3 month, you can write the last values from Excel to PLC. Hope it helps a little bit more.. regards

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1/25/2010 1:22 PM	Rate (0)
Flomaster Posts: 65 Rating: (2)	Robster A value in array is nothing more then a "normal" value. You can also connect a array-variable to a graphic in HMI. But this don't solve the problem with saving the value for a long peroid. Here is a FAQ, which is nearly to your problem. But I don't like this method: How can you back up parameters before loading a new control program? Another way could be, to connect your S7-1200 with a OPC-Server. As OPC Client you can take MS Excel, there you can save your value in a table. After turning on your S7-1200 again after 3 month, you can write the last values from Excel to PLC. Hope it helps a little bit more.. regards Thank you very much, Robster! I'll try it all.
Flomaster Posts: 65 Rating: (2)
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1/27/2010 1:02 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 12/10/2024 Posts: 4362 Rating: (1456)	Hi, you can use FieldWrite to "stack" values. However, normally it is only absolutely necessary if the acquisition time is too short for other methods. The representation of this value in the HMI could be not so “friendly” by this method. If you read the variable at seconds intervals, think in to use a HMI that could work Historical Data. The time representation is done automatically. You can also store data as .csv in a network drive, if you want.
	Last edited by: Pegaia at: 1/27/2010 1:06 PM Denilson Pegaia Siemens Industry Sector Technical Support
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1/27/2010 3:11 PM	Rate (0)
Flomaster Posts: 65 Rating: (2)	Pegaia Hi, you can use FieldWrite to "stack" values. However, normally it is only absolutely necessary if the acquisition time is too short for other methods. The representation of this value in the HMI could be not so “friendly” by this method. If you read the variable at seconds intervals, think in to use a HMI that could work Historical Data. The time representation is done automatically. You can also store data as .csv in a network drive, if you want. Thank you for your respond! What types of Simatic HMI's can work with Historical Data? And are they compatable with PLC S7-1200?
Flomaster Posts: 65 Rating: (2)
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1/27/2010 4:00 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 12/10/2024 Posts: 4362 Rating: (1456)	Hi, the TP277, MP277, MP377 and Runtime can work with Historical Data. If they are homologated for S7-1200, that is other history... The FAQ http://support.automation.siemens.com/BR/view/en/38111886shows how to configure a Runtime with S7-1200. The same principle shouldwork with others HMI.
	Denilson Pegaia Siemens Industry Sector Technical Support
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12/4/2015 1:00 PM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 12/10/2024 Posts: 4114 Rating: (195)	New question published by Ted_ng is split to a separate thread with the subject read value from sensor - How to save value with is not depend on time?. Best regards CS Moderator
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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