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Scalling for different data fomats with S7-200

Created by: Helmut_13 at: 11/20/2007 10:18 AM (10 Replies)

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11/20/2007 10:18 AM	Rate (5)
Helmut_13 Posts: 2930 Rating: (432)	Hi all, one the must requested features is to scall values. Example: You have an analog sensor connected to a 0..10 V analoge input (dig. value 0 ... 32000) of the PLC. The Sensor has a range of -50 to 150°C and has a 0 ..10V output. Here is a library you can include into your MW so you can scall values as you like: The Lib includes 3 different scalling blocks: Scalling from: + Integer-2-Real + Real-2-Real + Real-2-Integer For the named example use the block Scale_I_to_R. Parameter: EN: Enalbes the scalling block Input: Address where you value comes from AIW0 for example Ish: Input high value (32000 in this example) Isl: Input low value (0 in this example) Osh: Output high value (150.0 in this example) Osl: Output low value (-50.0 in this example) Output: Taget address where you want to store the value All 3 block work the same only the Input and Output must fit to the data format: Integer (VW, MW, AQWx, ..) Real (VD, MD) For more details change to the scalling SBR and have a look to the comments in Network1. More information "how to import libraries to MW" you can find in the MW online help. I hope this helps. Attachment Scaling.zip (1938 Downloads)
Helmut_13 Posts: 2930 Rating: (432)
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This contribution was helpful to 2 thankful Users Burzredion zakix220

5/22/2008 5:39 PM	Rate (0)
mathias123 Posts: 2 Rating: (0)	hello, i tried your program, but i always have an error when i fil in VD0 at the output. i also use the I 2 Real, but i wont work what is my problem? best regards Popsel Mathias
mathias123 Posts: 2 Rating: (0)
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6/5/2008 8:09 AM	Rate (0)
Helmut_13 Posts: 2930 Rating: (432)	Hi, the only problem I ever had with this lib was the data format. post your scalling part with a short description what you want to scale and I will have a look to it. Regards Helmut
Helmut_13 Posts: 2930 Rating: (432)
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9/14/2008 1:19 AM	Rate (0)
camito Regular Member Joined: 6/9/2008 Last visit: 3/17/2021 Posts: 9 Rating: (0)	VERY USEFULL!!! THANKS!!!
	Carlos Torres GLISTON S.A. www.gliston.com.uy
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9/18/2008 2:55 PM	Rate (0)
GBROWN Posts: 5 Rating: (0)	The principle is simple .. As per the A/D converter your scale value should lie in the range 0 -- 32767. Primarily conversion from the allocated word memory (AIW) to a real format for your respective display to Double word (VD or MD) is the priority. This is needed to get a scaled output of 0 - 100. Direct conversion is not possible, therefore convert from I_DI and then DI_R. Dividing it by the respective value say, 327.67 for a scale of 0 - 100 . Enabling could be done by SM0.0 for a constant high state.
GBROWN Posts: 5 Rating: (0)
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9/18/2008 5:06 PM	Rate (0)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 11/12/2024 Posts: 4351 Rating: (1452)	Hi, I have also blocks to scalling analogical signals. They look like S7-300 blocks (FC 105, 106). Attachment divulgação S7-200 scale.zip (1427 Downloads)
	Denilson Pegaia Siemens Industry Sector Technical Support
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9/19/2008 8:17 AM	Rate (0)
GBROWN Posts: 5 Rating: (0)	Hi Pegaia, I agree completely.. FC's 105 for SCALE and 106 for UNSCALE are highly recommended. I suggested the previous solution just in case he used the above FC's for his own user defined FC and hence unlock the existing program.
GBROWN Posts: 5 Rating: (0)
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9/22/2008 1:38 AM	Rate (0)
marcsinclair Posts: 49 Rating: (5)	I use the IEC programming available in micro-win and this allows me convert and multiply using single commands. This makes scaling very easy
marcsinclair Posts: 49 Rating: (5)
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1/19/2009 3:37 PM	Rate (0)
Denilson Pegaia Platinum Member Joined: 9/23/2005 Last visit: 11/12/2024 Posts: 4351 Rating: (1452)	Hi, here stay the same project, but as print out version. Attachment Printout.zip (1268 Downloads)
	Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 1 thankful Users A_Taher

12/22/2014 6:38 AM	Rate (0)
Rocking_Rohit Posts: 6 Rating: (0)	Thank You Pal...
Rocking_Rohit Posts: 6 Rating: (0)
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