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SCALE and UNSCALE

Created by: Denilson Pegaia at: 6/24/2009 5:38 PM (57 Replies)

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5/13/2012 5:51 PM	Rate (0)
ISSAM Posts: 2 Rating: (0)	hi, i' am wondering how to test an output analogic for example PAW452 of PID 41.In the fact, i must convert the output by usuing FC106 or not?
ISSAM Posts: 2 Rating: (0)
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5/14/2012 1:31 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/11/2024 Posts: 4351 Rating: (1452)	Hi, Generaly, you need to use the FC106 if your block doesn't convert the scale directly to your analogic output. in the case of PID Compact, the output hasn't the feature to convert for 4..20mA as output scale. I suggest then to use OUT as float and FC106. This time of use, gives a little bit more of "transparece" about your program.
	Last edited by: Pegaia at: 5/14/2012 1:34 PM Denilson Pegaia Siemens Industry Sector Technical Support
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8/30/2012 10:23 AM	Rate (0)
cheichaa Posts: 20 Rating: (0)	i have an ultrasonic sensor that detects distances between 150mm(4ma) and 1000 mm (20 ma). in your last library for v11 i have to use scale 4..20 fc108 and set the low lim to be 150 and high limit to be 1000 .is that right ??? for ret value and the output how to configure them .in my project i have to get the output on the ethernet cable and to display the distance 150 to 1000 mm . i am wondering how to do that ? for the ret value is it boolean ??
cheichaa Posts: 20 Rating: (0)
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8/30/2012 12:44 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/11/2024 Posts: 4351 Rating: (1452)	Hi, The first consideration is correct, since you use a S7-1200: if you have an ultrasonic sensor that detects distances between 150mm(4ma) and 1000 mm (20 ma), I suggest you to use SCALE 4..20 and set the low lim to be 150 and high limit to be 1000. However I not understand completly what you means in your second sentence: "how to configure them .in my project i have to get the output on the ethernet cable and to display the distance 150 to 1000 mm . i am wondering how to do that ?" Can you explain it?
	Denilson Pegaia Siemens Industry Sector Technical Support
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8/30/2012 1:20 PM	Rate (0)
cheichaa Posts: 20 Rating: (0)	Thank you for your last reply.if i understand your code the out will be real but i do not understand the function of ret value ?? . [schnippschnapp]
cheichaa Posts: 20 Rating: (0)	Last edited by: O_Moderator at: 03.09.2012 08:44 new question is splitted to /tf/WW/de/Posts/79661#top
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10/6/2012 3:03 PM	Rate (0)
skoro27 Posts: 1 Rating: (0)	FC106've already used and works great! thanks
skoro27 Posts: 1 Rating: (0)
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10/9/2012 11:56 AM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/11/2024 Posts: 4351 Rating: (1452)	Hi cheichaa, Retval is used in this software to indicate that the input value is out of the range (value 8)
	Denilson Pegaia Siemens Industry Sector Technical Support
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10/19/2012 12:10 PM	Rate (1)
Bryll Posts: 168 Rating: (5)	I made a little useful thing that does what you mention above, I realize that I re-invented the wheel This is something I ported from another PLC system software that I use very often. You simply set the min and max levels of the incoming signal. Same with the upper and lower limits for your output. The output is in INT and REAL formats. If I have an input module of the range 0-20mA and the sensor is a 4-20mA, it's simple to insert a value at "MinLimit_In" to discard the values given below a 4mA input signal. The same is if you got a 0-10V input module and a sensor that gives a 0-6V signal, then you just type in the value representing 6V from the analog input module at "MaxLimit_In". Don't know if it will be useful for someone else, but I use it all the time Attachment CalcRange.zip (1109 Downloads)
Bryll Posts: 168 Rating: (5)
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This contribution was helpful to 1 thankful Users steveja2

3/3/2013 5:06 PM	Rate (2)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 11/11/2024 Posts: 4351 Rating: (1452)	Hi, The S7-1500 / STEP 7 V12 has already a SCALE/UNSCALE Blocks. S7-120, however doesn’t have yet. Attached there is a V12 version of the library. SCALE/UNSCALE and SCALE_4..20/UNSCALE_4..20 was made for S7-1200. New Blocks (that could be used also in S7-1500): SCALE_LREAL / UNSCALE_LREAL (for the case where is necessary an extra - accuracy in the scaling) RESCALE / RESCALE_LREAL (to scaling REAL to REAL or LREAL to LREAL) SCALE_TC_RTD (to convert analogical inputs for Termo coupler or standard RTD) SCALE_ RTD_climatic (to convert analogical inputs for climatic RTD) Attachment C:\Users\z0008iwv\Documents\Bluetooth Exchange Folder\LibraryV12SP1.zip (1143 Downloads)
	Last edited by: Pegaia at: 11/4/2014 10:52 AM Lib revised, now in version V12SP1; bipolar scale corrected from -27647 .. 27648 to from -27648 .. 27648 (thanks to BitPolierer for the tip). Denilson Pegaia Siemens Industry Sector Technical Support
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This contribution was helpful to 6 thankful Users Tranhieu0983 FelipeATMA BitPolierer zzVss chinajuan2 Mo.Sa

4/10/2013 9:39 PM	Rate (0)
leonlai909 Posts: 26 Rating: (0)	In FB108, IN is the Analog Input right ? HI_LIM / LO_LIM is my Setpoint for device ? OUT is the Output to any Word address ? how about Ret_Val ??? I dun know what to set it for ?? Thanks
leonlai909 Posts: 26 Rating: (0)
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