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PID

Created by: GVT at: 1/10/2013 8:20 AM (3 Replies)

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1/10/2013 8:20 AM	Rate (0)
GVT Posts: 15 Rating: (0)	Hello. Can you help me, how I can set PID compact in step7 V11? Or same simple program. I need to know, what is input and input_PER for example. I dont know, if input is in% or it is real value. Thank you
GVT Posts: 15 Rating: (0)
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1/10/2013 11:37 AM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 1/14/2025 Posts: 4392 Rating: (1463)	Hi Input_per unit (%, temperature, pressure, etc) is set in the PID Properties (Tool box button), directory Basic Setings; the scale is set on directory Process value settings. You get the many tips about PID at: /tf/WW/en/Posts/33957#top
	Last edited by: Pegaia at: 1/10/2013 11:38 AM Denilson Pegaia Siemens Industry Sector Technical Support
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1/10/2013 12:35 PM	Rate (0)
GVT Posts: 15 Rating: (0)	I have conversion real values to percent. I send my simple project. Is it good? Thank you Attachment PID.zip (255 Downloads)
GVT Posts: 15 Rating: (0)
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1/10/2013 4:24 PM	Rate (0)
Denilson Pegaia Platinum Expert Joined: 9/23/2005 Last visit: 1/14/2025 Posts: 4392 Rating: (1463)	Hi, I coudn't to confere precisaly the math that you use. I suggest, however to not use integer mathematical operations. Better, convert the input to float, convert the scale, and use it. In theTIP Sample program: SCALE and UNSCALE /tf/WW/en/Posts/31698#top you can find read to use blocks to analogic conversion
	Denilson Pegaia Siemens Industry Sector Technical Support
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