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Bipolar PID with FB41

Created by: intertarik at: 6/11/2015 4:56 PM (2 Replies)

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6/11/2015 4:56 PM	Rate (0)
intertarik Posts: 24 Rating: (2)	hello, I'm new in automatics, and i'm working on a speed control project for a hydraulic turbine. i'm using FB41 pid bloc, but the LMN give me 0 to 100 input. the SP is 1000 RPM and the PV is calculated from an inductif sensor. how can i get bipolar LMN -100% ... +100% if the speed >1000 rpm, then LMN give négative value to reduce the speed. and if speed < 1000 rpm, the LMN give ^positive value to increase the speed. thx a lot
intertarik Posts: 24 Rating: (2)
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6/11/2015 5:22 PM	Rate (1)
MicroMan Platinum Member Joined: 11/29/2011 Last visit: 2/20/2023 Posts: 1347 Rating: (226)	Hi, The Low limit of the LMN is setable by "LMN_LLM Lower limit of the man. variable –100.0 ... LMN_HLM [%]" See the theStandard PID Control Manual page 5-12.
	- What you read here, please check with manuals and your requirements. - Do not forget to Test, Test and Test... - If the post is helpful, please RATE it! MicroMan
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6/11/2015 9:45 PM	Rate (0)
intertarik Posts: 24 Rating: (2)	MicroMan Hi, The Low limit of the LMN is setable by "LMN_LLM Lower limit of the man. variable –100.0 ... LMN_HLM [%]" See the theStandard PID Control Manual page 5-12. thanks you MICROMAN it's exactly what i want,
intertarik Posts: 24 Rating: (2)
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