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avoid overshoot in controlled loop by FB41

Created by: SRV at: 2/23/2011 7:12 PM (2 Replies)

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2/23/2011 7:12 PM	Rate (0)
SRV Posts: 22 Rating: (0)	Hi I want to Increase speed of a process reaction by changing parameters of PID controller but I encountered overshoot in my controlled variable.What do you recommend to do to increase the speed and to be in a tolerable overshoot value.
SRV Posts: 22 Rating: (0)
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2/24/2011 8:18 AM	Rate (0)
Aret Posts: 2348 Rating: (265)	The higher GAIN you set the higher overshoot you gain. The higher TI you set the slower system reaction is (including decreased overshoot). So generally you must adjust these 2 parameters. There is standard procedure - you set "open" command and record runaway curve. Based on the form of this curve you can choose initial parameters.
Aret Posts: 2348 Rating: (265)
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This contribution was helpful to 2 thankful Users SRV Nikolai1

2/24/2011 10:25 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 12/5/2024 Posts: 6856 Rating: (1365)	SRV Hi I want to Increase speed of a process reaction by changing parameters of PID controller but I encountered overshoot in my controlled variable. Dear member Check section 2.1.19 (PARA_CTL: Parameter Control) of this manual. Application The block is used in controller structures with parameter changeovers when optimum parameters are required for different operating ranges. You can find the optimum values for PID, if you need a quick response, you can set a relatively high gain for initial conditions and then before a severe overshoot return all parameters to normal. BR
	Last edited by: hdhosseini at: 2/24/2011 10:26 AM Demo Channel on Youtube
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This contribution was helpful to 1 thankful Users SRV

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