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Convert OB251 To FB 41 in S7

Created by: Wijekoon at: 10/25/2012 10:31 PM (11 Replies)

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10/25/2012 10:31 PM	Rate (0)
Wijekoon Posts: 59 Rating: (2)	Dear All, I haven’t previous experience with PID conversion. So please explain me how to convert OB251 in this attache program to S7 FB41 and how can enter the memory location and limit values also. Best Regards Wijekoon Attachment S7 program after converting.pdf (972 Downloads)
Wijekoon Posts: 59 Rating: (2)
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10/25/2012 10:43 PM	Rate (0)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 11/4/2024 Posts: 12293 Rating: (2690)	Hello wijekoon; Your printout does not identif the parameters used in your PID block, so it is difficult to see what values were inserted for the different PID gains, for example. See if the following FAQ can help you start, and post a screencapture of your original OB251 so we can hel you further. Converting Control Parameters from S5 to S7 Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 10/25/2012 10:43 PM
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This contribution was helpful to 1 thankful Users hdhosseini

10/26/2012 7:01 PM	Rate (0)
Wijekoon Posts: 59 Rating: (2)	Dear Dchartier Thanks for your support and please see this attached program image for your reference and please help me this PID Conversion. Best Regards Wijekoon Attachment Past PID.zip (862 Downloads)
Wijekoon Posts: 59 Rating: (2)	Last edited by: Wijekoon at: 10/26/2012 7:05 PM
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10/30/2012 7:00 PM	Rate (0)
Wijekoon Posts: 59 Rating: (2)	Dear Member / Expert My S5 program PID (OB251) Parameters as below, DB 103 DW 1 (K – Proportional Factor) DW3 (R – Parameter) DW5 (TI – TA/TN) DW7 (TD – TV/TA) DW9 (W- Set point) DW 12 (YH – Hand Set value) DW14 (BGOG – Upper Limit) DW 16 (BGUG – Lower Limit) DW 22 (X – Feed back) DW24 (Z – Disturbance variable ) DW 29 (XZ – S.V.C.D) DW48 (Output value) I’m not familiar with S5 or S7 PID Blocks so please explain me · How can enter those values in S7 PID Block (FB41) · How can find the TA, TN & TV · What are the important parameters in S7 Block (FB41)? Best Regards Wijekoon
Wijekoon Posts: 59 Rating: (2)
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10/30/2012 8:51 PM	Rate (0)
hdhosseini Diamond Member Joined: 1/28/2009 Last visit: 10/26/2024 Posts: 6852 Rating: (1365)	Wijekoon Dear Member / Expert My S5 program PID (OB251) Parameters as below, DB 103 DW 1 (K – Proportional Factor) DW3 (R – Parameter) DW5 (TI – TA/TN) DW7 (TD – TV/TA) DW9 (W- Set point) DW 12 (YH – Hand Set value) DW14 (BGOG – Upper Limit) DW 16 (BGUG – Lower Limit) DW 22 (X – Feed back) DW24 (Z – Disturbance variable ) DW 29 (XZ – S.V.C.D) DW48 (Output value) I’m not familiar with S5 or S7 PID Blocks so please explain me · How can enter those values in S7 PID Block (FB41) · How can find the TA, TN & TV · What are the important parameters in S7 Block (FB41)? Best Regards Wijekoon Hello, Please check section 9.3.3 of the THIS manual for S5 PID controller.For PID controller in S7 controllers(FB41), you can check this manual(1.pdf ).Checking description of both blcoks and digram provided, you can map each parameters from S5 to S7 controllers.Check the following clustered threads for FB41 here: PID Control Package - FB41 Samples Best regards, Hamid Hosseini
	Demo Channel on Youtube
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10/31/2012 8:38 PM	Rate (0)
Wijekoon Posts: 59 Rating: (2)	Dear Friend Thank you for your infomation and support. Please check below program and tell am I currect. CALL "CONT_C" , DB165 COM_RST :=TRUE MAN_ON := PVPER_ON:= P_SEL := I_SEL := INT_HOLD:= I_ITL_ON:= D_SEL := CYCLE :=T#100MS SP_INT :=MD636 ( DW 9 in S5) PV_IN := PV_PER :=DB65.DBW44 ( DW22 in S5) MAN := GAIN := MD 640 (WD 1 x DW 3 in S5) TI := (TA /TI in S5) TD := (TD x TA in S5) TM_LAG := DEADB_W := LMN_HLM :=1.000000e+003 (DW 14 in S5) LMN_LLM :=2.000000e+002 (DW 16 in S5) PV_FAC := PV_OFF := LMN_FAC := LMN_OFF := I_ITLVAL:= DISV := LMN := LMN_PER :=DB65.DBW96 ( DW48 in S5) QLMN_HLM:= QLMN_LLM:= LMN_P := LMN_I := LMN_D := PV := ER := NOP 0 Best Regards Wijekoon
Wijekoon Posts: 59 Rating: (2)	Last edited by: Wijekoon at: 10/31/2012 9:42 PM Last edited by: Wijekoon at: 10/31/2012 9:35 PM
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11/1/2012 7:42 PM	Rate (0)
hdhosseini Diamond Member Joined: 1/28/2009 Last visit: 10/26/2024 Posts: 6852 Rating: (1365)	Wijekoon Dear Friend Thank you for your infomation and support. Please check below program and tell am I currect. CALL "CONT_C" , DB165 COM_RST :=TRUE MAN_ON := PVPER_ON:= P_SEL := I_SEL := INT_HOLD:= I_ITL_ON:= D_SEL := CYCLE :=T#100MS SP_INT :=MD636 ( DW 9 in S5) PV_IN := PV_PER :=DB65.DBW44 ( DW22 in S5) MAN := GAIN := MD 640 (WD 1 x DW 3 in S5) TI := (TA /TI in S5) TD := (TD x TA in S5) TM_LAG := DEADB_W := LMN_HLM :=1.000000e+003 (DW 14 in S5) LMN_LLM :=2.000000e+002 (DW 16 in S5) PV_FAC := PV_OFF := LMN_FAC := LMN_OFF := I_ITLVAL:= DISV := LMN := LMN_PER :=DB65.DBW96 ( DW48 in S5) QLMN_HLM:= QLMN_LLM:= LMN_P := LMN_I := LMN_D := PV := ER := NOP 0 Hello , I will check the other parameters, but first please note COM_RST has the highest priority compared to manual and automatic mode.When you enable that signal,all internal parameters and ouputs of algorithm(FB41) will be set to zero. Enabling "PVPER_ON" seems to be compulsory while entering process value from"PV_PER".Please note that selection of "PV_FAC" ,"PV_OFF" to convert percentage to your selected process value. Values for LMN_HLM and LMN_LLM are usually around 0 to 100. Best regards Hamid Hosseini
	Demo Channel on Youtube
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11/6/2012 5:42 PM	Rate (0)
Wijekoon Posts: 59 Rating: (2)	Dear Hadhosseini Thanks for your support and instruction. I success fully completed my conversion project. So I would like to thanks to all who are the support persons for this conversion Best Regards Wijekoon
Wijekoon Posts: 59 Rating: (2)
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This contribution was helpful to 2 thankful Users S_Moderator hdhosseini

10/15/2013 10:23 AM	Rate (0)
O_Moderator Diamond Member Joined: 4/24/2009 Last visit: 8/20/2024 Posts: 2682 Rating: (135)	New question splitted to Where can I find TA in S5? Best regards O_Moderator
	Tips&Tricks for the forum usage
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2/17/2014 8:56 AM	Rate (0)
nguyenlong89hui Posts: 28 Rating: (0)	dear all, DW 1 (K – Proportional Factor) =1024 (factor=0.001) DW3 (R – Parameter)=18592 (factor=0.001 when i convert to s7 then gain= 18,592 Please check my program and tell me I correct or incorrect thanks
nguyenlong89hui Posts: 28 Rating: (0)
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