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Help with moving DB

Created by: Martins_Eng at: 9/8/2011 4:42 PM (4 Replies)

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9/8/2011 4:42 PM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 11/12/2025 Posts: 189 Rating: (0)	Hi guys. I have a problem with the step where I have 700-300 to generate a kind of recipe set-point. I will create a DB to get the DB in the supervisory and operator will insert the values formed float (real) for example 3.22, there have to carry this value in the set-point of the FB41. I thought to generate a DB to be loaded by the operator and the same after the operation confirm this DB will load the values for the DB in FB41. thus: DB4 DB.4DBD2 = 22.3 (Valo operator) confirms Loads the value at 22.3 DB1.DBD10 SP_IN the what and the FB41. I tried using the function movblock but gave no result. What should I do?

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9/9/2011 7:04 AM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	Martins_Eng Hi guys. I have a problem with the step where I have S7-300 to generate a kind of recipe set-point. I will create a DB to get the DB in the supervisory and operator will insert the values formed float (real) for example 3.22, there have to carry this value in the set-point of the FB41. I thought to generate a DB to be loaded by the operator and the same after the operation confirm this DB will load the values for the DB in FB41. thus: DB4 DB.4DBD2 = 22.3 (Valo operator) confirms Loads the value at 22.3 DB1.DBD10 SP_IN the what and the FB41. I tried using the function movblock but gave no result. What should I do? Dear Martins_Eng If you want to only transfer a value from HMI to set point section of FB41,it is easily possible by assigning the absolute address assigned for the setpoint in I/O field with Write access in HMI.You can also define user authentication to change the value. you have also options to generate setpoint by these 2 functions, (From modular PID control)check if they are useful: Modular PID manual 2.1.22 RMP_SOAK: Ramp Soak Application The ramp soak is used mainly as a setpoint value generator for a controller that sets different setpoints at different times while the process is running. 2.1.25 SP_GEN: Setpoint Value Generator Application To enter a setpoint value manually, the output value can be modified with the SP_GEN block using two inputs. To allow small changes, the block should have a sampling time of <=100 ms. Best regards
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9/10/2011 1:02 AM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 11/12/2025 Posts: 189 Rating: (0)	Dear hdhosseini. That way I could do, I create recipes like 8 DBs where the User will enter the set points, and each will run separately or DB when a DB is being used other Irai get off, there have to load the DB on the set FB 41 points of what I have. It has a way to create a pointer to pick up the prescription DB1.DBD0 DB1.DBD50 up and load these values in a Set Point. Since already thanks

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9/11/2011 3:30 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 1/5/2026 Posts: 6892 Rating: (1368)	Martins_Eng Dear hdhosseini. That way I could do, I create recipes like 8 DBs where the User will enter the set points, and each will run separately or DB when a DB is being used other Irai get off, there have to load the DB on the set FB 41 points of what I have. It has a way to create a pointer to pick up the prescription DB1.DBD0 DB1.DBD50 up and load these values in a Set Point. Since already thanks Dear Martins_Eng As I understood your requirements ,you want to preselect 8 different setpoints be stored in 8 different 32bit-cells in a datablock and insert one of them according to some criteria to FB41.To do so, you may have several options such as Jump Distributor.See the following codes which is extracted from STEP7 online manual.As you may have jumps when you change the setpoints, it is much better to use a rate limiter function to change STEPs to RAMPs to avoid undesired reaction of process. [code]L MB0 //Load jump destination number into ACCU 1-L-L. JL LSTX //Jump destination if ACCU 1-L-L > 3. JU SEG0 //Jump destination if ACCU 1-L-L = 0. JU SEG1 //Jump destination if ACCU 1-L-L = 1. JU COMM //Jump destination if ACCU 1-L-L = 2. JU SEG3 //Jump destination if ACCU 1-L-L = 3. LSTX: JU COMM SEG0: * //Permitted instruction * JU COMM SEG1: * //Permitted instruction * JU COMM SEG3: * //Permitted instruction. * JU COMM COMM: * *[/code] Best regards
	Demo Channel on Youtube
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9/11/2011 4:23 PM	Rate (0)
Martins_Eng Experienced Member Joined: 7/17/2010 Last visit: 11/12/2025 Posts: 189 Rating: (0)	Dear Colleague liked your application and will be implemented in an application that you have but to load the recipes that had said before the function SFC 20 used to move a DB "recipes" for the DB Set-poin. It was this way: A M 0.0 JNB _001 CALL "BLKMOV" SRCBLK :=P#DB74.DBX0.0 BYTE 44 RET_VAL:=MW10 DSTBLK :=P#DB2.DBX0.0 BYTE 44 _001: NOP 0 I'm finishing all the DB to generate revenue to put the Ellipse and evetuar a test but during a brief two recipes worked well.

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