S5 code to write to DB data

userxyz

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• May 19, 2010

• #1

Hi,

As an S7 programmer I do miss some S5 knowledge. Especially in german.



I need to write value 50 or 150 to DB101 var 11. As you can see the value is now 50, I guess that this can be overwritten with S5 code ?

This is what I want to write:

U E6.0
JCN =NEXT

A DB101
L 75
T DW 11
JU =END

NEXT:
A DB101
L 150
T DW 11
END:

But offcourse, some instructions are faulty. Can anyone help with this ? Thanks.

Kind Regards,
Gerry

 

Jeebs

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• May 19, 2010

• #2

Code:

    U E6.0
    JCN =NEXT
 
    A DB101
    L KF +75
    T DW 11
    JU =END

NEXT: [COLOR=Red]Something missing here. Either NOP 0 or you start directly with A DB101[/COLOR]
    A DB101
    L KF +150  
    T DW 11
END: [COLOR=Red]If this is the end of the block, then in stead of JU =END, use BEU. If you use JU, then you need to add NOP 0[/COLOR]

Sure you can't change to English?

 

userxyz

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• May 19, 2010

• #3

...

I'm not sure, but I think I have installed S5 für Windows (german).

Found some code that illustrated a jump (SPB)

I think this will be better, but I'm not sure (BEU = BEB in german I think):

;A DB101

U E6.0
SPB =M001
L KF +75
T DW 11
BEB
M001:
L KF +150
T DW 11
BE

 

Last edited: May 19, 2010

Jeebs

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• May 19, 2010

• #4

Code:

    :A DB101
    :
    :U E6.0
    :SPB =M001
    :L KF +75
    :T DW 11
    :BEA
M001:L KF +150  
    :T DW 11
    :BE

That should work.

 

userxyz

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• May 19, 2010

• #5

Thanks

Thanks Jeebs !!

Jeebs said:

Code:

    :A DB101
    :
    :U E6.0
    :SPB =M001
    :L KF +75
    :T DW 11
    :BEA
M001:L KF +150  
    :T DW 11
    :BE

That should work.

Click to expand...

 

userxyz

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• May 20, 2010

• #6

Uploading OB251

I know that DB101 DW11 is a parameter that influences a PID speed. But I wanna know if it's the I parameter. I tried to upload OB251 (where the PID is written), but I couldn't. Should the CPU be in stop to upload this special block ?

Regards,
Gerry

Combo said:

Thanks Jeebs !!

Click to expand...

 

L D[AR2P#0.0]

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• May 20, 2010

• #7

Which CPU are you using ? OB251 is usually an in-built function.

 

userxyz

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• May 20, 2010

• #8

95u

And what does that mean ?
There must be some PID blocks in the program, but I cannot find them. OB251 is the only block that I can't upload, that's why I think the PID is processed in there ... ?

Don't know S5 very well..

L D[AR2 said:

Which CPU are you using ? OB251 is usually an in-built function.

Click to expand...

 

moggie

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• May 21, 2010

• #9

OB251 is the PID Algorithm OB for S5-95U.
Look here -
http://support.automation.siemens.com/WW/view/en/1091648

 

FARIAM

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• May 21, 2010

• #10

Combo,

In the page 250 of the Manual moggie posted you will find the info about the OB251, which is the PID Control block for the S595U.

You can't upload the block, you just call it cyclically to make it work.

DW11 is the control word for the PID. Before calling the OB251, what you have to do is open (OPN in english, AUF in german) the DB you want as the parameter DB and change the corresponding values, based on the Table of the page 254.

Regards.