Siemens Top Mistakes

8/20/2019 Siemens Top Mistakes

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Navigating the world of automation

2011 Automation SummitOrlando, FL



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Copyright © Siemens Industry, Inc. 2011. ll rights reserved.

!age 2

2011 Automation Summit

Title: Top Ten Programming i!ta"e! ade #$

People New to S%

Tra&":'()

Topi&: Learn a#out !ome of the &ommon

pro#lem! e*perien&ed #$ people learning S%+

Pre!enter: Tim ager

-ompan$: .-

Top Ten Programming i!ta"e! ade #$ People New to S%


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Top Ten Programming i!ta"e! ade #$ People New to S%

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/0 mplo$ee!

-ompan$ Profile

Sin&e 1)

#ased In

Chicago$

$%ut wor&

'lo%ally

()C has the highest num%er of

S% certified engineers


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Our &u!tomer!


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anufa&turing and Automation ntelligen&e

i&ro!oft SharePoint -on!ulting Servi&e!

Te!t and ea!urement

-u!tom Software ngineering 3 m#edded S$!tem!

Area! of *perti!e


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.ulle! Airport Tran!it Tunnel 4entilation S$!tem *inCC +edundancy S -00 +edundant !/C -000 I !oints

5elevant Siemen! Pro6e&t!


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7at&h i*ing S$!tem! for -onfe&tionar$ -ompan$

S"00 Standardi3ed code %ase (eployment at multiple facilities )i4ing%atching control +ecipe management *e%%ased reporting system



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Automotive A!!em#l$ Line! for Tier 1 Supplier

S -00 !/C5s *inCC 6le4 )I5s Standardi3ed code %ase 7ser Configura%le 8I9 /ean )anufacturing (eployment at multiple facilities



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8S Nav$ L-S91

Littoral -om#at Ship

S -00 +edundant !/C

)ission Critical /ogic



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Pre!enter nfo

9im 8ager

!ro:ect (irector at ()C

)echanical ;ngineer >>


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Top 10 S% i!ta"e!

'1

!age 12

Simple ardware mista&es


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-ommon ardware i!ta"e!

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$ PL- .oe!n;t


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!age 1-

It needs a memory card

$ PL- .oe!n;t


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!age 1?

It needs a memory card

It5s in S9! )ode

$ PL- .oe!n;t


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!age 1@

wonder what;! on the - -ard=


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!age 1



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!age 1>


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!age 20

9his is not an +S2"2 Serial !ortBBB


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Top 10 S% i!ta"e!

'2

!age 21

7sing %solute

ddress !riorityinstead of Sym%olic


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Set $our Addre!! Priorit$ to S$m#oli&

ou 8ust too& the 5ed pill$. ou are on your way down the ra%%it hole that leadsdown the path of true o#6e&t oriented PL- Programming+

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A T$pi&al .ata 7lo&"

.71 >d#?lo#al!@

!age 2"


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A T$pi&al .ata 7lo&"

.71 >d#?lo#al!@

!age 2-

ddressD

(#1.(#E0+0

Sym%ol NameD

Fd%'lo%alsG.%Start


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A T$pi&al 5ung Of Ladder

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!age 2@

ddress /ogic

Sym%olic /ogic


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!age 2

ddress /ogic

Sym%olic /ogic


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A#!olute v!+ S$m#oli& Priorit$

!age 2>

In Sym%olic )ode the intended logic is maintained

9he address logic haschanged from 0.1 to 0.2

9he sym%olic logic is

maintained


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#ut the Sym%olic logic is

totally wrongB

9he ddress logic ismaintained

In %solute )ode the intended logic is N9 maintainedB


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A#!olute Addre!!

2222N. ;lston ve

Chicago, I/ @0@1-

S$m#oli& Addre!!

tim.:agerHdmcinfo.com

4S+

ou don5t have to &now where the server lives or it5s I! address. ou :ust need thesym%olic name to send an email.

So start forgetting a%out addresses and start thin&ing a%out sym%olic names.


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Top 10 S% i!ta"e!

'/

!age "2

I )apping


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B ?ONNA P5O?5A LC TBS 1

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nput D Output apping


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Traditional nput D Output apping

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1. t the %eginning of the scan,

;ach physical input gets mapped

to an internal varia%le$

!hysical Input

Internal aria%le


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2. Now run all of the logic


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2. Now run all of the logic


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Copyright © Siemens Industry, Inc. 2011. ll rights reserved.!age "

S% DO apping E u!t u!e the S$m#ol Ta#le

)a&e sure you are inSym%olic !riority )ode


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Top 10 S% i!ta"e!

'

!age "A

Improper 7se of #it )emory

JD #it!

7it!


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Copyright © Siemens Industry, Inc. 2011. ll rights reserved.!age ">

0+0

0+1

0+2

0+/

0+

0+(0+)

0+%

1+0

1+1

1+2

1+/

1+

1+(

1+)

1+%

2+0

2+1

2+2

2+/

2+

2+(

2+)2+%

/+0

/+1

/+2

/+/

/+

/+(

/+)/+%

)0.0 K )0.

)1.0 K )1.

)2.0 K )2.

)2.0 K )2.

7it!

7it! 7$te!


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Copyright © Siemens Industry, Inc. 2011. ll rights reserved.!age -0

0+0

0+1

0+2

0+/

0+

0+(0+)

0+%

1+0

1+1

1+2

1+/

1+

1+(

1+)

1+%

2+0

2+1

2+2

2+/

2+

2+(

2+)2+%

/+0

/+1

/+2

/+/

/+

/+(

/+)/+%

)#0)0.0 K )0.

)1.0 K )1.

)2.0 K )2.

)2.0 K )2.

)#1

)#2

)#"

$

7it! 7$te!


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0+0

0+1

0+2

0+/

0+

0+(0+)

0+%

1+0

1+1

1+2

1+/

1+

1+(

1+)

1+%

2+0

2+1

2+2

2+/

2+

2+(

2+)2+%

/+0

/+1

/+2

/+/

/+

/+(

/+)

/+%

)#0)0.0 K )0.

)1.0 K )1.

)2.0 K )2.

)2.0 K )2.

)#1

)#2

)#"

$

)*0

)*1

7it! 7$te!


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0+0

0+1

0+2

0+/

0+

0+(0+)

0+%

1+0

1+1

1+2

1+/

1+

1+(

1+)1+%

2+0

2+1

2+2

2+/

2+

2+(

2+)2+%

/+0

/+1

/+2

/+/

/+

/+(

/+)

/+%

)#0)0.0 K )0.

)1.0 K )1.

)2.0 K )2.

)2.0 K )2.

)#1

)#2

)#"

$

)*0

)*1

)(0


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Top 10 S% i!ta"e!

'(

!age ->

Not using or

Improperly using theCloc& #yte


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S$m#ol Ta#le ntr$ For -lo&" 7$te

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+eserve these so no%ody uses )emory overlapping the Cloc& #yte


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-lo&" 7$te

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9he %its within the Cloc& %yte can change at

any time during the scan.


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-lo&" 7$te E S$n&hronou! ?lo#al

!age ?"

8.T1 >udt-lo&"7$te@


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!age ?-

.71 >d#?lo#al!@


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!age ??

.71 >d#?lo#al!@


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!age ?@

.71 >d#?lo#al!@


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!age ?

)#0 d%'lo%als.Clocyte


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Copyright © Siemens Industry, Inc. 2011. ll rights reserved.!age ?>

0+0

0+1

0+2

0+/

0+

0+(

0+)

0+%

Cloc& #yte

)apped to )#0

FlwaysP6alseG

)apped to )0.0

FlwaysP9rueG

)apped to )0.1


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Overlapping #it! are 7A.

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Top 10 S% i!ta"e!

')

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7sing 7ninitiali3ed

9emp )emory


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mproper 8!e of Temp emor$

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mproper 8!e of Temp emor$

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(on5t read from a 9;)!

unless you have written to it

firstB


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Top 10 S% i!ta"e!

'%

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Not 7sing 9imed

Interrupts.


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O71 v!+ O7/0++/I

!age @@

O71

5un! a! fa!t a! it &an+

O7/0O7/I

5un at !pe&ifi& time interval!+


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Timed nterrupt! O7/0++O7/I

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P. -ontrol .ata Sampling


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Top 10 S% i!ta"e!

'I

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Not using reusa%le

function %loc&s


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6unction #loc& is a piece of reusa%le code that consists ofD

Code is encapsulated in a ighly reusa%le form

Increases !rogramming efficiency and reduces errors


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ne of the simplest and mostcommonly used function %loc& is a

Timer .

TON

IN

T#200ms PT ET 178

Q


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-reation of Fun&tion 7lo&"

Isolate Common(uplicate Code

If the same code is used many times in your program, consider

creating function blocks.


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Step 1. locate common code.




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Step 1. locate common code.




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Step 2. Replace duplicated code with function blocks.



Custom FB Examples


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Custom FB Examples)otor

6#

!ump

6#

Cylinder

6#

#arcode

Scanner

6#

/a%el

!rinter

6#

alve

6#

)achine

ision

6#

+o%ot

Interface

6#


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Top 10 S% i!ta"e!

'

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Inconsistent #loc&s


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-he&" 7lo&" -on!i!ten&$

!age

(on5t forget to download the (ata #loc&BB


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Top 10 S% i!ta"e!

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nd last %ut not least$$..


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Top 10 S% i!ta"e!

'10

!age >

'oing it lone

Than" Mou


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Than" Mou

Siemens Top Mistakes

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