2012 Automation Summit Washington, DC · PDF fileNavigating the World of Automation 2012 Automation Summit Washington, DC Community. Experiences. Productivity

Navigating the World of Automation

2012 Automation Summit Washington, DC

Community. Experiences. Productivity.

Navigating the World of AutomationCopyright © Siemens Industry, Inc. 2012. All Rights Reserved.

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2012 Automation Summit

Title: Creation of a Custom Library Based on the APL Style Guide

Track: Novel Approaches to ProblemResolutions, Including Tips and Tricks

Topic: Customization of APL Functions

Presenter: Harry Pigler

Company: Pigler Automation, LLC


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� Pigler Automation, LLC was founded in 2005 by Karen and Harry Pigler after 17/20 years of employment with various Siemens organizations in both Germany and the United States

� System Integrator for PCS7 and S7 Process Control Applications

� Located in Firestone, Colorado -- 30 miles north of Denver

� 5 Employees and Growing

� Industries Served: Oil and Gas, Power, Pharmaceutical and Mining

For more information please visit: www.piglerautomation.com

Or call : (866) 871-1456

Providing Excellence in Process Automation

Pigler Automation, LLC


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Harry Pigler

Education and Employment� Born and raised in Germany� Electrical Engineering Degree from Universität Erlangen-Nürnberg, Germany� 20+ years employment with Siemens in Germany and the US� Managing Member of Pigler Automation, LLC since 2005

PCS7 Experience• First contact with PCS7 in 1996 : Developing add-ons for PCS7 to be applied

in the Power Industry (PCS7 V3)• Lead System Engineer in the TVA Hydro Automation Project:

Retrofitted 29 Hydro Plants with PCS7 to be Operated from one Central Headquarter

• As Managing Member of Pigler Automation: the main focus is to support our Customers with their PCS7 Installation, Improvement and Addition needs


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The Challenge

Supervisory Control for a Hydro Power Unit

Requirement from the Customer:Provide a compact representation for a Hydro Power Unit which displays all important statuses, as well as allows for mode changes and the entry of set points

Focus On:-Two analog set points (Active and Reactive Power) -Mode selector for multiple states (Local, Manual, Semi-Automatic, Automatic)

Solution with Standard PCS7 APL:� The Advanced Process Library does not have such a specialized object out of

the box (who does?)� However, it is possible to create such an object by utilizing existing APL

elements (with some effort)


PCS7 Typicals : 101

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WinCC

S7 Controller

Function Block

Block Icon

Faceplate


PCS7 Advanced Process Library

Siemens provides the PCS7 User with extensive libraries for both the Controller as well as the HMI

The APL scope of delivery includes:• A comprehensive Function Block library with a detailed manual and online

help• Block Icons for Function Blocks with HMI relevance. User can select from

different representations (@PCS7TypicalsAPL.pdl)• Associated Faceplates, invoked by the Block Icons, that represent functions

allowing for Operator commands

For customization:• APL Style Guide: a detailed manual for customization of Function Blocks,

Block Icons and Faceplates• @PCS7ElementsAPL.PDL: building blocks for Faceplate customization

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Out of the Box Solution

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If only existing elements are utilized:

� multiple Function Blocks are needed� multiple Block Icons are placed on

the screen� multiple Faceplates used

Cannot fulfill the one compact objectrequirement!!

Let’s build a customized Function Block, with a matching Block Icon and Faceplate!


Part 1: The Function Block

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First Step: the Function Block1) Find an existing Function Block that comes

close to what you need. For this example we will use an OpAnL(Operator Analog Signal Input) as a starting point

2) In the Project Library � create a new Chart � place the Block



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Create the I/O frame of the Function Block

� At least every I/O relevant for the HMI needs to be included

� Drag and Drop inputs and outputs to the CHART I/O section



Compile Chart to Function Block

� Ensure the S7_m_C attribute is set!

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Creates a SCL program with proper I/O definition; ready to add additional I/Os and to develop the algorithm



Change I/O names to match the Function

Add I/Os where needed Use existing I/Os as a template

NOW WRITE CODE

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NOTE: MODE / STATUS DWORD

� APL uses WORDs or DWORDs to communicate statuses between the HMI and the Controller

� ATTENTION: There is a difference between accessing a Bit in a WORD or DWORD in the Controller versus WinCC.

0-31

16-3124-31

16-23

0-158-15

0-7

DWord

WordByte

0

1

2

3


How to use MODE DWORD

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Mode1{S7_visible:='false';S7_m_c := 'true'}:DWORD:=16#0000;

ModeBits AT Mode : ARRAY[0..31] OF BOOL;

//ModeBits[0] - Unit in Local Control - 24

//ModeBits[1] - Unit in Manual Control - 25

//ModeBits[2] - Unit in Semi-Automatic Control - 26

//ModeBits[3] - Unit in Automatic - 27

Mode1{S7_visible:='false';S7_m_c := 'true'}:DWORD:=16#0000;

ModeBits AT Mode : ARRAY[0..31] OF BOOL;

//ModeBits[0] - Unit in Local Control - 24

//ModeBits[1] - Unit in Manual Control - 25

//ModeBits[2] - Unit in Semi-Automatic Control - 26

//ModeBits[3] - Unit in Automatic - 27

IF FB_Local THEN

Mode1:=16#00000000; //clear all older bits

ModeBits[0]:=1;

END_IF;

IF FB_Local THEN

Mode1:=16#00000000; //clear all older bits

ModeBits[0]:=1;

END_IF;



The new Function Block is in the Project Library

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Part 2: The Block Icon

� A Block Icon Type has a fixed association with a Function Block Type.� A Block Icon can be pre-placed on a screen when compiling WinCC.� All existing Block Icons are stored in the file: @PCS7TypicalsAPL.PDL� Naming convention for the Custom Library:

@PCS7TypicalsAPL<ADDON>.PDL �Example: @PCS7TypicalsAPL_PA.PDL

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� PCS7ElementsAPL.PDL contains building blocks for Faceplates and Block Icons



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� Copy the OpAnL Block Icon

� Use the ‘Customize Object’ function to modify the Block Icon graphic



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� Once the graphic is completed, configure the interface



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� Adjust the Type reference

� Block Dynamic is entered with the I/O Name only – WinCC Compile will complete the Tag Name


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Part 3: The Faceplate

� Copy the OpAnL Faceplate files in the GraCS folder and rename them:


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� Open the “Standard” view and adapt as needed

• Need additional modes other than “On” and “Out of Service”

• Need two PV/SP combinations

• Need two bar charts


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� New Elements placed � Object Properties need to be adapted


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� Mode changes


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� Verify all scripts


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� Duplicated Elements � Add to scripts


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� View List Changes for the Open Picture script and the “Next View” button

If no Batch tab is needed,Set BATCH to “FALSE”


In Conclusion

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� Find a Function that is close to what you need as a starting point. Beats starting from scratch!

� Due to the complexity of APL, it might be easier to isolate an aspect and make it work; then integrate it in the final product

� Never underestimate the time it takes to thoroughly test a customized Function Block, Block Icon and Faceplate!

� Check for Script Errors and fix them!

� Changes in the I/O Interface of the Function Block require a CPU stop to load them into the Controller


More Information

For more information please visit: www.PiglerAutomation.com

Or call : (866) 871-1456Email: [email protected]

Thank You!

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Documents

2012 Automation Summit Washington, DC · PDF fileNavigating the World of Automation 2012 Automation Summit Washington, DC Community. Experiences. Productivity