BECKHOFF-NA03-Tc_BC_IL(v1.1)

7/26/2019 BECKHOFF-NA03-Tc_BC_IL(v1.1)

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Beckhoff TwinCATThe Windows Control and Automation Technology

NOTA DE APLICAO 03Princpios bsicos da programao de PLC paraBC e IL230x-Cxxx com TwinCAT PLC

BRESIMAR (asaTek)[email protected](v1.1)Janeiro/2009


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Bresimar - Sociedade de Equipamentos Elctricos, Lda.

Geral (Sede)

Quinta do Simo - EN109 - Esgueira

Apartado 30803801-101 AveiroPORTUGALTelf . +351 234 303 320Telm . +351 939 992 222Fax +351 234 303 328/[email protected]


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Using BC and IL230x-Cxxx as a Stand-Alone PLC

Table Of Contents

1. Introduction ....................................................................................................................3

1.1. PLC Boxes (IL230x-Cxxx)............................. ...................................................................... 3

1.2. BC9000 and IL230x-C900................................................................................................... 3

1.3. Firewall and Anti-Virus Programs ....................................................................................... 3

2. BC I/O System Configuration ....................................................................................................42.1. Configuration for BC9000 and IL230x-Cxxx via Ethernet ................................................. 4

2.1.1. Settings the IP Address ................................................................... ............................ 4

2.1.2. Scan Ethernet network ............................................................................................ .... 4

2.1.3. Compatible Terminal Types ....................................................................... ................ 7

2.1.4. Download BC9000 Configuration via Ethernet ......................................................... 8

2.2. Configuration for BC and IL230x-Cxxx via Serial Connection ........................................ 10

2.2.1. Add I/O Terminals to BC .................................................................................... ...... 13

2.2.2. Download Configuration via Serial Connection ....................................................... 15

2.3. Saving TwinCAT System Manager Configuration File .................................................... 16

3. Creating the BC PLC Project .................................................................................................. 17

3.1. Create PLC Project ................................................................................ ............................. 17

3.2. BC Input and Output Process Images ................................................................................. 19

3.3. Writing the BC PLC Program ............................................................................. ............... 21

3.4. Compiling the BC PLC Program ............................................................... ........................ 22

4. Downloading BC PLC Project................................................................................................. 24

4.1. Select Target BC9000 for Ethernet Connection ................................................................ 24

4.2. Configure COM Port for Serial Connection ...................................................................... 26

4.3. Download BC PLC Program ............................................................................................. 27

4.4. Editing BC PLC Program........................................................................... ........................ 30

4.5. Create BC Boot Project ..................................................................................................... 31

5. Checking BC Input and Output Images ................................................................................ 32

5.1. Export BC Input and Output Images ....................................................... .......................... 32

5.2. Import BC Input and Output Images ....................................................... .......................... 336. BC Program Cycle Time ......................................................................................................... 35

Version Updated Changes

V1.2 22/11/2004 Notes for programming BC9000 via Ethernet added

Reference to IP67 PLC Boxes added

V1.3

V1.4

8/12/2004

14/6/2005

Example configuration using serial connection changed to BC3100

to distinguish from BC9000 via Ethernet

Warning to disable firewalls added

Changing non-PLC terminal to PLC terminals added

Changing terminal-type to a compatible type added

Updated: 15/06/2005 Page 2 of 38 Revision: 1.4


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1. Introduction

The BC series of bus controllers have a single PLC task that can be used to implement a

PLC program to interact with the I/O terminals connected to it. This allows the BC to be

used as a stand-alone PLC controller, and is configured using a serial connection

between the PC and the BC.

All screen captures have been taken using TwinCAT V2.9.0. Older versions of TwinCAT

may vary slightly from the screens shown in this document.

1.1. PLC Boxes (IL230x-Cxxx)

PLC Boxes are part of Beckhoffs IP67 range of I/O and are functionally identical to the

BC range of bus controllers. This document uses a BC controller to demonstrate the

different procedures, but all information applies equally to the IL230x-Cxxx range.

NOTE: the serial leads required for the BC and IL230x-Cxxx ranges are different.

1.2. BC9000 and IL230x-C900

BC9000 and IL230x-C900 have Ethernet fieldbus ports, and both can be programmed via

the Ethernet port for the serial connection port. As many modern lap-top computers

have built-in Ethernet ports, but no serial communication ports, the Ethernet connectionis a popular method of programming the BC9000 and IL230x-C900.

The procedures for programming these devices via Ethernet are different in some areas

from the serial connection. If a section heading does not indicate Ethernet or Serial

Connection, the section applies to both methods.

1.3. Firewall and Anti-Virus Programs

Firewalls and some anti-virus programs are known to interfere with TwinCAT traffic over

Ethernet, and can cause problems when using a PC to program a BC9000 or IL230x-C900

via Ethernet.

Wherever possible, firewalls should be disabled completely on a PC being used to

configure a remote TwinCAT device via Ethernet. If this cannot be done, a trusted

zone must be configured for the range of IP addresses in use on the TwinCAT network,

although this does not prevent some firewalls from interfering with TwinCAT traffic.

Norton Personal Firewall is known to cause problems in this respect.



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2. BC I/O System ConfigurationI/O terminals in a BC can be attached to the BC PLC or sent directly to the fieldbus port.

In stand-alone mode, any terminals not attached to the BC PLC will not be accessible

within the PLC program. The procedure described in this section ensures that any

previous I/O configuration in the BC will be over-written with the new I/O configuration.

2.1. Configuration for BC9000 and IL230x-Cxxx via Ethernet

2.1.1. Settings the IP Address

All BC9000 and IL230x-Cxxx devices on the network must be assigned an IP address

before they can have their I/O configuration and PLC program downloaded. Refer to

Assigning IP Addresses to Beckhoff Ethernet Devices for further details.

2.1.2. Scan Ethernet network

The Ethernet network must be scanned to allow TwinCAT System Manager to find any

BC9000 and IL230x-Cxxx devices that are available on the network, and make them

available later as target devices for the PLC program. In addition, any terminals

connected to the device can be scanned to check the current I/O configuration.

To scan the Ethernet network:1. Right click I/O Devices

2. Select Append Device



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3. Select Virtual Ethernet Interface

4. Click OK

5. Right click on the Ethernet device

6. Select Scan Boxes



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7. Select the Ethernet device(s) to be configured

8. Click OK

TwinCAT System Manager will add the selected devices to the Ethernet master, scan theterminals connected to the devices and display the terminal configuration found.

TwinCAT System Manager



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Any terminals that do NOT have PLC next to them are assigned to the process image of

the Ethernet port. To assign these terminals to the BC PLC process image:

1. Right click on the terminal to be deleted

2. Select Delete Terminal

3. Click OK to delete the terminal

2.1.3. Compatible Terminal Types

Several Beckhoff I/O terminals are functionally identical to other terminals, so TwinCAT

System Manager cannot always detect exactly what type of terminal has been found.

To correct the list of terminals fitted to a device:

1. Right click on the terminal that is to be changed

2. Select Change to Compatible Type

3. Select the actual terminal fitted.



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2.1.4. Download BC9000 Configuration via Ethernet

If any I/O terminals are not listed as PLC terminals, they are assigned to the Ethernet

port. To over-write the existing I/O configuration:

1. Click on the Activate Configuration icon ( )

2. Click Yes to generate the project mappings

3. Click OK to generate the project mappings

4. Click OK to acknowledge the Ethernet sync master warning



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5. Click OK to restart the system in run mode, and download the updated I/O

configuration to the BC9000

TwinCAT System Manager will indicate that the local system is now running, and

TwinCAT PLC will be able to access the BC9000 to download the PLC program.



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2.2. Configuration for BC and IL230x-Cxxx via Serial Connection

A fieldbus system has to be created to allow the I/O configuration to be created and

downloaded to the BC or IL230x-Cxxx. This ensures that any previous I/O configuration

will be over-written with the new configuration.

To specify the I/O for a stand-alone BC or IL230x-Cxxx:

1. Right click I/O Devices

2. Select Append Device

3. Select a master controller appropriate for the BC controller you are using. This

example will use a BC3100, so a PROFIBUS-DP master controller must be selected

4. Click OK



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TwinCAT System Manager will list any PROFIBUS master devices found on the system.

5. Click Cancel

6. Right click on the fieldbus master controller

7. Select Append Box



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8. Select the required BC or IL230x-Cxxx fieldbus controller

9. Click OK

TwinCAT System Manager will show a master controller with a slave BC or IL230x-Cxxx

controller. The example system below shows a PROFIBUS-DP master controller with a

BC3100 connected.



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2.2.1. Add I/O Terminals to BC

To add terminals to the BC or IL230x-Cxxx controller:

1. Right click on the controller

2. Select Append Terminal

3. Select the required group of (BC PLC) terminals



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4. Select the terminal type required.

5. Specify the number of terminals required.

6. Click OK

TwinCAT System Manager will add the selected terminals to the controller. Steps 1 to 6

should be repeated until all required terminals have been added.



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2.2.2. Download Configuration via Serial Connection

When the I/O configuration has been created for the BC, it must be downloaded to the

BC or IL230x-Cxxx using the serial connection.

To download the configuration to the controller:

1. Right click on the BC or IL230x-Cxxx controller

2. Select Terminal Configuration COMx

3. Select COM Port

4. Specify the COM port that is connected to the BC or IL230x-Cxxx



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TwinCAT System Manager will download the configuration to the controller. When

download is complete, the TwinCAT System Manager will ask to reset the device to

activate the new configuration.

5. Click Yes

2.3. Saving TwinCAT System Manager Configuration File

Even though the fieldbus network created in TwinCAT System Manager is a dummy

network, the TwinCAT System Manager configuration should be saved as part of the BC

or IL230x-Cxxx project files. If the configuration is lost or over-written in future, the

original configuration can be restored at a later date.



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3. Creating the BC PLC Project

3.1. Create PLC Project

To create a new PLC project for the BC or IL230x-Cxxx in TwinCAT PLC:

1. Select the New icon ( ) in TwinCAT PLC

2. Select target device and the download method to be used:BC via AMS or BCxx50 or BX via AMS for BC9000 via Ethernet

BC serial or BCxx50 or BX via serial for BC via serial connection

3. Click OK



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4. Select Program as the the type of Program Organisation Unit (POU)

5. Select the programming language for the POU. The following languages can be

used in TwinCAT PLC:

IL Instruction List

LD Ladder

FBD Function Block Diagram

SFC Sequential Function Chart

ST Structured Text

CFC Continuous Function Chart

TwinCAT PLC will create a new blank PLC project for the BC controller.



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3.2. BC Input and Output Process Images

The input and output process images are fixed in a BC for a given configuration of

terminals. It is important to know how the input and output images are structured to

ensure that the PLC input and output images correspond to the correct inputs and

outputs.

NOTE: this note assumes that only compact analogue and digital inputs and

outputs were used in the I/O configuration using TwinCAT System Manager.Working along the K-bus from the BC:

1. Analogue terminals are added to the process images starting at %IW0and %QW0,

and are added in the order in which they are found.

2. Each channel on compact analogue terminals uses 2 bytes of data.

3. Digital terminals are added to the process images starting AFTER the analogue

inputs and outputs, and are added in the order in which they are found.

4. Each channel on a digital terminal will use 1 bit of data, and is assigned to the

next available bit.

NOTE: if no analogue terminals are fitted, the digital inputs and output will start

in the process image at%IW0and%QW0.

In the example configuration, the analogue inputs and outputs have been declared ascompact terminals, so each analogue terminal will use the first 4 data bytes. Digital

terminal mapping will start at %IX4.0and %QX4.0.

Analogue Terminals

KL3002

KL4032

Digital Terminals

KL1002

KL1002

KL2032

KL2032

Updated: 15/06/2005

Channel

1

2

1

2

1

2

1

2

1

2

1

2

Input Image

%IW0

%IW2

----

----

%IX4.0

%IX4.1

%IX4.2

%IX4.3

----

----

----

----

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Output Image

----

----

%QW0

%QW2

----

----

----

----

%QX4.0

%QX4.1

%QX4.2

%QX4.3

Revision: 1.4


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The input and output process images can now be declared for the program, and

variables assigned to each input and output. The lines of code required are shown

below. It is advisable to declare input and output variables as global variables to ensure

that they can be accessed from all program modules.

VAR_GLOBAL

(* Inputs *)

AnIn1

AnIn2

DigIn1

DigIn2

DigIn3

DigIn4

AT %IW0

AT %IW2

AT %IX4.0

AT %IX4.1

AT %IX4.2

AT %IX4.3

:

:

INT;

INT;: BOOL;

: BOOL;

: BOOL;

: BOOL;

(* Outputs *)

AnOut1 AT %QW0 : INT;

AnOut2

DigOut1

DigOut2

DigOut3

DigOut4END_VAR

AT %QW2

AT %QX4.0

AT %QX4.1

AT %QX4.2

AT %QX4.3

: INT;

: BOOL;

: BOOL;

: BOOL;

: BOOL;

To declare input and output variables as global variables:

1. Click on the Resources tab

2. Double click Global_Variables

3. Enter the input and output variable declarations as required. Any variables

declared here will be available to all program modules (POUs) in the BC program.



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3.3. Writing the BC PLC Program

The BC PLC program was declared as MAIN and the programming language selected

was LADDER. MAIN is the first POU to run when the BC boots up, but all code added to

MAIN must be written in LADDER. Additional POUs may be created and written in any

available language, and these can be called from MAIN as required.

The example screen below shows a BC program consisting of a single POU and written in

LADDER. There are no variables declared in MAIN as the inputs and outputs have alreadybeen declared globally.



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3.4. Compiling the BC PLC Program

The PLC program must be compiled without errors before it can be downloaded to the

BC. To compile the PLC program:

1. Select Project

2. Select Rebuild all



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TwinCAT PLC will compile the program and check for errors. If any errors are found,

they will be displayed in the window beneath the program window, along the position in

the program where the error was found.

In the example below, the program has compiled successfully with no errors and no

warnings.



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4. Downloading BC PLC Project

Once the PLC program has been compiled, it must be downloaded to the BC.

4.1. Select Target BC9000 for Ethernet Connection

To select the BC9000 as the target device for the PLC program:

1. Select Online

2. Select Choose Run-Time System



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3. Double click on the BC9000 device

4. Select Run-Time 1 (Port 800) for the BC9000

5. Click OK

TwinCAT PLC will show the BC9000 as the target system for the PLC program in the red

box at the bottom of the screen.



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4.2. Configure COM Port for Serial Connection

To configure the COM port of the PC:

1. Select Online

2. Select Communication Parameters

3. Select the Baud rate for the BC. Default baud rate is 19200

4. Select the COM port to be used on the local PC

5. Set the number of Stop Bits to 1

6. Set the Parity to Even

7. Click OK



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4.3. Download BC PLC Program

The PLC program download procedure is the same for a BC9000 via Ethernet and a BC via

serial connection. To download a PLC program to the BC:

1. Select Online

2. Select Login

If the BC does not currently have a program loaded, it will ask if you want to download

the new program.

3. Click Yes



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To start the newly downloaded program:

4. Select Online

5. Select RUN



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TwinCAT PLC will display the current run status is green at the bottom of the screen.

The current state of each rung of the LADDER program can also be seen while TwinCAT

PLC is on-line.



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4.4. Editing BC PLC Program

Changes to the BC PLC program cannot be made while TwinCAT PLC is logged on to the

BC. To make changes to the PLC program:

1. Select Online

2. Select Logout

TwinCAT PLC will go off-line, and the PLC program can be edited. When the required

changes have been made, the program must be re-compiled and downloaded to the BC.

(Refer to section 3.4, Compiling the BC PLC Program on page 22 and section 4.3,

Download BC PLC Program on page 27.)



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4.5. Create BC Boot Project

The BC Boot Project is the program that runs automatically when the BC boots-up after

a full reset or power-up. To create the BC Boot Project:

1. Select Online

2. Select Create Bootproject

TwinCAT PLC will create the boot project in the BC. When this process is complete:

3. Click OK to finish.



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5. Checking BC Input and Output ImagesThe BC input and output process images can be exported from TwinCAT System Manager

and imported into TwinCAT PLC. This allows the user-generated BC input and output

images to be checked against the exported images.

However, it is not recommended to rely on the export/import method for generating the

input and output images. Under TwinCAT System Manager, input and output terminals

dedicated to the BC PLC cannot be given user names, and the exported variable namesare fixed.

The exported variable names may be changed AFTER they have been imported into the

BC PLC program to make them easier to use in the PLC program. However, if the

variable names were to be re-imported at a later date due to a change in the I/O

configuration, the modified names would be lost.

5.1. Export BC Input and Output Images

To export the BC variable information:

1. Right click on the BC

2. Select Export Variable Info



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3. Specify a location to save the file

4. Specify a name for the export file

5. Click Save

5.2. Import BC Input and Output Images

To import the variable information file into TwinCAT PLC:

1. Select Project

2. Select Import



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3. Select the file to be imported

To view the imported input and output image variable information:

4. Select the Resources tab

5. Double click on TwinCAT_Import

The imported input and output process images are shown in the variable declaration

window. These can be compared with the user-generated input and output process

images to ensure that no mistakes have been made.



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6. BC Program Cycle TimeTo start the cycle time measurement of the BC PLC program:

1. Select Online

2. Select Coupler

3. Select Start Cycle Time Measuring



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To stop the cycle time measurement of the BC PLC program:

4. Select Online

5. Select Coupler

6. Select Stop Cycle Time Measuring



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To view the cycle time measurement of the BC PLC program:

7. Select Online

8. Select Coupler

9. Select Read Cycle Time Measuring



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The measured PLC cycle times will be displayed. The Minimum and Maximum PLC cycle

times are displayed, along with the Middle cycle time. The Actual cycle time is the

average measured PLC cycle time taken over the number of measured cycles.



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Documents

BECKHOFF-NA03-Tc_BC_IL(v1.1)