CDSIF - Kuhnke

Kuhnke Electronics
Instruction Booklet
CoDeSys System Interface (CDSIF)
DLL for Data Exchange
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CoDeSys
System Interface

KUHNKE Automation CDS System
This instruction booklet is primarily intended for use by design, project, and delvelopment engineers. It does not contain any delivery
information. Data is only given to describe a task solution and must not be regarded as guaranteed properties in the legal sense. Any
claims for damages - on whatever legal grounds - are excluded except for instances of deliberate intent or gross negligence on our part.
We reserve the rights for errors, omissions and modifications.
Reproduction even of extracts only with the editor's express and written prior consent.
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Table of Contents
1 Introduction......................................................................................................................................................5
Communication Strategy Diagram..................................................................................................................5
1.1 Functions..............................................................................................................................................6
2 PLCHandler .....................................................................................................................................................7
2.1 Source..................................................................................................................................................7
2.2 Possibilities of Communication ............................................................................................................7
3 CDSIF.INI ........................................................................................................................................................8
3.1 Header .................................................................................................................................................8
3.2 General Parameters for All Types of Connection ................................................................................8
3.3 Specific Parameters by Type of Connection........................................................................................9
3.3.1 Serial Connection...............................................................................................................................9
3.3.2 CAN Connection.................................................................................................................................9
3.3.3 DPRAM Interfacing with a Slot PLC.................................................................................................10
3.3.4 Shared Memory with Soft PLC SP RTE...........................................................................................10
4 Symbol Configuration ....................................................................................................................................11
5 Installing the CDSIF System .........................................................................................................................13
5.1 Installing Add-ons...............................................................................................................................14
6 CDSIF System Functions ..............................................................................................................................15
6.1 General ..............................................................................................................................................15
6.1.1 Version Info ......................................................................................................................................15
6.2 Connecting with/Disconnecting from PLCHandler and Status ..........................................................15
6.2.1 Connect ............................................................................................................................................15
6.2.2 Disconnect........................................................................................................................................15
6.2.3 PLCHandler Status...........................................................................................................................16
6.3 Synchronous Read.............................................................................................................................17
6.3.1 Synchronous Read of Numerical Variables .....................................................................................17
6.3.2 Reading a Byte.................................................................................................................................17
6.3.3 Reading a Word ...............................................................................................................................17
6.3.4 Reading a Long Word ......................................................................................................................18
6.4 Synchronous Read of Arrays and Structures ....................................................................................19
6.4.1 Synchronous Reading of an Array ...................................................................................................19
6.4.2 Synchronous Reading of a String ....................................................................................................20
6.5 Synchronous Write.............................................................................................................................21
6.5.1 Synchronous Write of Numerical Variables .....................................................................................21
6.5.2 Synchronous Writing of a Byte.........................................................................................................21
6.5.3 Synchronous Writing of a Word .......................................................................................................22
6.5.4 Synchronous Writing of a Long Word ..............................................................................................22
6.5.5 Synchronous Write of Arrays and Structures...................................................................................23
6.6 Browsing Variables ............................................................................................................................24
6.6.1 Getting the Number of Variables......................................................................................................24
6.6.2 Reading the Names of Variables .....................................................................................................24
7 Error Codes ...................................................................................................................................................25
7.1 CDSIF.DLL Error Codes ....................................................................................................................25
7.2 PLCHandlers.DLL Error Codes..........................................................................................................26
8 Appendix........................................................................................................................................................27
8.1 References.........................................................................................................................................27
8.2 Sales & Service..................................................................................................................................28
8.2.1 Main Factory in Malente...................................................................................................................28
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8.2.2 Sales Germany.................................................................................................................................28
8.2.3 Customer Service.............................................................................................................................28
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KUHNKE Automation CoDeSys System Interface
1 Introduction
Communication Strategy Diagram
CoDeSys
programming
system
The CoDeSys system interface (CDSIF = CoDeSys System Interface) consists
of several DLLs enhancing simple data exchange between a modern
programming language (Delphi, Visual Basic, VC++), MS Office (Excel),
SCADA systems, LabVIEW, etc. at one end of the line and unit of the Co-
DeSys Automation Alliance at the other.
This document will mainly focus on products supplied by Kuhnke GmbH /
Malente, Germany.
CDSIF.DLL encapsulates the C++ classes of the PLCHandler.DLL in simpler
functions.
Symbol file
for PLC 1
and/or PLC 2
projects
VB application Delphi
visualisation
CDSIF.DLL
PLCHandler
TCP/IP or local
Gateway
TCP/IP, serial, DPRAM, etc.
PLC 1 PLC 2
CDSIF.INI,
communication
method
descriptions
simultaneous
connections with
several controllers
possible
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1.1 Functions
The following set of services is currently supported:
• Connecting / disconnecting.
• Reading (browsing) of all variables available in the controller.
• Synchronous read.
• Synchronous write.
• Synchronous read of structures.
• Synchronous write of non-numerical variables.
The following services still need to be implemented:
• Cyclic read.
• Generation of list of variables for cyclic read.
The following communication methods are currently supported:
• WIN-XP, ARTI, serial with a 690PLC+ via com1 and com2.
• WIN-XP, GATEWAY, serial with a 690PLC+ via com1 and com2.
• WIN-XP, GATEWAY, shared memory with a 645-PCI.
• WIN-XP, GATEWAY, Ventura-CAN.
• WIN-XP, GATEWAY, shared memory with Ventura+.
• WIN-XP, TCPIP.
• WIN-XP, SP RTE soft PLC
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2 PLCHandler
2.1 Source
2.2 Possibilities of Communication
PLCHandler programmer's manual, 3S GmbH V1.2 8 Feb 2005
PLCHandler and controller can communicate via the following channels (interfaces):
Simulation:
Symbol definitions of the controller are retrieved directly from the SDB file.
Afterwards, read and write operations are supported on all variables as if the
controller was directly connected.
ARTI
The ARTI interface is available for various platforms: Windows XP/NT/CE,
VxWorks, Linux. However, TCP/IP and serial are the only communication
methods supported.
GATEWAY:
The Gateway is constrained to the Windows platforms, Windows
95/98/NT/2000/XP. It supports a broader range of communication methods,
though (TCP/IP, serial, shared memory, CANopen, ...).
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3 CDSIF.INI
3.1 Header
CDSIF.INI defines and sets up all communication methods.
It contains the general and specific parameter settings for a communication
method.
[Server] Section containing optional OPC server preferences.
PLCs= Number of possible connections
PLC0=PLC_ID0 Name of first connection
PLC0=PLC_ID1 Name of second connection, etc.
3.2 General Parameters for All Types of Connection
[PLC0:PLC_ID0] or
[PLC1:PLC_ID1]
Section setting up the specified connection.
active= 0: connection dead; 1: connection alive
interfacetype= SIMULATION, ARTI or GATEWAY
gateway=local
gateway=TCP/IP
gatewayaddress=xxx.xxx.xxx.xxx
gatewayaddress=localhost
Local connection on a PC.
Remote connection with a PC.
IP address of remote PC.
TCP/IP link to local PC.
gatewayport=1210 One of the communication parameters retrieved from the
CoDeSys setup.
project=name.pro Name of project that the connection belongs to. => symbol
file
timeout=500 Longest time (in ms) it may take to respond to a data packet
from the controller until an error will be assumed.
tries=10 Number of transfer attempts if a data packet fails to be received.
waittime=20 Longest time (in s) the PLCHandler will try to connect. When
the time is out the routine will return and provoke an error
message.
reconnecttime=2 Interval (in s) at which the Reconnect-Thread() retries to connect.
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3.3 Specific Parameters by Type of Connection
3.3.1 Serial Connection
device=Serial (RS232)
instance=Serial comX com1, com2, etc.
parameters=5
parameter0=Port
value0=COMX
parameter1=Baud rate
value1=19200
parameter2=Parity
value2=No
parameter3=Stop bits
value3=1
parameter4=Motorola byteorder
value4=No
3.3.2 CAN Connection
device=CANopen DSP302
instance=SJA1000
parameters=5
parameter0=NodeID
value0=1
parameter1=Node Send Offset
value1=1536
parameter2=Node Recv Offset
value2=1408
parameter3=CAN bus baud rate
value3=125
parameter4=CAN card driver
value4=SJAdirect
Connection details
com1, com2, etc.
38400 etc.
Connection details
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3.3.3 DPRAM Interfacing with a Slot PLC
device=Kuhnke DPRam 645-ISA
instance=DPRAM
parameters=0 No connection details
3.3.4 Shared Memory with Soft PLC SP RTE
device=Shared memory (Kernel)
instance=SHMEM
parameters=0 No connection details
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4 Symbol Configuration
Before the symbols of a project can be accessed via CDSIF, the CoDeSys
programming system must first generate a symbol file ("project".SDB).
The symbol file is a container for so-called items. An item (data object)
stands for exactly one variable of the control program. Use the items to access
the variable values stored by the controller.
All symbol files are stored in folder %Windows%\Gateway Files where the
gateway will look for them when it starts connecting.
The load generated by reading and writing the variable value does of course
depend on how many items are 'active', i.e. how many items need to be updated
when values are refreshed.
To optimise the time required for cyclic read operations, separate items
should be bundled into structures or arrays which are read in a single cycle.
To make CoDeSys generate a list of variables:
• Run CoDeSys and choose 'Project', ’Options', ’Symbol Configuration’
from the menu and tick option 'Generate symbol entries'.
• Click on ’Configure symbol file’.
All options of the next dialog 'Set object attributes' are selected.
• Remove the tick next to 'Output object variables'.
• Select any variables as appropriate, i.e. module variables, entire modules,
or global variables.
• Tick the box next to 'Output object variables'.
• Click on 'OK' to quit the dialog.
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Enabling option 'Output object variables' is a prerequisite for having the following
options available:
• Output collective entries:
Generates entries allowing structures and arrays of the object to accessing
the whole set of variables.
• Output structure components:
Generates a separate entry for every variable component of the structures
of the object.
• Output field components:
Generates a separate entry for every variable component of the arrays
of the object.
• Write access:
Allows variables of the object to be modified.
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5 Installing the CDSIF System
All files of the CoDeSys System Interface, including the Registry entries and
this documentation, are installed by the installer:
Setup_CDSIF_Ventura.exe
Following installation and after rebooting the computer, the data exchange
functions are available.
Open CDSIF.INI into a text editor to adapt the communication parameters as
appropriate.
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5.1 Installing Add-ons
Before the DPRAM can be used for communication with a slot PLC you must
first install the correct driver.
The installer to use depends on the version of the hardware you have (2k =
old hardware or 8k = up-to-date hardware):
or
SetupDPRamISA2k.exe
SetupDPRamISA8k.exe
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6 CDSIF System Functions
6.1 General
6.1.1 Version Info
The convention to call the parameters of any function is set to stdcall, i.e.
parameters are transferred from left to right, and the called function disposes
of the stack.
function CDSIF_GetVersion(void)
: Unsigned Long;
Returns the version number of CDSIF.DLL as a 3-group value packed into a
32-bit value.
e.g. 010402.
6.2 Connecting with/Disconnecting from PLCHandler and Status
6.2.1 Connect
6.2.2 Disconnect
function CDSIF_Connect(pDir : PChar; iID : Integer)
: Integer;
Runs the PLCHandler using the settings found in CDSIF.INI.
Input parameters:
Parameter Function
pDIR Optional entry specifying the drive and path where
the PLCHandler is to look for CDSIF.INI. Example:
'C:\CDS', '' or ‘’ or nil.
If nothing is entered the default WINDOWS folder will
be searched.
iID Identifies the communication channel. The figure
specifies a section of CDSIF.INI where the system
will go to get the communication parameters.
Output parameters: -
Values returned:
Value Function
0-16 � Error code, see list of errors
-2 PLCHandler.DLL loaded already.
-3 CDSIF.INI not found.
-6 Wrong settings in CDSF.INI.
PLCHandler function: "PLCHandlerInitByFile".
-8 Wrong value (> 16) in iID.
-10 to
-50
Error running a function from PLCHandler.DLL.
DLL stopped and removed from RAM.
function CDSIF_Disconnect(iID : Integer)
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6.2.3 PLCHandler Status
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
Output parameters: -
Values returned:
Value Function
0 O.K. Disconnected successfully, communication channel closed.
-1 Disconnected already.
The status of the PLCHandler can be checked at any time. It indicates the
status of the connection to the PLC.
function CDSIF_GetState(iID : Integer)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
Output parameters: -
Values returned:
Va- Define / Description
lue
-2 STATE_PLCHANDLER
PLCHandler not started
-1 STATE_TERMINATE
PLCHandler unloading (destructor)
0 STATE_PLC_NOT_CONNECTED
Controller not connected (initial state)
1 STATE_PLC_CONNECTED
Controller properly connected
2 STATE_NO_SYMBOLS
Controller connected but symbol file not loaded yet
3 STATE_SYMBOLS_LOADED
Controller connected and symbol file loaded
4 STATE_RUNNING
Controller connected, symbol file loaded, all symbols verified. The
PLCHandler object can now be worked with correctly.
5 STATE_DISCONNECT
Disconnecting
6 STATE_NO_CONFIGURATION
Valid configuration not available
7 STATE_PLC_NOT_CONNECTED_SYMBOLS_LOADED
Symbols available for offline use
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6.3 Synchronous Read
6.3.1 Synchronous Read of Numerical Variables
6.3.2 Reading a Byte
6.3.3 Reading a Word
Several functions are provided for the synchronous reading of numerical variables.
The type of variable to be read (byte, word or long) decides which
function is actually run.
function CDSIF_ReadSyncVarByte(iID : Integer;
pVarName : PChar;
var bVal : Byte)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
Output parameters:
Parameter Function
var bVal Variable value (byte)
Values returned:
Value Function
0-16 � Error code, see list of errors
function CDSIF_ReadSyncVarWord(iID : Integer;
pVarName : PChar;
var wVal : Word)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
Output parameters:
Parameter Function
var wVal Variable value (word)
Values returned:
Value Function
0-16 � Error code, see list of errors
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6.3.4 Reading a Long Word
function CDSIF_ReadSyncVarLong(iID : Integer;
pVarName : PChar;
var lVal : LongWord)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
Output parameters:
Parameter Function
var lVal Variable value (long word)
Values returned:
Value Function
0-16 � Error code, see list of errors
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6.4 Synchronous Read of Arrays and Structures
6.4.1 Synchronous Reading of an Array
Use this function to read arrays of byte, word or long variables.
The max. number of elements in an array is 1024 (byte, word or long)!
To be able to read the entire array, enter the name of the array as the name
of the variable, leaving out the index i.e. exactly as it was declared in CoDe-
Sys.
To read a single element, enter the name of the array together with its index.
You cannot read subsets of elements within an array.
function CDSIF_ReadSyncArray(iID : Integer;
pVarName : PChar;
pVal : PChar;
ulLen : LongWord)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
pVal Identifies the array to contain the read data.
ulLen Identifies the size of the array in byte, not the number
of elements.
This parameter should be specified as sizeof(Array).
Output parameters:
Values returned:
-
Value Function
0-16 � Error code, see list of errors
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6.4.2 Synchronous Reading of a String
function CDSIF_ReadSyncString(iID : Integer;
pVarName : PChar;
pVal : PChar)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Identifies the name of the string to be read.
Output parameters:
Parameter Function
pVal Identifies the string to contain the read data.
Values returned:
Value Function
0-16 � Error code, see list of errors
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6.5 Synchronous Write
6.5.1 Synchronous Write of Numerical Variables
6.5.2 Synchronous Writing of a Byte
Several functions are provided for the synchronous writing of numerical variables.
The type of variable (byte, word or long) decides which function is actually
run.
function CDSIF_WriteSyncVarByte(iID : Integer;
pVarName : PChar;
bVal : Byte)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
bVal Variable value (byte)
Output parameters:
Values returned:
-
Value Function
0-16 � Error code, see list of errors
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6.5.3 Synchronous Writing of a Word
function CDSIF_WriteSyncVarWord(iID : Integer;
pVarName : PChar;
wVal : Word)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
wVal Variable value (word)
Output parameters:
Values returned:
-
Value Function
0-16 � Error code, see list of errors
6.5.4 Synchronous Writing of a Long Word
function CDSIF_WriteSyncVarLong(iID : Integer;
pVarName : PChar;
lVal : LongWord)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
lVal Variable value (long word)
Output parameters:
Values returned:
-
Value Function
0-16 � Error code, see list of errors
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6.5.5 Synchronous Write of Arrays and Structures
Use this function to write arrays of byte, word or long variables.
The max. number of elements in an array is 1024 (byte, word or long)!
To be able to write the entire array, enter the name of the array as the name
of the variable, leaving out the index, i.e. exactly as it was declared in Co-
DeSys.
To write a single element, enter the name of the array together with its index.
You cannot write subsets of elements within an array.
function CDSIF_WriteSyncArray(iID : Integer;
pVarName : PChar;
pVal : PChar;
ulLen : LongWord)
: Integer;
Input parameters:
Parameter Function
iID Identifies the communication channel.
pVarName Specifies the name of the variable.
pVal Identifies the array that is to deliver the data.
ulLen Identifies the size of the array in byte, not the number
of elements.
This parameter should be specified as sizeof(Array).
Output parameters:
Values returned:
-
Value Function
0-16 � Error code, see list of errors
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6.6 Browsing Variables
6.6.1 Getting the Number of Variables
function CDSIF_GetNumberOfSymbols(iID : Integer; var ul-
Symbols : LongWord)
: Integer;
Returns the number of variables that are available.
Input parameters:
Parameter Function
iID Identifies the communication channel.
Output parameters:
Parameter Function
ulSymbols Contains the number of variables.
Values returned:
Value Function
-1 Wrong index.
0-16 � Error code, see list of errors
6.6.2 Reading the Names of Variables
function CDSIF_GetSymbol(iID : Integer; ulIndex : Long-
Word; pSymbol : PChar)
: Integer;
Returns the name of the variable specified by the index.
Input parameters:
Parameter Function
iID Identifies the communication channel.
ulIndex Index of the variable.
Output parameters:
Parameter Function
pSymbols Contains the number of variables.
Values returned:
Value Function
-1 Wrong index.
0-16 � Error code, see list of errors
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7 Error Codes
7.1 CDSIF.DLL Error Codes
There are two different types of error codes, i.e. those generated by the
PLCHandler and those generated by CDSIF.
Value Define / Description
0 RESULT_CDSIF_OK
Job successfully done
-1 RESULT_FAILED
Action not successful.
Use GetLastError or GetState() to obtain more details about the
error.
-2 RESULT_CDSIF_PLCHANDLER
PLCHandler not started
-3 Result of 'Connect' see
Connecting
-5 RESULT_CDSIF_TIMEOUT5
Timeout via PLCHandlerGetState
-6 Result of 'Connect' see Connecting
-7 RESULT_CDSIF_TIMEOUT7
Timeout via PLCHandlerSyncRead/Write
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7.2 PLCHandlers.DLL Error Codes
Value Define / Description
-1 RESULT_FAILED
Action not successful.
Use GetLastError() or GetState() to obtain more details about
the error.
0 RESULT_OK
Job successfully done
1 RESULT_PLC_NOT_CONNECTED
Controller not connected
2 RESULT_PLC_LOGIN_FAILED
Failure logging into the controller
3 RESULT_PLC_NO_CYCLIC_LIST_DEFINED
No list registered for cyclic operations
4 RESULT_PLCHANDLER_INACTIVE
PLCHandler disabled
5 RESULT_LOADING_SYMBOLS_FAILED
Failure loading the symbols
6 RESULT_ITF_NOT_SUPPORTED
Invalid interface or interface not supported
7 RESULT_COMM_FATAL
Communication error encountered while taking the action
8 RESULT_NO_CONFIGURATION
Wrong PLCHandler configuration or configuration not ok
9 RESULT_INVALID_PARAMETER
Invalid parameters
10 RESULT_ITF_FAILED
Communication interface not or not correctly installed (e.g.
gateway DLLs not available)
11 RESULT_NOT_SUPPORTED
Method not supported or implemented yet
12 RESULT_EXCEPTION
Exception encountered while taking the action
13 RESULT_TIMEOUT
Time-out time exceeded
14 RESULT_STILL_CONNECTED
Controller already connected (and Connect() function is run
again)
15 RESULT_RECONNECTTHREAD_STILL_ACTIVE
Reconnect Thread already enabled
16 RESULT_PLC_NOT_CONNECTED_SYMBOLS_LOADED
Symbols available for offline use
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8 Appendix
8.1 References
Title / Subject Number Source
Ventura IPC 300 / 700
PC-based Controller
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8.2 Sales & Service
8.2.1 Main Factory in Malente
8.2.2 Sales Germany
8.2.3 Customer Service
Please visit our Internet site to find a comprehensive overview of our sales
and service network including all the relevant addresses. You are, of course,
always welcome to contact our staff at the main factory in Malente or at
sales headquarters in Neuhausen:
Kuhnke Automation GmbH & Co. KG
Lütjenburger Straße 101
D-23714 Malente
Phone +49 (0)4523 402-0
Fax +49 (0)4523 402-247
Email sales@kuhnke.de
Internet www.kuhnke.de
Kuhnke Automation GmbH & Co. KG
Stuttgart Branch Office
Strohgäustraße 3
D-73765 Neuhausen
Phone +49 (0)7158 9074-0
Fax +49 (0)7158 9074-80
Email sales@kuhnke.de
Internet www.kuhnke.de
Kuhnke Automation GmbH & Co. KG
Lütjenburger Str. 101
D-23714 Malente
Phone +49 (0)4523 402-200
Fax +49 (0)4523 402-201
Email service@kuhnke.de
Internet www.kuhnke.com
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