OPC Driver User`s Manual
Contents
1. variable_list list of the variable names in the asix system delimited with commas The second group of options is placed in the section with the same name as the channel name to which they apply see Table 2 Table 2 Options Placed in the Section with the Same Name as the Channel Name for the OPC Driver Range LogOnDataChangeStat LogOnDataChangelteml nfo LogAddItemSucceeded LogWriteSucceeded TracedNames lt list of the variable names in the asix system delimited with commas gt The information on the number of variables sent each time by the OPC server during the refreshing and processing of the data sent by the driver is placed in the log The names of variables sent each time by the OPC server during the refreshing are placed in the log The information on successful end of the operation of writing to the OPC server is placed in the log The information on successful end of the operation of writing to the OPC server is placed in the log For each variable which name is on the list the information on its value quality and stamp will be written to the log during the variable processing All the options concerning the communication test may be changed during the asix system operation After the modification and writing the application initialization file on the disc August 2005 ASKOM Gliwice asix4 OPC Driver the new option values will be retrieved form the log by the2. 2005 11
3. OPC driver and will begin to have an effect on the range of information to be written to the log 1 8 Channel Definition Updating for the OPC 1 0 Driver The channel definition has the following form for the previous OPC driver version lt Channel_name gt OPC lt OPC server Progi gt To convert the definition to the current obligatory form one should change the text OPC with the comma into UniDriver OPC ProgId EXAMPLE Matrikon OPC Matrikon OPC Simulation The current form Matrikon UniDriver OPC ProgId Matrikon OPC Simulation ASKOM Gliwice August 2005 7 OPC Driver asix4 8 August 2005 ASKOM Gliwice asix4 List of Tables 2 List of Tables Table 1 OPC Driver Options Used in the Channel Declaration sasssesenan nenen aneennnannan anana nnena ananem nane 4 Table 2 Options Placed in the Section with the Same Name as the Channel Name for the OPC Driver 6 ASKOM Gliwice August 2005 9 List of Tables asix4 10 August 2005 ASKOM Gliwice asix4 Table of Contents 1 OPC DRIVER 3 1 1 DRIVER USE 3 12 CHANGES IN OPC DRIVER VERSION 2 0 3 1 3 DECLARATION OF TRANSMISSION CHANNEL 3 1 4 DEFINING THE PROCESS VARIABLES 4 1 5 TYPE MACHING 4 1 6 MANAGER OF LOGICAL CHANNELS FOR THE OPC DRIVER 5 1 7 COMMUNICATION TESTING 5 1 8 CHANNEL DEFINITION UPDATING FOR THE OPC 1 0 DRIVER 7 D LIST OF TABLES 9 ASKOM Gliwice August
4. scalar values like a Byte 8 bit unsigned number b Word signed or unsigned word 16 bit number c Double Word signed or unsigned double word 32 bit number d Single Precision 32 bit real number 2 single dimension table variables consisting of simple variables see 1 3 text variables Changes in OPC Driver Version 2 0 e Adding the OPC server service compatible with the OPC 2 05 specification e Adding the possibility of specifying the access path for variables in the transmission channel e Adding the possibility of blocking the operation of writing to the OPC server e Driver extension with read write operation of text table variables e Elimination of large OPC server loading reducing considerably its capacity in case when a variable archiving period was too long in relation to their sampling period 1 3 Declaration of Transmission Channel The definition of transmission channel using the OPC driver is as follows lt Channel_name gt UniDriver OPC lt Options gt The basic and the only obligatory OPC driver option is the OPC server identifier given in the following form Progld lt OPC server identifier gt EXAMPLE An examplary declaration of the channel recalling to the OPC server registered uder the Matrikon OPC Simulation identifier Matrikon UniDriver OPC ProglId Matrikon OPC Simulation All the driver options are described in the table below see Table 1 ASKOM Gliwice Au
5. should be declared as the variable address The syntax of the identifier depends on the specific OPC server and is described in its documentation If the identifier contains small letters comma or white space then the identifier the whole one should be put in quotation marks 1 5 Type Maching While initializing the variable in the OPC server the OPC driver sends a requested type of the variable to it This type is defined according to the conversion function that has been assigned to the variable in the asix VariableBase If the variable type requested by the OPC driver differs from the type declared in the OPC variable base then the OPC server usually accepts the requested type and performs the proper conversion during the data transmission If the OPC server is not able to perform the proper conversion then an error is notified at the moment of variable initialization This fact is also signaled in the list of system messages in Control Panel as the message Incorrect variable type The variable the initialization of which finished with an error will have a bad status 4 August 2005 ASKOM Gliwice asix4 OPC Driver If the error connected with the variable type misfit in the asix system and the OPC server occurs then the other analogical conversion function but operating with the variable type handled by the OPC server should be used The variable types used by conversion functions are described in the asix system docu
6. OPC driver 1 7 Communication Testing The OPC driver enters on the message list of Control Panel information on important events like driver loading driver connection to the OPC server variable initialization performance The information on possible errors at the driver initialization and operation stage is also entered on the list Detailed information on errors and diagnostic information is placed in the OPC log file The driver log file is named UniDriver lt current_date gt log and is placed in the asik system directory by default There are two groups of options defining the kind of information written to the log file The first group options are placed in the UniDriver section v LogPath record_track Meaning the log file is placed in the defined directory Default value by default the log file will be created in the asix directory Parameter record_track path to the directory in which the log file will be created ASKOM Gliwice August 2005 5 OPC Driver asix4 lV ShowLogConsole YES NO Meaning if the option has the value YES then the diagnostic window is displayed and all the information being written to the log appears in this window Default value NO lV TracedNames variable_list Meaning for each variable which name is on the list the information on its value quality and stamp will be written to the log during the variable processing Default value lack Parameter
7. User s Manual AS see and get more OPC Driver User s Manual Doc No ENP4045 Version 29 08 2005 User s Manual asix4 ASKOM and asik are registered trademarks of ASKOM Sp ka z 0 0 Gliwice Other brand names trademarks and registered trademarks are the property of their respective holders All rights reserved including the right of reproduction in whole or in part in any form No part of this publication may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or by any information storage and retrieval system without prior written permission from the ASKOM ASKOM sp z o o shall not be liable for any damages arising out of the use of information included in the publication content Copyright 2005 ASKOM Sp z o o Gliwice ASKOM Sp z o o ul J zefa Sowi skiego 13 44 121 Gliwice AS zsa tel 48 0 32 3018100 fax 48 0 32 3018101 http www askom com pl e mail office askom com pl asix4 OPC Driver 1 OPC Driver Ti 1 2 Driver Use The OPC driver is used for data exchange between asix system computers and any industrial PLC or SCADA program that has an access to a data server compatible with the OPC 1 0 or OPC 2 05 specification OPC specification is available at www opcfoundation org The OPC driver handles operations of read write from into a controller of 1 simple variables containing
8. gust 2005 3 OPC Driver asix4 Table 1 OPC Driver Options Used in the Channel Declaration Option Description Default Value Progld lt tekst gt OPC server identifier under which the server is Lack registered in the Windows system ReadOnly Yes No_ Ifthe option has the value Yes then all write No operations to the OPC server are blocked ItemsAlwaysActive The option should have the value Yes with the exception of case when variables are not archived in the asix system and not used in scripts and the number of variables read at the same moment should be minimize because of a limited transmission band OPCVersion 0 1 2 If the option have the value 1 or 2 then communication with the OPC server is realized always according to the OPC specification of the version properly 1 0 or 2 05 If the option have the value 0 then the driver tries to use both versions beginning with 2 05 An examplary declaration of the channel using all options it should be written in the application INI file in one line Matrikon UniDriver OPC ProgiId Matrikon OPC Simulation ReadOnly yes ItemsAlwaysActive yes OPCVersion 2 1 4 Defining the Process Variables Defining the variables in the asix system is described in asix4 User Manual in chapter Asmen Communication Manager see Declaration of Process Variables When defining the variable recalling to an OPC server the variable identifier from the OPC server variable base
9. mentation in chapter ASMEN Communication Manager Conversion Functions the type of variables requested by the OPC server is named type of PLC variable The variable type misfit most often occurs when the conversion functions that operate on unsigned numbers are used It is because some OPC servers don t handle such numbers at all In such case it is impossible to use the following functions TIME CIRCLE1 COUNTER MASK FACTOR FACTOR DW NEGBIT NEGBIT DW NOTHING NOTHING BYTE NOTHING DD NOTHING DW ON OFF SHIFT _ L SHIFT R SLIODER SLIDER1 SLIDER1 FP There are three conversion functions handling any type of values being received from the controller GRADIENT AVERAGE TABLE For these functions the OPC driver always requests from the OPC server sending the variable values in the form of floating point numbers because the floating point number is always these functions output type 1 6 Manager of Logical Channels for the OPC Driver Manager of logical channels enables easy editing the definition of transmission channels using the OPC server through simple setting options in the dialog window specially prepared for the OPC driver The text edition of transmission channels using other drivers than the OPC driver is also possible The manager is placed in the ChannelsManager exe file in the directory of the asix system by default c asix More detailed information you can find in Manager of the logical channels for the
Download Pdf Manuals
Related Search