siemens

问题 I would like to create an application for industrial automation to do the following functionalities: Read values from PLC, SCADA, and DCA Process those values and notify failures to Supervisor and Technician I am new to the Industrial Automation industry and IoT, and I knew that we have OPC UA in place to rescue. I came across many websites and youtube videos to understand OPC UA and its predecessors (OPC DA, OPC A&E, OPC HDA). And I have installed matrikon OPC server and explorer (client) to

问题 I need to create something to read data from a PLC and write it to a SQL database. I mostly work with Siemens (and Sigmatek) and I think OPC-UA would be a good solution. My problem is that I don't know what the "right" way would be to start with this. With a PLC you sometimes come in contact with C or C++ (I always forget which one). So I think that would be a good starting point, but a good connection to an SQL-database would be very handy. That's where things gets blurry for me. In the past

问题 I need to create something to read data from a PLC and write it to a SQL database. I mostly work with Siemens (and Sigmatek) and I think OPC-UA would be a good solution. My problem is that I don't know what the "right" way would be to start with this. With a PLC you sometimes come in contact with C or C++ (I always forget which one). So I think that would be a good starting point, but a good connection to an SQL-database would be very handy. That's where things gets blurry for me. In the past

问题 I need to create something to read data from a PLC and write it to a SQL database. I mostly work with Siemens (and Sigmatek) and I think OPC-UA would be a good solution. My problem is that I don't know what the "right" way would be to start with this. With a PLC you sometimes come in contact with C or C++ (I always forget which one). So I think that would be a good starting point, but a good connection to an SQL-database would be very handy. That's where things gets blurry for me. In the past

问题 The problem and what I suspect goes wrong: I am trying to read a custom data type node from a Siemens Simatic S7-1500 and decoding fails with: Error running client example: max string length exceeded (length=1819042152, max=2097152) org.eclipse.milo.opcua.stack.core.UaSerializationException: max string length exceeded (length=1819042152, max=2097152) What I did so far: First of all, I've read and tried out the ReadWriteCustomDataTypeNodeExample from the client examples module. I've basically

问题 The problem and what I suspect goes wrong: I am trying to read a custom data type node from a Siemens Simatic S7-1500 and decoding fails with: Error running client example: max string length exceeded (length=1819042152, max=2097152) org.eclipse.milo.opcua.stack.core.UaSerializationException: max string length exceeded (length=1819042152, max=2097152) What I did so far: First of all, I've read and tried out the ReadWriteCustomDataTypeNodeExample from the client examples module. I've basically

问题 The problem and what I suspect goes wrong: I am trying to read a custom data type node from a Siemens Simatic S7-1500 and decoding fails with: Error running client example: max string length exceeded (length=1819042152, max=2097152) org.eclipse.milo.opcua.stack.core.UaSerializationException: max string length exceeded (length=1819042152, max=2097152) What I did so far: First of all, I've read and tried out the ReadWriteCustomDataTypeNodeExample from the client examples module. I've basically

问题 I'm trying to write something to my Siemens PLC with a C++/CLI application. Reading is ok (except the first time it reads it gives odd values). But writing is doing something completely different then what I want. below you can find the code: private: void WriteSiemensDB() { byte* buffer; if (ConnectToSiemensPLC()) //Check if you are connected to PLC { String^ msg; int DBNumber = 2; bool NDR; //Getting the values 1 time so buffer has a value buffer = sPLC->ReadDB(DBNumber); //give variables a

问题 I am running a process on a S7-1200 plc and I need it to send a start signal to my python script, after the script is done running it needs to send something back to the plc to initiate the next phase. Oh, and it has to be done in ladder. Is there a quick and dirty way to send things over profibus or am I better off using just a RS232 thing? 回答1: I would go with SNAP7 and python-snap7 libraries. Example on how to install it on a Raspberry pi found in this blog: http://simplyautomationized

问题 I've been working with HTML and javascript to create graphical web pages to display data from my Siemens S7 1500 PLC. I've been using a $.getJSON command to successfully read values from the PLC when the web page that requests the information is served up by the PLC web server and in the same directory as the file with the JSON structure and all of the desired values. I have a PC connected to my PLC via ethernet and wish to run a web page locally on the PC and read the values served up by a