Post by evanclegg on Digital Clock
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To display the current time, you’ll need to retrieve it from the system clock. In CODESYS, you can use the built-in function SysTime to get the current system time. Here’s an example of how you can use it: VAR dtCurrentTime: DATE_AND_TIME; sTime: STRING(8); END_VAR dtCurrentTime := SysTime(); sTime := TIME_TO_STRING(dtCurrentTime.t); The sTime variable now contains the current time in the format “HH:MM:SSuno online".
Last updated: 2024-02-28
Post by dom4u on Using PEAK CAN PCIe card (IPEH-004040) with Codesys Control RTE V3
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The problem is that newer PeakCAN cards are with CAN FD support and SJA1000 compatibility isnt mentioned anymore on website. anyway, is it possibile to add a seperate entry for it in: [CmpSJACanDrv] ? Edwin, can you give us a hint how to format it?
Last updated: 2024-12-16
Post by alexgooi on OPC-UA Boolean format
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Dear Forum, We are currently making the switch from OPC-DA (Codesys server) to OPC-UA (Running on a Codesys controller). We are using Codesys version 3.5 SP 20. Our Scada system is expecting Boolean's to be represented as a 0/1 (True Boolean) but the OPC-UA server is representing a boolean as False/True This indeed matches the OPC-UA standard, but is there a way to configure the OPC-UA server's boolean representation? Thank you in advance
Last updated: 2024-08-06
Post by breiter on Frustration-Fueled Feedback on Project File Management and Git Integration
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Hi, supporting a text based storage format is on our roadmap, see https://www.codesys.com/the-system/releases-updates-lifecycle/release-plan-roadmap.html It will be an Add-On feature called "File Based Storage" for the professional developer edition. Structured text POUs will be stored as plain text. Other graphical languages will remain in an xml format. You will be able to switch the storage type for projects. Certain workflows will become easier this way. Nevertheless restrictions will remain because of CODESYS specific storage logic (for example how methods below function blocks are stored as file). So merging using our Git Integration Add-On remains the recommended workflow. A workflow involving Visual Studio Code as the main IDE is not supported. Simply because many topics like library management, task configuration or fieldbus configurators are not available for VS Code. A PLC project is a lot more than just some ST POUs. Best Regards
Last updated: 2024-10-16
Post by tama00 on Datenübertragung mit SSP0 zw. uC und Raspberry Pi mit Codesys Runtime
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Hallo zusammen, ich arbeite derzeit an einem Projekt, bei dem ich einen Microcontroller habe, der Messwerte über die SSP0-Schnittstelle an einen Raspberry Pi senden soll. Diese Daten sollen dann in Codesys für eine Soll/Istwert Vergleich/Regelung verwendet werden, und das Ergebnis soll zurück an den Microcontroller geschickt werden. Meine Frage ist, ob es möglich ist, diese Kommunikation über die SSP0-Schnittstelle (als SPI frame format) zu realisieren, oder ob ich auf eine 'reine' SPI-Schnittstelle des uCs zurückzugreifen muss. Gibt es spezielle Dinge, die ich beachten muss, um diese Datenübertragung erfolgreich in Codesys zu implementieren? Ich wäre sehr dankbar für Ratschläge oder Hinweise, wie ich dieses Vorhaben am besten umsetzen kann. Vielen Dank im Voraus!
Last updated: 2024-01-31
Post by tama00 on Datenübertragung mit SSP0 zw. uC und Raspberry Pi mit Codesys Runtime
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Hallo zusammen, ich arbeite derzeit an einem Projekt, bei dem ich einen Microcontroller habe, der Messwerte über die SSP0-Schnittstelle an einen Raspberry Pi senden soll. Diese Daten sollen dann in Codesys für eine Soll/Istwert Vergleich/Regelung verwendet werden, und das Ergebnis soll zurück an den Microcontroller geschickt werden. Meine Frage ist, ob es möglich ist, diese Kommunikation über die SSP0-Schnittstelle (als SPI frame format) zu realisieren, oder ob ich auf eine 'reine' SPI-Schnittstelle des uCs zurückzugreifen muss. Gibt es spezielle Dinge, die ich beachten muss, um diese Datenübertragung erfolgreich in Codesys zu implementieren? Ich wäre sehr dankbar für Ratschläge oder Hinweise, wie ich dieses Vorhaben am besten umsetzen kann. Vielen Dank im Voraus!
Last updated: 2024-01-31
Post by tama00 on Datenübertragung mit SSP0 zw. uC und Raspberry Pi mit Codesys Runtime
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Hallo zusammen, ich arbeite derzeit an einem Projekt, bei dem ich einen Microcontroller habe, der Messwerte über die SSP0-Schnittstelle an einen Raspberry Pi senden soll. Diese Daten sollen dann in Codesys für eine Soll/Istwert Vergleich/Regelung verwendet werden, und das Ergebnis soll zurück an den Microcontroller geschickt werden. Meine Frage ist, ob es möglich ist, diese Kommunikation über die SSP0-Schnittstelle (als SPI frame format) zu realisieren, oder ob ich auf eine 'reine' SPI-Schnittstelle des uCs zurückzugreifen muss. Gibt es spezielle Dinge, die ich beachten muss, um diese Datenübertragung erfolgreich in Codesys zu implementieren? Ich wäre sehr dankbar für Ratschläge oder Hinweise, wie ich dieses Vorhaben am besten umsetzen kann. Vielen Dank im Voraus!
Last updated: 2024-01-31
Post by mondinmr on Frustration-Fueled Feedback on Project File Management and Git Integration
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Good day, I’m writing this message out of frustration regarding the current way project files are saved as encrypted XML and single-file format in CODESYS. I find this approach to be quite tedious for several reasons: Limited Access to Structured Text: Not being able to access Structured Text (ST) externally makes it impossible to work with alternative editors like VSCode. Tools like VSCode are incredibly responsive and feature advanced systems such as GitHub Copilot, which would be a real game-changer when working with ST IEC. While CODESYS works well for small code snippets or debugging, when the codebase grows, switching to VSCode to boost productivity becomes essential, and copy-pasting between environments is a cumbersome workaround. Poor Integration with Git: This file format also makes it very difficult to integrate effectively with Git. I have tested the internal demo, but for advanced merges, it is unusable. Without properly formatted plain text, it’s impossible to leverage the vast ecosystem of external tools around Git that allow smooth merges in heterogeneous teams. File Corruption on Network Drives: I often work from multiple locations with shared network drives. When the development environment saves a file and something goes wrong midway (which can occasionally happen when using VPNs and network drives), the entire project becomes irrecoverable. There’s no way to cancel the save process, and the development environment freezes. This has happened to me at least four times over the past two weeks, and one of those incidents cost me an entire day of work. All of this is particularly disappointing because I truly believe that the libraries, runtime, and overall work done by CODESYS are exceptional. I find it fantastic that there is a platform allowing development of PLCs and control systems using OOP, which is a huge advantage in modern control engineering. I apologize for the rant, but this issue has been extremely frustrating. Best regards.
Last updated: 2024-10-15
Post by solidlogicguy on Little endian to Float from Modbus RTU
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Hello, I got a device from which I require to read values from I am using a WAGO PLC 750-8212 and I am communicating through Modbus Master FUNCTION BLOCK from library WagoAppPLCModbus in Codesys 3.5 to this device. I already receive data from the device that is a CVM to monitor voltage from a fuel cell. The technical support of the company that makes these devices says that the data is sent in little endian form. And I want to convert it to a float value. The tech support sent me the next instructions of how to do it but I am new using codesys, so any advice or help I will really appreciate so much. Message from tech support: The process is complicated, better to do it with already implemented library in the language/program you use. Basically the process should be next: To convert the two Modbus registers containing parts of a 32-bit float in little-endian byte order to a floating-point number using mathematical operations, you first need to combine the two 16-bit integers (assuming reg1 is the lower word and reg2 is the higher word) and then interpret the result according to the IEEE 754 standard. Given: - Register 192 (reg1) = 4096 - Register 193 (reg2) = 14884 Step 1: Combine the two registers. Since we are dealing with little-endian byte order, reg2 is the high word, and reg1 is the low word: combined = reg2 * 2^16 + reg1 combined = 14884 * 65536 + 4096 combined = 975175680 + 4096 combined = 975179776 Step 2: Convert the combined value to binary: combined_binary = '1110101101011100000000000000000' Step 3: Split the binary into IEEE 754 components: Sign bit (1 bit): 0 Exponent (8 bits): 11101011 Mantissa (23 bits): 01011100000000000000000 Step 4: Convert the binary exponent to decimal and subtract the bias (127 for 32-bit floats): exponent = int('11101011', 2) - 127 exponent = 235 - 127 exponent = 108 Step 5: Calculate the mantissa as a fraction: The mantissa in IEEE 754 format is the fractional part after the leading 1 (which is implicit). Therefore, we need to convert the binary mantissa to decimal and add the implicit leading 1: mantissa_fractional = 1 + int('01011100000000000000000', 2) / 2^23 mantissa_fractional = 1 + 18688 / 8388608 mantissa_fractional = 1 + 0.002227783203125 mantissa_fractional ≈ 1.002227783203125 Step 6: Combine the sign, exponent, and mantissa to get the float value: float_value = (-1)^0 * mantissa_fractional * 2^exponent float_value = 1 * 1.002227783203125 * 2^108 Because the exponent is quite large, the resulting float value is a very large number.
Last updated: 2023-12-15
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