Post by risele on Modbus connection via Qronox PCD3 M6893 ^{CODESYS Forge talk (Post)}
First, if you don't need to change conversion rules in runtime, take a look at "Unit conversion" module (Application -> add object -> UnitConversion). You can specify there biderectional conversion with different units, limits and so on. Second, since MODBUS don't have "real" types but only general 16-bit registers and Real is 32-bit, generally you need a byte-was conversion Real <> two Words. Note, that depending on the devices on both sides, there are two options: Real-> Word1, Word2 or Real-> Word2, Word1, where Word1 is minor register in Modbus register pair and Word2 is major. You can use simple union: TYPE u_Real : UNION rVal:REAL; wVal:ARRAY[0..1] OF WORD; dwVAL:DWORD; //same as previous, may be easier to specify the MB register END_UNION END_TYPE and convert it as following: VAR myUnion:u_Real; rValue_TO_SEND:REAL; rValue_TO_GET:REAL; END_VAR myUnion.rVal:=rValue_TO_SEND; rValue_TO_GET:=myUnion.rVal; Note, that WORD-order should be properly set in MODBUS registers, otherwise you will get strange values. This tool is helpful: https://www.scadacore.com/tools/programming-calculators/online-hex-converter/ Alternative, you can use functions as REAL_TO_DW and DW_TO_REAL from OSCAT_BASIC, for example.
Last updated: 2026-02-19

Post by eschwellinger on Unable to deploy "Control for Linux SL 4.18.0.0" ^{CODESYS Forge talk (Post)}
can you please check this: https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_toubleshooting_deploytool2.html#UUID-b83dc01e-8cff-c574-7efe-8615b95a51ed_section-idm234790234401598
Last updated: 2026-02-19

Post by timvh on Unit testing support / libraries for EcoStruxure Machine Expert (CODESYS) ^{CODESYS Forge talk (Post)}
If the Professsional Developer Edition (which includes the Test Manager) is not supported by Schneider, then an option is to use the Open Source Unit test framework. See: https://forge.codesys.com/lib/counit/home/Home/
Last updated: 2026-02-20

Post by akneer on HMI über Webbrowser ^{CODESYS Forge talk (Post)}
Beispiel: IF bShutdownPC THEN bShutdownPC := FALSE; // LINUX SysProcess_Implementation.SysProcessExecuteCommand( pszComand:='shutdown -h 0', pResult := ADR(udiError)); // WINDOWS SysProcess_Implementation.SysProcessExecuteCommand( pszComand:='shutdown.exe -s -t 05', pResult := ADR(udiError)); END_IF
Last updated: 2026-03-04

Post by alexgooi on Codesys KNX implementation ^{CODESYS Forge talk (Post)}
Dear Forum, For anyone interested we have solved this problem. Before we were using a KNX TP/IP interface, now we are using a KNX TP/IP router, and it works like a charm now.
Last updated: 2026-03-04

Post by oemcba on Editor FIND highlight color ^{CODESYS Forge talk (Post)}
Today is 2026, and we still have the same issue since 2017, anyone have the answer? i'm using V3.5 SP18 P4+ from festo, thanks in advance... @rudolsto @r.evbatyrov @cole @mahmutonx @root @codesys-com
Last updated: 2026-03-06

Post by fpawlak on How to register own component - CMAddComponent() or CMAddComponent2() ^{CODESYS Forge talk (Post)}
Hi, so really oneone has no idea which way is correct one? Or maybe both are okey if they work for me?
Last updated: 2026-03-13

Post by gordonkeller360 on RS232 Communication in CODESYS Control RTE V3 ^{CODESYS Forge talk (Post)}
Hi -- Did you have any luck porting this over to RTE? I have a similar situation, where I am using CAA SerialCom and it works fine with Control Win, but I can't open the port when using in RTE. Any advice helps. Thanks!
Last updated: 2026-03-14

Post by pernockham on Gateway in China - "Gateway not connected" ^{CODESYS Forge talk (Post)}
Finally sorted (unit in China). The problem was related to dns-setting of the gateway/host. Connection (also inside china) tested/works.
Last updated: 2026-03-18

Post by reinier-geers on CODESYS crashes when adding standard OPC UA Information Model to Communication Manager ^{CODESYS Forge talk (Post)}
I only experiance a lot of problems with Version 20 and 21. Version 20 crashes at a online change Version 21 - 5 identical programms in one project. The frist runs. The thirt Crashes. NOt even a screen
Last updated: 2026-03-19

Post by thomasrek31 on Textfield display problem ^{CODESYS Forge talk (Post)}
Hello, have you found a solution? It seems I have the same problem as you. I can't remove the overlay, otherwise certain functions stop working.
Last updated: 2026-03-23

Post by thomasrek31 on Textfield display problem ^{CODESYS Forge talk (Post)}
Hello, have you found a solution? It seems I have the same problem as you. I can't remove the overlay, otherwise certain functions stop working
Last updated: 2026-03-23

Post by struland on Sysfile Konfiguration ^{CODESYS Forge talk (Post)}
Bei mir half: [SysFile] IecFilePath=/mnt/sdcard Allerdings ist es kein Raspi. Den Ordner, der gelesen werden soll mal auf korrekte Zugriffsrechte prüfen. Im Falle das SELinux aktiv ist mit ls -lZ, ansonsten ls -al
Last updated: 2026-04-13

Post by struland on Sysfile Konfiguration ^{CODESYS Forge talk (Post)}
Bei mir half: [SysFile] IecFilePath=/mnt/sdcard Allerdings ist es kein Raspi. Den Ordner, der gelesen werden soll mal auf korrekte Zugriffsrechte prüfen. Im Falle das SELinux aktiv ist mit ls -lZ, ansonsten ls -al
Last updated: 2026-04-13

Post by nulltrace on How change Unity-ID in TCP Modbus Slave ^{CODESYS Forge talk (Post)}
Hey, I also waiting for feedback from Mr. Schwellinger @eschwellinger, please send me an answer, i would appreciate it. The clue is, i know the solution, but have to check if it's allowed to share.
Last updated: 2026-04-14

Post by reinier-geers on Resize and position Numpad/Keypad ^{CODESYS Forge talk (Post)}
HI, I download the scale dialog. But cant find were i can Set the size of the dialogs. only the position. I want the diolog bigger
Last updated: 2026-04-15

Post by husarz17 on How change Unity-ID in TCP Modbus Slave ^{CODESYS Forge talk (Post)}
Good to know there's a solution to this problem. I hope you'll be able to share it with me. I can't wait to hear about it.
Last updated: 2026-04-20

Post by skiper on Best practice to reduce CPU load ^{CODESYS Forge talk (Post)}
Hi ! I can't say exactly the best practice you can use to reduce your cpu load but you can use the codesys exemple. https://www.codesys.com/products/visualization/#c3876 Go to the midle of the page and you have a link to download an exemple.
Last updated: 2026-04-21

Post by charleskirkland on Connect to Azure IoT Hub ^{CODESYS Forge talk (Post)}
It sounds like your TLS setup is basically correct, since the handshake works via OpenSSL, so the issue is likely on the CODESYS side rather than the certificates themselves. From what I’ve seen with the Azure IoT Hub Client SL library, you should double-check that the SAS token is actually being generated and passed correctly to the function blocks (especially wsDeviceSaS) and that the MQTT/HTTPS FB is really triggered cyclically-otherwise the controller won’t initiate the connection at all. Also, make sure DNS, time (NTP), and full certificate chain trust are properly configured on the controller, since IoT Hub authentication depends on them even when using SAS tokens. Another thing worth checking is the library/runtime version-there are reports that certain versions changed behavior and caused connection issues. I’d recommend starting with the official demo project (AzureMQTTDemo) and comparing it step by step with your setup to see what’s missing or not triggered. Speed Stars
Last updated: 5 days ago

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