Post by ahofer on Deploy Control SL kein Zugriff aus der vertuellen Maschine ^{CODESYS Forge talk (Post)}
Hallo, ich arbeiten an einer Technikerschule als Lehrer; dort hatte ich das Problem. Jetzt habe ich die Situation bei mir zuhause ausprobiert; anfangs gab es eine Fehlermeldung; dann habe ich die Firewall ausgeschaltet. Daraufhin ging der Zugriff. Anschließend habe ich die Firewall wieder eingeschaltet und plötzlich ging der Zugriff auch mit Firewall. Ob das jetzt im Netzwerk in der Schule genauso ist kann ich erst morgen testen. Ich melde mich dann wieder. VG Toni
Last updated: 2025-12-08

Post by harryc on Soft Container License issue with ARM64 Linux ^{CODESYS Forge talk (Post)}
hi @eschwellinger Thanks for the hint. This is what I get with "cmu -x" There is no Dongle. I think that I'm trying to install the soft container from CODESYS development system, where I have the licensed installed in the License Repository. The development system gives me the error when I try to install the Soft Container license. # cmu -x - CodeMeter Universal Support Tool. Version 8.20 of 2024-Sep-10 (Build 6539) for Linux/ARMHF 64-Bit Copyright (C) 2007-2024 by WIBU-SYSTEMS AG. All rights reserved. #
Last updated: 2025-12-10

Post by nxbp on About Compatibility ^{CODESYS Forge talk (Post)}
Let's say I have a CODESYS controller (PLC) with a runtime version around 3.5.19. If I use development software version 3.5.21.40 or a later version that will be released in the future for programming, could there be any problems or malfunctions in the controller's program execution or in the execution of the new, updated function blocks from the newer software? I mostly work with servo-based motion applications, so please keep that in mind when answering, and provide a detailed answer so I don't have to email you again about this topic.
Last updated: 2025-12-11

Post by gseidel on Scara3 kinematic robot error ^{CODESYS Forge talk (Post)}
Hi aniket-b, this error has nothing to do with the scara3 kinematics, or robotics, or SoftMotion. It means that the EtherCAT bus is not synchronized. The usual cause is that the realtime of the PLC is not sufficient. See https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_basic_common_errors.html for details and ways to solve the problem. You can also check the PLC log for additional information about the error. Best regards, Georg
Last updated: 2025-12-23

Post by bertus on Axis directions in CNC editor not using right-hand rule? ^{CODESYS Forge talk (Post)}
Hello, Coming from robotics, I'm used to coordinate systems using the right-hand rule. But when I created below small NC program in the Codesys CNC editor, I noticed that the axis triad's Z-axis is flipped (see attached screenshot), resulting in left-hand rule. Is there a setting to change this? Or am I misunderstanding something in the CNC world? N000 G00 X0 Y0 N010 G01 X100 N020 G01 Y50 N030 G01 X0 N040 G01 Y0 N050 G01 Z25
Last updated: 2026-01-02

Post by hackehucke on Mithilfe von SysSocket eine Verbindung herstellen ^{CODESYS Forge talk (Post)}
Hallo zusammen, vorweg: ich habe sehr sehr wenig Ahnung von Codesys, industrieller Kommunikation etc ... Ich soll für ein Seminar mithilfe der Library SysSocket eine HTTP Verbindung zwischen PC und und der Wago PFC200 herstellen, die wir hier im Labor haben. Ich habe mir unterschiedliche Examples von Codesys angeschaut, ChatGPT gepromptet etc. aber komme nicht in die Nähe von irgendwas, das funktioniert. Kann mir jemand ganz einsteigerfreundlich erklären, welche Bausteine ich benötige und was mit diesen getan werden müsste, um das ganze zum laufen zu bekommen? Wäre auf ewig dankbar ... Verzweifle hier langsam :( Viele Grüße
Last updated: 2026-01-07

Post by scrollman on Attribute FB for comment ^{CODESYS Forge talk (Post)}
Masters, I need your help. I can explain in different way. I can get the name and comment of parameter if i use "VARINFO", but right now I want to get name and comment of FB from inside one. I can get the name to use the "{attribute 'reflection'}" but I don't understand how to get comment? Do you have any idea how to do it? Thanks
Last updated: 2026-01-08

Post by peder on Parker Compax3 controlled by Schneider LMC 201 ^{CODESYS Forge talk (Post)}
I have replaced a Parker PAC320 with a Schneider LMC 201 The system has some Parker Compax3 servodrive communicating over EtherCAT. PAC320 is programmed with Codesys 3.5.15. The program is opened in Machine Expert 3.2. But I can not get the commumication running to the Compax3. When I scan for hardware the it seems like the Compax3 is registated, but not the motors. Anyone that have succeded this replacement?
Last updated: 2026-01-13

Post by rtlman on Scan devices hangs CODESYS ^{CODESYS Forge talk (Post)}
Hello, I have a problem that randomly appeared today. When trying to scan a network adapter in "Deploy Control SL" the whole program hangs and needs to be restarted. I have been running "CODESYS v3.5 SP21 Patch 3" for a while and it has worked without any issues until now. I've tried upgrading to "CODESYS v3.5 SP21 Patch 4" with the same result. I've not made any system settings recently that im aware of which could cause this. Has anybody had similar a issue?
Last updated: 2025-12-12

Post by tobiassantos on History of Alarms ^{CODESYS Forge talk (Post)}
I am running tests using the Windows runtime environment. The alarm history is not being logged and displays the error: "Some kind of disk I/O error occurred. Check disk space" in the alarm table. Furthermore, it is not possible to export the alarms. I have already tried to find a configuration field in Alarm storage and Alarm configuration to fix this problem, but I haven't found any related fields.
Last updated: 2026-01-05

Post by tobiassantos on History of Alarms ^{CODESYS Forge talk (Post)}
I am running tests using the Windows runtime environment. The alarm history is not being logged and displays the error: "Some kind of disk I/O error occurred. Check disk space" in the alarm table. Furthermore, it is not possible to export the alarms. I have already tried to find a configuration field in Alarm storage and Alarm configuration to fix this problem, but I haven't found any related fields.
Last updated: 2026-01-05

Post by timvh on KeyPad Function in Visualization to fill a table ^{CODESYS Forge talk (Post)}
Create an array of STRING and 1 INT variable, e.g.: asMyString : ARRAY[0..9] OF STRING; iIndex : INT; Then place a "Table" object in the visualization: - link this to the string array variable. - Check the option "Use Template" - Then in the Input Configuration - add the "Write Variable" command Somewhere else add a "Combobox, array" - link this to the same array. - And link the index to the INT variable. In the Combobox, you can then select one of the strings from the array. The index variable will indicate which selection has been made.
Last updated: 2026-01-08

Post by gseidel on Mismatch between coordinate monitor and actual motion using SMC_GroupJog2, MC_MoveLinearAbsolute (6DOF) ^{CODESYS Forge talk (Post)}
Dear darwin03, my first guess is that the axis scaling of the last axis (joint 6) is not correct. It should be confiugured so that one technical unit equals one angular degree. From the video, it rather looks like 1 technical unit is a full revolution of the joint. (This holds for all rotary axes used with SoftMotion Robotics: they must be scaled so that one technical unit equals one angular degree.) Best regards, Georg
Last updated: 2026-04-07

Post by codegunner on how to convert library from CodeSys 2.3 to CodeSys 3.x ? ^{CODESYS Forge talk (Post)}
hello, ive tried everything and keep getting error like i have opened a file in read only so cannot save no idea what is causing it, file is not read only i cannot even open a new file i make with one variable in 2.3, get same error for read only. do you have a 2.3 file you can send me tomtry and open for a test? thanks
Last updated: 4 days ago

Post by jgalaska on SMC_Trafo 6DOF Config Error ^{CODESYS Forge talk (Post)}
Hello, Recently I was trying to run 6DOF robot in codesys via SMC_Trafo_ArticulatedRobot_6DOF, unfortunately no matter what parameters I tried, it always outputs InvalidConfig Error. I saw the same issue in a topic: https://forge.codesys.com/forge/talk/Motion/thread/16e1f0327f/ But if I understand correctly, the user solved it by developing his own version of this block. I wanted to know if it is a bug in the library (SM3_CNC 4.20.0.0) or am I doing something wrong? Can anyone confirm that they can use the FB without it reporing the Error? Kind regards,
Last updated: 2026-01-21

Post by wollvieh on SP19 Runtime Zugriff auf lokales Dateisystem ^{CODESYS Forge talk (Post)}
Hallo, hier in diesem Beispiel ist $Download$ ein Platzhalter für den kompletten Pfad /home/pi/Downloads/ auf dem Zielsystem, wo die SoftPlc läuft. In der SoftPlc gibt man dann als Dateipfad und Dateiname wie folgt an : '$$Download$$/Datei.txt' Die Datei Datei.txt wird dann auf dem Zielsystem unter /home/pi/Downloads/ angelegt. Pfade darunter werden auch angelegt, z.Bsp.: '$$Download$$/Ordner1/Datei.txt' Beispiel des Platzhalters: [SysFile] PlaceholderFilePath.2=/home/pi/Downloads/, $Download$
Last updated: 2026-01-22

Post by fleaplc on CPU + EtherCAT redundancy ^{CODESYS Forge talk (Post)}
Hi all, for a new project I'm looking for a redundant controller with EtherCAT fieldbus I/O. Actually I'm using Beckhoff and it works great! but there's not a solid redundancy yet... Does someone get experience for industrial application (not raspberry) for a redundant Codesys system? If yes please share some info (CPU / OS type, bus, number of managed I/O,... and especially feeling feedback (stability, bugs, performance)... Every suggestion is kindly appreciated!! Fabrizio
Last updated: 2026-01-27

Post by zeljko2212 on Seeking a Code-Based Solution for EtherCAT Slave Dropout or Master Errors in Production (Beyond Software Hot Reset) ^{CODESYS Forge talk (Post)}
PROGRAM RES_ECAT VAR xMP1: INT; xRESTART: BOOL; xFinish: BOOL; xStop: BOOL; pSlave: POINTER TO ETCSlave; TP1 : TP; STS11: WORD; pSlave6: POINTER TO IoDrvEthercatDriverLib.ETCSlave; MP1: INT; TON1 : TON; xSTAT: BOOL; TP_1 :standard.TP; END_VAR TON1(IN:= NOT TON1.Q, PT:= T#300mS ); TP_1(IN:= ton1.Q, PT:= t#2s ); EtherCAT_Master.xRestart := xRESTART; EtherCAT_Master(); EtherCAT_Master(); xFinish := EtherCAT_Master.xConfigFinished; EtherCAT_Master.xStopBus := xSTOP; EtherCAT_Master(); pSlave := EtherCAT_Master.FirstSlave; WHILE pSlave <> 0 DO pSlave^(); IF pSlave^.wState = ETC_SLAVE_STATE.ETC_SLAVE_OPERATIONAL THEN xRESTART := FALSE; ELSE xRESTART := TP_1.Q; END_IF pSlave := pSlave^.NextInstance; END_WHILE
Last updated: 2026-02-14

Post by nehaltrivedi96 on Modbus connection via Qronox PCD3 M6893 ^{CODESYS Forge talk (Post)}
Hello, I am currently scaling 4-20mA signals and the scaled output (temperature) has to be sent via modbus protocol to a tool like doctor modbus or modbus poll. I have defined my inputs as real as and the output is also real, but to send this output via modbus it has to be of word. So how will i convert real into word and then send the generated output via modbus?
Last updated: 2026-02-18

Post by william on Unit testing support / libraries for EcoStruxure Machine Expert (CODESYS) ^{CODESYS Forge talk (Post)}
Hi, We are investigating available libraries and frameworks for automated PLC unit testing in Schneider EcoStruxure Machine Expert. Specifically, we are looking for: Assertion libraries or test frameworks compatible with Machine Expert CODESYS‑based solutions that are not TwinCAT‑specific Any official or community‑recommended approach for unit testing FB/FC logic offline We have found several open‑source examples, but many appear to be TwinCAT‑dependent and therefore not compatible. Are there any known libraries, best practices, or recommended approaches for implementing unit tests in Machine Expert? Thanks in advance.
Last updated: 2026-02-19

Post by danp1406 on Question about Demo License limitations for Modbus TCP communication and Fieldbus Instances ^{CODESYS Forge talk (Post)}
Hello everyone, I am currently working with CODESYS Virtual Control for Linux running in Docker on a Debian virtual machine. I am deploying my application using Deploy Control SL, and in my project I am using the ModbusFB library to implement Modbus TCP communication. My setup is the following: I am trying to establish a Modbus TCP connection between a virtual PLC (CODESYS acting as Modbus TCP Client/Master) and a Siemens S7-1200 PLC acting as a Modbus TCP Server. From the Debian VM, I can successfully ping the S7-1200 and verify that port 502 is open using tools like nc. Network-wise, everything appears to be correct. However, when running the application in CODESYS, I receive messages such as “Demo mode for Modbus/TCP Master started. Will expire and stop!” and socket errors like “ClientSocket.UpdateStatus socket error 111 disconnecting.” The ClientTCP block from the ModbusFB library attempts to connect, but the connection does not remain stable. My main question is whether the CODESYS demo license explicitly limits or interrupts Modbus TCP Master communication. Is it expected that in demo mode the runtime will automatically close sockets after some time or prevent stable Modbus TCP connections? I would like to confirm whether this behavior is normal when using ModbusFB in demo mode, or if I should continue troubleshooting the configuration. Additionally, I would like clarification regarding the “fieldbus instances” mentioned in CODESYS licensing options (for example, 2, 4, or 16 instances). What exactly is considered one fieldbus instance? Does one Modbus TCP Client block count as one instance? Does each active connection to a different device count separately? Do Modbus TCP Master and Server count independently toward the total number of instances? Finally, I would appreciate clarification on any other practical limitations of demo mode when using industrial communication libraries such as ModbusFB. Are there limits on the number of connections, number of requests, or communication duration? I am trying to determine whether demo mode is sufficient for testing a virtual PLC communicating with a Siemens S7-1200 over Modbus TCP, or whether a full license is required even for this kind of validation scenario. Thank you in advance for any guidance.
Last updated: 2026-02-25

Post by stefan-gimpl on Beobachtungszeitpunkt ^{CODESYS Forge talk (Post)}
Guten Tag, irgendwas ist hier im Argen, die Status werden nicht richtig angezeigt. Im Bild im Anhang wird die Variable in Zeile 16 CollectiveAlarm auf false gesetzt, es wird aber true angezeigt. In Zeile 17 frage ich testweise den Status nochmals ab, der ist auch false, obwohl die Variable CollectiveAlarm noch immer true anzeigt. Was kann hier die Ursache sein? Gibt es einen Beobachtungszeitpunkt, wann die Werte abgefragt werden?
Last updated: 2026-03-04

Post by sulzbrunn on Codeys Installation freezes while attempting to install packages ^{CODESYS Forge talk (Post)}
Hi, I am facing the same problem: I am trying to install CODESYS 3.5.17.60 The last log entries are: ... InstallShield 14:18:17: Done Initializing... InstallShield 14:18:17: Registering Msi Server... InstallShield 14:18:17: Invoking script function InstallOEMPackages 1: [CDS Info]: CDS_OEMPACKCOUNT: 47 1: [CDS Info]: CDS_OEMPACKCOUNTALL: 47 Action 14:18:17: CDSInstallOEMPackages. Install all Packages added to the setup 1: [CDS Info]: Call: C:\PROGRA~2\CODESY~1.60\CODESYS\Common\PACKAG~2.EXE --profile="CODESYS V3.5 SP17 Patch 6" --installAll="C:\Users\UserXXX\AppData\Local\Temp{94C03~1\Packages"
Last updated: 2026-03-19

Post by aapostolidis on _NEW when used with classes and interfaces. Interface shows "Hidden Instance" in watch. ^{CODESYS Forge talk (Post)}
Hello, im using dynamic memory allocation with the NEW()-operator. When i instanciate a class with the NEW()-operator and want to debug/watch the interface of the class, the watch is only showing "Hidden Instance" (See attached screenshot). Is there any possibility to debug the interface data ? The interface is working properly but the debugging by the watch is not possible, what is a big disadvantage. Thank you. Best Regards, Alexander
Last updated: 2026-03-24

Post by tommyk-mar on Smooth path is not working with SMC_NCInterpreter ^{CODESYS Forge talk (Post)}
Hello, Im using SMC_NCInterpreter and SMC_NCReadFile2 to read gcode program for CNC machine and what I have observed is that G51 and G52 is not smoothing the path. Machine stops in every point, what could I do to make machine pass through the points without stopping or what could allow me to use smooth path corretly if I use NCInterpreter. Im using it because I want to add variables to my gcode and its not possible directly from the CNC editor thats why I do use external file. Any ideas?
Last updated: 2026-03-26

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