Post by sachem on SysFileGetTime problem ^{CODESYS Forge talk (Post)}
Good morning. I'm working with a Weidmuller controller using Codesys. My project use OPC-UA to communicate an application in my pc with the controller. Yesterday, I installed the license of the controller and test it, and the communication works perfect. I use the communication with anonymous login, and works fine. But, hours later, the anonymous login don't work, and the controller only allows connection via OPC with username and password. Someone know why this happend? Thanks
Last updated: 2024-04-09

Post by engrahman on The current baud rate could not be determined in CR0020 IFM with maintenance tool ^{CODESYS Forge talk (Post)}
Hello everyone, im working with IFM CR0020 controller via RS232 protocol where im trying to connect it to my PC but, every time when im using the maintenance tool to identify the device i get the error "The baud rate could not be determined" i have tried to change the cable of RS232 with different types but the error presist, any idea how to fix it
Last updated: 2024-05-21

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 eschwellinger on RS485 CAN HAT to Cosesys ^{CODESYS Forge talk (Post)}
Hi if you add in (ttyAMA0 should fit to your HAT's device [SysCom] Linux.Devicefile.1=/dev/ttyAMA0 to /etc/CODESYSControl_Usr.cfg since 4.12.0.0 version /etc/codesyscontrol/CODESYSControl_Usr.cfg then access in CODESYS with Com1 should do it. Keep in mind that only adapters work (for RS485) which do determine the send/receive direction in hardware
Last updated: 2024-10-28

Post by chocojun on CODESYS WebSocket Client (IIOT Library) ^{CODESYS Forge talk (Post)}
Has anyone used a library related to websocket client? I will be in charge of websocket client in CODESYS, and websocket server in python. In CODESYS, I will use WebSocketClient(FB) WebSocketRead(FB) WebSocketWrite(FB) to configure the client, Does anyone know an example of how to use it? Please help me.
Last updated: 2025-03-31

Post by chocojun on CODESYS WebSocket Client (IIOT Library) ^{CODESYS Forge talk (Post)}
Has anyone used a library related to websocket client? I will be in charge of websocket client in CODESYS, and websocket server in python. In CODESYS, I will use WebSocketClient(FB) WebSocketRead(FB) WebSocketWrite(FB) to configure the client, Does anyone know an example of how to use it? Please help me.
Last updated: 2025-03-31

Post by cebador on trouble with running a python script on Raspberry via Codesys ^{CODESYS Forge talk (Post)}
Hello, I am new to Codesys and I'm having trouble with running a python script on my Raspberry. SysProcessExecuteCommand2 gives result 25 and nothing happens. I used chmod +x and chmod 666 on my script. In terminal it's working when I'm using the same command line as in Codesys. Code in attatched screenshot. Thank You in advance.
Last updated: 2025-07-23

Post by mondinmr on Frustration-Fueled Feedback on Project File Management and Git Integration ^{CODESYS Forge talk (Post)}
In reality, other vendors are already moving towards integration with VS Code. B&R, for example, is likely the only one that could truly challenge Codesys in the market: they’ve overhauled their once-archaic environment (previously lacking ST OOP) and are now catching up significantly with Automation Studio Code, offering modern programming capabilities and native support for tools like Git and GitHub Copilot. The other big names in the market, frankly, are still light years behind. For smaller projects, typically handled by “wire strippers” (with all due respect!), a classic environment might be just fine. But once you’re dealing with thousands or even millions of lines of code—possibly organized in an OOP paradigm, spanning large teams, integrating third-party libraries, requiring version control, and performing comprehensive tests—a lightweight, responsive editor supercharged with AI-based features becomes essential. The real strength of something like VS Code lies in its vast ecosystem of extensions and integrations: from advanced Git support to automated build/test pipelines, and even AI-assisted autocompletion that already makes software development much more agile and productive. I understand that a PLC project involves more than just ST code (task setup, fieldbus configuration, libraries, etc.). However, there’s no technical reason not to at least provide ST files in a pure text format, making version control and collaboration far easier. B&R has clearly adopted this approach; I hope Codesys will accelerate its own efforts to offer a native, text-based integration and modern development tooling. Once you go beyond a certain level of complexity—dozens of configurations, OOP hierarchies, and distributed teams—you really do need “engineer-level” software tools, not just solutions targeting “wire strippers.” For large-scale automation projects, a more open and flexible approach is the only way to avoid chronic frustration. Let me emphasize that I truly love Codesys and consider the work done so far to be brilliant—I’d be sorry to see it overshadowed by others moving faster in this direction.
Last updated: 2025-02-18

Post by artem1223 on Synaxis of library declarations in the ST ^{CODESYS Forge talk (Post)}
Codesys 3.5 17.30, plc - crevis GN-9373. I need to use RTC of pls for write in registers (need to check difference of writen 100 and 200 registers). For this i try to use SysTimeRtc (SysTimeRtc.SysTimeRtcGet) but its not working. After it i tryed to use SysTimeGetMs and something like this but still not working. Library? Mb but check project, SysTime with SysTimeRtc already, all what i know - already is here. Its my first try to learn ST (early used fbd and ladder, yeah), pls help with it. Mb problem with a syntaxis, but im not sure.
Last updated: 2025-11-26

Post by andrebrandt on FB string and naming ^{CODESYS Forge talk (Post)}
Hi Tim. Not quite correct. What i'd like, is when you place the FB in prog, i choose a block NTC10k, and name this RT401. What i'm trying to do, is to get the name RT401 automaticly into the FB, so i can put this into the string i pass in a struct. So in var in POU, i saw this a place i could do this, RT401: NTC10k(Tag:='RT401'), but i can't get this to work. I shurly must have had something like this in FB: FUNCTION_BLOCK NTC10k String TAG But it's here where I'm stuck...
Last updated: 2024-09-30

Post by alexgooi on Function Blocks and arrays of function blocks ^{CODESYS Forge talk (Post)}
Hi Jack, I think you have to look at a FB in a different way. A Function block (Class) can contain its own data. In other words don't define loose data in your GVL, but define a instance of a FB (Object) in your GVL: Example: Function_Block Basic_Class VAR_INPUT Open_Command: BOOL; END_VAR VAR_OUTPUT Opened: BOOL; END_VAR if Open_Command then Opened := TRUE; ELSE Opened := FALSE; END_IF Global Variables Objects: ARRAY[1..100] OF Basic_Class; //Here you ar defining you objects END_VAR In your code you can directly acces the data and couple it to the IO: GVL.Objects[1].Open_Command := %IX0.0; %QX0.0 := GVL.Objects[1].Opened; //To call the code itself use: GVL.Objects[1](); If you want to take this a step further you are also able to add methods and properties to the FB/Class end thereby creating a OOIP program
Last updated: 2024-02-15

Post by martinlithlith on Mux I2C ^{CODESYS Forge talk (Post)}
Hi! I´ll try to get this thread going again as i´m having simliar problems. Right now i get a red triangle on my connected devices (i´m testing with a BME280 sensor and a PCA9685 resvo driver). The TCA9548 have the green symbol beside it. On the "red" devices i get that the bus is not running. I have tried to either run it using the parent bus cycle setting or creating a new freewheeling task prio 1 but nothing helps. I have compared my settings to the settings from the example from the MUX package and i have read (i think) every thread in forge that could be of interest. EDIT: The ic2detect only shows the mux (70-70) and the servo drive (70-76) so i´ll look in to if i managed to burn the 280-sensor while soldering). Another question regarding the 280 sensor. I have a sensor GY-BM E/P 280 that should record humidity and temperatur. Could this be a problem with the library? Does anyone have an idea of what i might be doing wrong? I have some experience from Codesys but not much so this could be an easy one. All suggestions are welcome. I tried to upload the project archive but it did not work. Should i upload the export or how could i show you my horrible project? Best, Martin
Last updated: 2023-10-22

Post by dtamm on How to read string from CharBufferPtr? ^{CODESYS Forge talk (Post)}
I am trying to implement a mechanism to send alarm SMS. For this, I have created an Alarm Class with a Notification Action which calls a POU. This POU implements IAlarmNotifiable making it selectable in the Alarm Class configuration. IAlarmNotifiable has an Execute method which is called by the alarm class. Now, I want to extract the alarm message of the triggered alarm. The Execute method comes with a VAR_INPUT itfAlarm: AlarmManager.IAlarm which supplies a method called GetMessage. The help text says: Returns the message text, that has been configured for the alarm. The result is a pointer to the buffer, where the message text is stored The type of the result is CharBufferPtr, and at some place I read that it can be interpreted as a pointer to string. But I cannot manage to extract the alarm message, all I get are numbers. I have tried the following: psAlarmText := itfAlarm.GetMessage(__SYSTEM.TYPE_CLASS.TYPE_STRING)^; sAlarmText := TO_STRING( itfAlarm.GetMessage(__SYSTEM.TYPE_CLASS.TYPE_STRING)^ ); So how do I get access to the alarm message as clear text? (In this case, "Larm 1")
Last updated: 2024-02-21

Post by lamine97 on Issue with Timer-Based Increment Function in CoDeSys Ladder Logic (LD) ^{CODESYS Forge talk (Post)}
I am trying to implement a Ladder Logic (LD) function block in CoDeSys that increments a value A by B every T time interval. My Structured Text (ST) version works perfectly in simulation, but when I implement it in LD, it does not work. The ST code: PROGRAM ADDITION VAR_INPUT A : LREAL ; B : LREAL ; T : TIME ; END_VAR VAR Timer : TON ; END_VAR Timer (IN:=TRUE, PT := T); IF Timer.Q THEN A := A + B ; Timer(IN := FALSE ) ; END_IF;
Last updated: 2025-03-25

Post by alimans on OPC-UA Server, Symbol Set: Raise an error: Object reference not set to an instance of an object. ^{CODESYS Forge talk (Post)}
Hi everyone, I just created a very simple library without any code and, added it to my very simple project. after adding this library, I get an error when I try to open "Symbol Set" in "OPC UA Server" in "Communication Manager". Here is the code of my POU in the library: FUNCTION_BLOCK POU VAR eCommand : (CMD_NONE:=0, CMD_RESET:=-1) INT := CMD_NONE; END_VAR Attached is the error that I get. I also noticed that by removing the enumeration variable above (eCommand), I can open the "Symbol Set" again. Anybody has any idea why this error is raised and how could I use enumeration variables without error in "OPC UA Symbol Set"?
Last updated: 2024-08-08

Post by jari-koivuluoma on Newly created texlists wont appear in the selection dropdown ^{CODESYS Forge talk (Post)}
When I create a new textlist in Codesys 3.5 SP19 Patch 5, it wont appear in the dropdown menu at Rectangle element > Dynamic texts > Text list. If I just type the name of the textlist to the field (in quotes), I get an error saying that some file is missing. Any good ideas what to do and what is going on. I recently updated to that version and I only now noticed this when I needed to add a new textlist so Im quite screwed with this not being able to add text lists. While im typing this, I tried copying an existing list and modifying it and it seems to show. Any ideas?
Last updated: 2024-09-19

Post by sebastianrapi on Bibliothek: floatingpointutils ^{CODESYS Forge talk (Post)}
@Strucc.c: thanks very mutch. Yes, I think that was the problem. I tried yesterday a similar function, i have found: IEEE32 in REAL FUNCTION IEEE32_TO_REAL : REAL VAR_INPUT IN:DWORD; END_VAR VAR PTREAL:POINTER TO REAL; END_VAR PTREAL:=ADR(IN); IEEE32_TO_REAL:=PTREAL^; END_FUNCTION REAL in IEEE32 FUNCTION REAL_TO_IEEE32 : DWORD VAR_INPUT IN:REAL; END_VAR VAR PTDWORD:POINTER TO DWORD; END_VAR PTDWORD:=ADR(IN); REAL_TO_IEEE32:=PTDWORD^; END_FUNCTION http://www.oscat.de/community/index.php/topic,357.0.html And this works perfect. Now, the only thing that isn't clear is the libary "FloatingPointUtils, 3.5.17.0 (System)"... For me, the libary doesn't work. But the problem is now solved. Thanks a lot.
Last updated: 2024-11-21

Post by timvh on Dynamically enabling/disabling Modbus slave devices in runtime (performance issue with timeouts) ^{CODESYS Forge talk (Post)}
As far as I remember, the Reconfigure functionality doesn't work for Modbus devices. But... Each Modbus device in your device tree has a name. You can set the property "Enable" of this device to FALSE to stop communicating with it. So if one of your Modbus Slave devices name is "MbSlave1" in the device tree, then in your code you can set the Enable to FALSE to let it stop communicating: MbSlave1.Enable := FALSE; Please let us know if this worked on your controller with your application and your CODESYS version. Alternatively you could use the ModbusFB library. See: https://forge.codesys.com/prj/codesys-example/modbus/home/Home/
Last updated: 2025-08-13

Post by mohammadasif on Blink Function definition is wrong in codesys online help ^{CODESYS Forge talk (Post)}
https://content.helpme-codesys.com/en/libs/Util/Current/Signals/BLINK.html in the above link, please correct your website the following: "Output value, starts with FALSE and switches between TRUE and FALSE for the given high and low times" it should actually be: "Output value, starts with TRUE and switches between TRUE and FALSE for the given high and low times" if not please let me know if this has changed in a util library update, in your older website it has the right definition here: https://help.codesys.com/webapp/blink;product=codesys;version=3.5.11.0
Last updated: 2023-12-28

Post by jasperclauwaert on Persistent Retain Variables Not Visible in Online View (WAGO PFC100 + CODESYS) ^{CODESYS Forge talk (Post)}
Hi everyone, I’m working on a WAGO PFC100 with CODESYS. During development everything worked fine, but in the final stage I set several variables to PERSISTENT RETAIN. When I go online, most of these persistent variables cannot be monitored. Instead, I see: <Value of the expression cannot be retrieved> Interestingly, a few variables do show their values correctly, but the majority do not. The variables are not used as pointers or in any unusual way. The application compiles and runs without errors. Has anyone experienced this before? Is this a known issue with PFC100 or CODESYS? Any ideas on what could cause this behavior? Thanks in advance! Jasper
Last updated: 2025-10-23

Post by jasperclauwaert on Persistent Retain Variables Not Visible in Online View (WAGO PFC100 + CODESYS) ^{CODESYS Forge talk (Post)}
Hi everyone, I’m working on a WAGO PFC100 with CODESYS. During development everything worked fine, but in the final stage I set several variables to PERSISTENT RETAIN. When I go online, most of these persistent variables cannot be monitored. Instead, I see: <Value of the expression cannot be retrieved> Interestingly, a few variables do show their values correctly, but the majority do not. The variables are not used as pointers or in any unusual way. The application compiles and runs without errors. Has anyone experienced this before? Is this a known issue with PFC100 or CODESYS? Any ideas on what could cause this behavior? Thanks in advance! Jasper
Last updated: 2025-10-23

Post by damian177 on Codesys V3.5 + Pixtend v1.3 + RaspberryPi ^{CODESYS Forge talk (Post)}
Hi, I use Pixtend v1.3 with my RaspberryPi with Codesys V3.5 SP15 Patch1. Actually in my project I used two packages: - CODESYS Contro for Raspberry PI 3.5.15.10 - PiXtend for CODESYS 1.3.8.0 Now I would like to extend my project about the IIot Libraries SL package, I installed them. Next I added SMS_Service_SL 1.0.0.8 version library and I have problem with compile my project because I get error: [ERROR] PiXtend_DemoProject_q: Library Manager [Device: PLC Logic: Application]: Could not open library '#CAADTUtil'. (Reason: The placeholder library 'CAADTUtil' could not be resolved.) Any have idea what can I do to properly add SMS library to my project?
Last updated: 2023-09-26

Post by ricola on Change default node Id name on Raspberry Pi ^{CODESYS Forge talk (Post)}
EDIT : https://forge.codesys.com/forge/talk/Engineering/thread/cb5a492aa0/ hyplcmotion - 2022-12-16 Found out how! Needed to connect to PFC200 via Putty, and open CodesysControl.cfg with “sudo nano /etc/CODESYSControl.cfg”. Then adding following command to the end of file, and use the name you want, save/close CODESYSControl.cfg, and reboot your PLC. [CmpOPCUAProviderIecVarAccess] CustomNodeName= PFC200 Hi! , I'm digging up this issue cause we have still this long name within current versions on CodesysControl. Is it a lock for "demo" licences or can it be changed in some way ? This DeviceSet name is too way long with spaces inside, not easy to handle with string parsing... Cheers !
Last updated: 2024-10-10

Transparency of element rectangle works only in simulation not in WebVisu ^{CODESYS Forge talk (Thread)}
Transparency of element rectangle works only in simulation not in WebVisu
Last updated: 2023-05-25

Can "Best Fit in Online Mode" be used in Visualization CE ^{CODESYS Forge talk (Thread)}
Can "Best Fit in Online Mode" be used in Visualization CE
Last updated: 2012-05-31

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