Post by xabier on License Activation Problems ^{CODESYS Forge talk (Post)}
I bought two license and install with out problems....but the problem was when i changed the image in my controler and when i want activated again the license i have a problem Appear this 2 softcontainer and i can´t install any license again... Can someone help me please?
Last updated: 2024-06-24

Post by snguyen on Any ways to prevent Infinite scroll when moving an object to the left or top edge? ^{CODESYS Forge talk (Post)}
I've been making few HMIs and I'm starting to get annoyed that whenever I try to align an object to the left or top side of the frame, it quickly scrolls into that direction infinitely. Is there a way to prevent that?
Last updated: 2025-10-24

Post by timvh on Persistent Retain Variables Not Visible in Online View (WAGO PFC100 + CODESYS) ^{CODESYS Forge talk (Post)}
It is a known issue. It only happens with CODESYS and Wago controllers and the Persistent Variables. It seems related to using 64 bit variables in the PV list (e.g. LREAL). Internally in the PLC everything works okay. It is just a monitoring issue.
Last updated: 2025-10-26

Post by salmawis on Advice on OOP hardware I/O code structure ^{CODESYS Forge talk (Post)}
Call 10 FB instances. Connect Motor_1_Fault to the i_xHW_FaultDetected pin of FB 1, Motor_2_Fault to FB 2... By doing this, your FB will be flexible. The programming will be smooth like a perfect Drift Boss, instead of "hitting the wall" because it can't be reused!
Last updated: 2025-10-31

Post by scrisp on Source code changes since last download ^{CODESYS Forge talk (Post)}
Why does CODESYS 3.5 show the message “Source code changes since last download” even though I did not create or modify any new variables? When I go online with the PLC, it detects changes and suggests synchronizing, but nothing was actually changed in the project. What could cause this and how can I fix it?
Last updated: 2025-11-28

Post by aniket-b on Scara3 kinematic robot error ^{CODESYS Forge talk (Post)}
Here I have attached the task monitor data. What is very weird is that I am using MC__MoveDirectAbsolute FB, when I choose Vel/ACC/Jerk Factor to 1.0 it run fine. It ran 10 hours without the issue. But I get the error randomly when I use factor as 0.5
Last updated: 2025-12-29

Post by dat422 on OPC UA Enum Issue ^{CODESYS Forge talk (Post)}
Hi everyone, I’m using CODESYS V3.5 SP22 with the Communication Manager to run an OPC UA server. I have a problem with enums: when I view them in a client like UaExpert, only the last enum member is shown, and it has the wrong value. Has anyone seen this issue before or knows what might cause it? Thanks!
Last updated: 2026-03-27

Post by nulltrace on Modbus TCP Server connection is ESTABLISHED but all holding registers are value 0? ^{CODESYS Forge talk (Post)}
your case looks different, the first one was an codesys modbus tcp-slave, your's an Master-Application with gateway. I dont know this Unit, but i would say, from Point of Codesys it looks wrong configured. Just give us more detailed configuration and the please make a sketch of the topology you're trying to realise.
Last updated: 2026-04-08

Post by gseidel on Movesuperimposed Command Aborted Error ^{CODESYS Forge talk (Post)}
Hi transcend, most likely cause: one of the motion FBs was not called in each IEC cycle. See https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_basic_common_errors.html. A different possible error, if you are using buffermode buffered or blending: the execution order of the motion FBs was wrong. See https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_buffermode_execution_order.html. Best regards, Georg
Last updated: 2026-04-13

Post by timvh on Modbus Extended Registers ^{CODESYS Forge talk (Post)}
Maybe the following helps: https://forge.codesys.com/prj/codesys-example/modbus/home/Home/
Last updated: 2023-08-26

Post by ellcap on Symbol Configuration, I'm doing it wrong ^{CODESYS Forge talk (Post)}
if you're here because you are making the same mistake as me, I just resolved it. I mistakenly thought I didn't need to write the word attribute in the column labeled attribute. changed this 'symbol' := 'read' to this attribute 'symbol' := 'read' The last two in this clip are still wrong: I recongize this is probably a big "duh". That's ok. I like to fail out loud in hopes it helps someone else from looking silly.
Last updated: 2023-08-31

Post by dasch on eCockpit - unable to start simulation ^{CODESYS Forge talk (Post)}
This is a known bug in e!Cockpit. See Release notes of V 1.11: 1 e!Cockpit Release Version 1.11 (2022-07) ATTENTION: If a library that uses asynchronous tasks (e.g. WagoAppConfigTool, WagoAppCloud or function modules such as Dali-Master) is dragged into the project, the simulation cannot be started. It is already sufficient to add the library to the project (an FB does not even have to be instantiated). I guess you are using one of these libraries/modules in your project. We e.G. often use PWM modules, these are also affected.
Last updated: 2023-09-05

Post by eschwellinger on Code Size ^{CODESYS Forge talk (Post)}
will start with next relaese on RTE, at the moment not possible.
Last updated: 2023-09-08

Post by john-ronald on Communication error (#0), logout performed,please check if plc is connected ^{CODESYS Forge talk (Post)}
Hi, I have the same problem. However I am using ethernet connection not USB. I can ping the PLC and also connect to it via Wago ethernet settings, but I cannot upload using the Codesys 2.3. My PLC is Wago 750-862. The detailed error is - " connect: Connection refused Write attempt from invalid socket. " Any help would be appreciated.
Last updated: 2023-09-11

Post by bpbonker on Error index was outside the bounds ^{CODESYS Forge talk (Post)}
Still a problem in 3.5.19.20 which is absolutely ridiculous.
Last updated: 2023-09-19

Post by jeffgamsby on Accessing ModbusTCP addresses from python ^{CODESYS Forge talk (Post)}
Hi, I am new to modbusTCP and I am trying to access Input registers from codesys (3.5.SP13). The offset is 16#0000 and I am trying to access Channel 1[24] %IW24 to pull analog values. I am using pyModbusTCP and I need to supply a modbus address and the number of registers to read. What does 16#0000 mean in terms of the actual offset, how do I translate this number plus the channel to access this info via python? Any help would be appreciated, thank you.
Last updated: 2023-09-20

Post by nico01 on Integer with comma in visualization ^{CODESYS Forge talk (Post)}
Hello everyone, I created a visualization with a lot of REAL, with one or two digits after the decimal point. This causes me problems in terms of rounding and memory... is it possible to display an integer with a comma, like with PROFACE or SIEMENS? It's just an "abuse" of display, the comma is just on the visualization. This limits the memory (16 versus 64 bytes) and rounding is easier to manage... See print screen on proface software THANKS
Last updated: 2023-09-20

Post by snhatton on CANopen Example: ^{CODESYS Forge talk (Post)}
Can you try the command "Download Missing Libraries"?
Last updated: 2023-09-21

Post by mondinmr on Jitter problems on imx8 ^{CODESYS Forge talk (Post)}
We are experiencing serious jitter issues on an ARM64 imx8. Until now, on rpi and beaglebone derivatives, and on Intel, we never encountered jitter issues unless they were already present on the device. In this case, as can be seen from the attached graph, we have excellent maximum latency. The cyclictest on the isolated core dedicated to IEC CODESYS tasks shows a latency of 37µs, with an average of 14µs. Usually, on all other devices, with an RT kernel, with the appropriate parameters to avoid frequency throttling, with properly managed IRQs, and with the disabling of large page sizes, the jitter measured by CODESYS is very close to the cyclictest latency. However, on this imx8, we are noticing a fluctuating value of +/- 300µs that seems to be added to this latency, as if something occasionally miscalculates the sleep times by exactly +/- 300µs. Two screenshoot attached. - Result of cyclictest - Jitter on CODESYS Tasks are assigned to isolated core!
Last updated: 2023-10-18

Post by john-martin on RPI is license server down ^{CODESYS Forge talk (Post)}
In this moment the server is down.
Last updated: 2023-10-19

Post by simotion on Online view : code is scanned ^{CODESYS Forge talk (Post)}
If I do online monitoring of code in f.i. a function block, I cannot see if the function block is called or not. In software from other vendors you normally have an indication if the online code you are looking on is scanned at that moment or not. Is there a way in Codesys to determine in the online view if (parts) of the code are scanned or not? Thanks
Last updated: 2023-10-23

Post by eschwellinger on Recipe issue. ^{CODESYS Forge talk (Post)}
...add Visu Util libraray in the library Manager?
Last updated: 2023-10-27

Post by eschwellinger on install codesys runtime on linux ^{CODESYS Forge talk (Post)}
could you try to add the command in Tools-customize
Last updated: 2023-11-04

Post by joanm on Tab control element, hide/show tabs programatically? ^{CODESYS Forge talk (Post)}
Hi all, Is it possible to hide or show tabs from the PLC code? I have created a few tabs in my visualizations to configure the program behavior, I'd like to be able to hide some of them if the related option in the main tab has been disabled. Is that possible? if so, how should I do it? Thank you all in advance.
Last updated: 2023-11-25

Post by bulentturk on Unbound Placeholder ^{CODESYS Forge talk (Post)}
I have the same problem, does anyone have a solution?
Last updated: 2023-12-02

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