Is a Reset possible for the CoDeSys soft PLC? ^{CODESYS Forge talk (Thread)}
Is a Reset possible for the CoDeSys soft PLC?
Last updated: 2024-01-18

Data Transferring between 2 PLCs in a same PC ^{CODESYS Forge talk (Thread)}
Data Transferring between 2 PLCs in a same PC
Last updated: 2024-02-06

Codesys HMI with a non codesys programmed controller ^{CODESYS Forge talk (Thread)}
Codesys HMI with a non codesys programmed controller
Last updated: 2024-02-21

build (F11) / generate code using a python script file ^{CODESYS Forge talk (Thread)}
build (F11) / generate code using a python script file
Last updated: 2024-04-11

Reading Named Pipes in Linux Is there a better way? ^{CODESYS Forge talk (Thread)}
Reading Named Pipes in Linux Is there a better way?
Last updated: 2024-05-09

Discontinuity of A/B/C axis movement. ^{CODESYS Forge talk (Thread)}
Discontinuity of A/B/C axis movement.
Last updated: 2024-05-09

How to display the application name on a visualization (V3.5.16) ^{CODESYS Forge talk (Thread)}
How to display the application name on a visualization (V3.5.16)
Last updated: 2024-05-16

Open a POU in the editor via scripting ^{CODESYS Forge talk (Thread)}
Open a POU in the editor via scripting
Last updated: 2024-05-30

Using globals without a prefix (bMyTag vs GVL.bMyTag) ^{CODESYS Forge talk (Thread)}
Using globals without a prefix (bMyTag vs GVL.bMyTag)
Last updated: 2024-06-04

Error when creating a new HTML5 visualisation ^{CODESYS Forge talk (Thread)}
Error when creating a new HTML5 visualisation
Last updated: 2024-06-14

Publish a JSON payload via MQTT Publish (using IIot Libraries) ^{CODESYS Forge talk (Thread)}
Publish a JSON payload via MQTT Publish (using IIot Libraries)
Last updated: 2024-06-18

Is there a way to run --runscript in linux system? ^{CODESYS Forge talk (Thread)}
Is there a way to run --runscript in linux system?
Last updated: 2024-06-26

EL6910 as a PROFIsafe F-Host in Codesys ^{CODESYS Forge talk (Thread)}
EL6910 as a PROFIsafe F-Host in Codesys
Last updated: 2025-10-23

Configuring a CIP object for Explicit Message ^{CODESYS Forge talk (Thread)}
Configuring a CIP object for Explicit Message
Last updated: 2025-10-24

How to stay in a method until something is finished. ^{CODESYS Forge talk (Thread)}
How to stay in a method until something is finished.
Last updated: 2025-11-04

Add a dynamic text on One Visualization from another ^{CODESYS Forge talk (Thread)}
Add a dynamic text on One Visualization from another
Last updated: 2025-11-18

Codesys IDE initialization error from a new Sandbox image ^{CODESYS Forge talk (Thread)}
Codesys IDE initialization error from a new Sandbox image
Last updated: 2025-12-05

KeyPad Function in Visualization to fill a table ^{CODESYS Forge talk (Thread)}
KeyPad Function in Visualization to fill a table
Last updated: 2026-01-08

Post by vstrom on Codesys v3.5.22.10 - Fail to create a project Archive ^{CODESYS Forge talk (Post)}
Hello TimvH, thanks a lot! :)
Last updated: 2026-04-27

Codesys v3.5.22.10 - Fail to create a project Archive ^{CODESYS Forge talk (Thread)}
Codesys v3.5.22.10 - Fail to create a project Archive
Last updated: 2026-04-27

Deploy Codesys Control SL to a 'secure' device ^{CODESYS Forge talk (Thread)}
Deploy Codesys Control SL to a 'secure' device
Last updated: 5 days ago

Post by john-robinson on Limiting Memory Access of an Array to Within its Bounds ^{CODESYS Forge talk (Post)}
Recently we had an issue regarding some simple code to calculate a rolling average. The code indexes from zero to 199 to properly store the current input into a circular buffer which then allows us to calculate a rolling average: VAR input_5s : REAL; outs_arr : ARRAY[0..199] OF REAL; i : USINT := 0; END_VAR ___ //this code runs every five seconds, calculating a rolling average outs_arr[i] := input_5s; i := i + 1; output := OSCAT_BASIC.ARRAY_AVG(ADR(outs_arr), SIZEOF(outs_arr)); IF i >= SIZEOF(outs_arr) THEN i := 0; END_IF There is a simple bug in this code where the index will be set to 0 when it has surpassed the length of the array in bytes (800 in this case) rather than larger than the number of reals in the array (200). The solution here is simple, replacing i >= SIZEOF(outs_arr) with i >= SIZEOF(outs_arr)/SIZEOF(outs_arr[0]). In this example when the index increased to 201 and the line outs_arr[201] := input_5s was called, codesys arbitrarily wrote to the address in memory that is where outs_arr[201] would be if the array was that long. I would like to find a way to wrap the codesys array inside of a wrapper class that checks if an input is within the bounds of an array before writing to that value. I know how I would implement that for a specific array, I could create a method or class that takes an input of an array of variable length, ie. ARRAY[*] OF REAL, but I don't know how to make this for any data type. I am wondering if anyone has ever done anything similar to this, or has any better suggestions to ensure that none of the programmers on this application accidentally create code that can arbitrarily write to other locations in memory.
Last updated: 2024-03-05

Post by tvm on Web Client (HMI) Disconnects from Webvisu (Weidmuller u-OS) ^{CODESYS Forge talk (Post)}
ok, that's different than our issue then. We're using Schneider Electric M262 PLCs, and we've had it where certain web browsers cause the web server to only allow https connections, but it's not recoverable with a refresh. It usually requires a power cycle or even a full firmware flash. Your issue might have more to do with the timing. I don't know if it helps you, but we normally run our visu task at 200mS, with an update rate of 200mS. Seems to work. I went through this: https://faq.codesys.com/pages/viewpage.action?pageId=112525371 but it really seems like trial and error.
Last updated: 2023-09-06

Post by dkugler on Webvisu client connection monitoring ^{CODESYS Forge talk (Post)}
you can give this code snippet a try. It's extracted and simplyfied from my code: Install VisuElemBase lib if not installed yet. Execute in visu task: VAR pClientData : ARRAY [-1..100] OF POINTER TO VisuElemBase.VisuStructClientData; END_VAR VisuElemBase.g_ClientManager.BeginIteration(); pClientData := VisuElemBase.g_ClientManager.GetNextClient(); WHILE pClientData <> 0 DO pClientData[pClientData^.GlobalData.GlobalClientID] := pClientData; END_WHILE You have to make shure every no longer updated pointers in the array have to be deleted and no longer used by your code! Usage of this pointer access at your own risk :-) Works with SP16. From SP17 and newer there will be warnigs etc. using this solution as I remember. It will be great, if Codesys publishes a example or give a hint how to accesse this client values with the VisuUtil lib or other future-proof way!
Last updated: 2024-09-09

Post by shabroz-gill on Exception when OPCUA datasource disconnects from Server ^{CODESYS Forge talk (Post)}
If i loose the network and the opcua data source suddenly looses connection with the server, i get an exception and my application stops working. I am using the latest version of the communication add v4.5.2.0 Is this a known issue? This makes the datasource unusable because it is inevitable that we will loose connectivity at some point, and the datasource crashing everything due to that seems to be a deal breaker. I can provide more details is someone from codesys is reading this. You can recreate is by just shutting off the Opc server after the codesys data source is connected and reading data from it. The codesys app does not crash everytime and sometimes it is able to reconnect without crashing, so you may have to try this a few times to see the exception. Best regards
Last updated: 2024-09-16

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