Post by ph0010421 on ModbusTCP_FunctionCode06 ^{CODESYS Forge talk (Post)}
Hi You can add a channel to the standard Modbus TCP library with FC06. From the device tree, add Ethernet device, ModbusTCP master then finally a ModbusTCP slave (your power meter). You can add read/write channels (for any FC) in here. As you add these devices, the necessary libraries will be inserted for you. Alternatively, I have a ModbusTCP client/server library if your RT doesn't have Modbus (I think they all do these days?)
Last updated: 2026-05-18

Post by eschwellinger on cannot connect ot linux runtime: device does not answer the scanrequest ^{CODESYS Forge talk (Post)}
for me looks like you do not use latest CODESYS IDE version, there is a known bug if you use a newer runtime your are forced to use a more complex password as user for the login. The old IDE version does not show this problem on login. so either update CODESYS or use a pw which meet the complexity requirements.
Last updated: 2026-06-11

Post by mondinmr on COL.IMap2 and HashTableFactory cause frequent Access Violation ^{CODESYS Forge talk (Post)}
Good morning, I’ve been using the Collection library for a long time, mostly with Stack, LinkedList, and List. From your examples I was able to manage the different factories, even for custom elements. Now I need a hashtable, but with this object I’m running into a lot of random access violations. If I append something inside FB_Init after constructing the hashtable, it crashes, even though the list was already created. If I only create the hashtable in FB_Init and append afterwards, it usually works. I don’t understand the meaning of the dispose call in this code: pSlave := ADR(slave); uSlave := TO_ULINT(pSlave); iKey := fKey.Create(uSlave); IF hash.CountKeys() = 0 THEN Service.logger.appendLog('Filling hashtable', 'HashManager', AdvLogType.AdvDebugMsg); ok := FALSE; ELSE eError := hash.ContainsKey(iKey, xResult => ok); END_IF IF NOT ok THEN pI := __NEW(UINT); iVal := fKey.Create(TO_ULINT(pI)); Service.logger.appendLog(CONCAT('New slave', TO_STRING(uSlave)), 'HashManager', AdvLogType.AdvDebugMsg); hash.AddKeyValuePair(iKey, iVal); appendNewSlave := pI; ELSE eError := hash.GetElementByKey(iKey, itfValue => iElem); xResult := __QUERYINTERFACE(iKey, itfIInstance); IF xResult THEN itfIInstance.Dispose(); END_IF IF eError <> COL.COLLECTION_ERROR.NO_ERROR THEN Service.logger.appendLog(CONCAT('ERROR ', TO_STRING(eError)), 'HashManager', AdvLogType.AdvCriticalMsg); appendNewSlave := nullptr; RETURN; END_IF __QUERYINTERFACE(iElem, iVal); {warning disable C0033} pI := TO___UXINT(iVal.UlintValue); {warning restore C0033} appendNewSlave := pI; END_IF Without the dispose call, every second cold reset crashes immediately when I try to access iVal, even if eError doesn’t report any error. With the dispose call, the cold reset issue disappears, but I get other problems: a) If I start the runtime using systemctl start codesyscontrol, it crashes at IF hash.CountKeys() = 0 THEN b) If I delete the files in PlcLogic and download again, it works and survives multiple cold resets. But as soon as I run systemctl restart codesyscontrol, everything gets corrupted again and it starts crashing at that point. FUNCTION_BLOCK SlaveMapCounter VAR hash : COL.IMap2; eError : COL.COLLECTION_ERROR; END_VAR In its FB_Init I create it: METHOD FB_Init: BOOL VAR_INPUT bInitRetains: BOOL; // TRUE: retain variables are initialized (reset warm / reset cold) bInCopyCode: BOOL; // TRUE: the instance will be copied to the copy code afterward (online change) END_VAR VAR hF : COL.HashTableFactory; END_VAR hash := hF.Create(256); In another FB I instantiate it statically: FUNCTION_BLOCK ABSTRACT AbstractServoEthercatController EXTENDS AbstractServoController VAR_STAT hashSlaves : SlaveMapCounter; END_VAR VAR field : REFERENCE TO ADVAbstractFieldUnitEthercatCia402; initCnt : REFERENCE TO UINT; END_VAR The append method is the one shown above, and I call it after the runtime has started. The accesses are performed by a single task, and in any case I’m working on an isolated single core. I’ve tried everything, moving the create, the instances, and all the rest several times, but nothing seems to work. I’d like to point out that these FBs are part of our own library, which is used in many applications.
Last updated: 2025-09-11

Post by timvh on JSONByteArrayWriter string result incorrect order ^{CODESYS Forge talk (Post)}
See the example below. You can insert key/value pairs as required At first the JSON string will be filled with: "{$"Key1$": $"Value0$", $"Key2$": [{$"Key3$": 1, $"Key4$": 2}]}" With xAdd, you can insert items, which will result in: "{$"Key1$": $"Value0$", $"Key2$": [{$"Key3$": 1, $"Key4$": 2},{$"Key3$": 3, $"Key4$": 4}]}" VAR factory : JSON.JSONDataFactory; eDataFactoryError : FBF.ERROR; pJsonData : POINTER TO JSON.JSONData := factory.Create(eError => eDataFactoryError); fb_JBuilder : JSON.JSONBuilder; wsValue : WSTRING; diRootIndex, diObjectIndex1, diObjectIndex2, diObjectIndex3 : DINT; iValue : INT; jsonArrayWriter : JSON.JSONByteArrayWriter; wsJsonData : WSTRING(1000); xFirst : BOOL := TRUE; xWrite: BOOL; xAdd: BOOL; END_VAR IF xFirst THEN fb_JBuilder.Reset(); fb_JBuilder(pJsonData := pJsonData, diRootObj => diRootIndex); wsValue := "Value0"; fb_JBuilder.SetKeyWithValue("Key1", wsValue, diParentIndex := diRootIndex); diObjectIndex1 := fb_JBuilder.SetKeyWithArray(wsKey := "Key2", diParentIndex := diRootIndex); diObjectIndex2 := fb_JBuilder.SetObject(diParentIndex := diObjectIndex1); iValue := 1; fb_JBuilder.SetKeyWithValue("Key3", iValue, diParentIndex := diObjectIndex2); iValue := 2; fb_JBuilder.SetKeyWithValue("Key4", iValue, diParentIndex := diObjectIndex2); xFirst := FALSE; xWrite := TRUE; END_IF IF xAdd THEN xAdd := FALSE; diObjectIndex3 := fb_JBuilder.SetObject(diParentIndex := diObjectIndex1); iValue := 3; fb_JBuilder.SetKeyWithValue("Key3", iValue, diParentIndex := diObjectIndex3); iValue := 4; fb_JBuilder.SetKeyWithValue("Key4", iValue, diParentIndex := diObjectIndex3); xWrite := TRUE; END_IF IF xWrite THEN xWrite := FALSE; jsonArrayWriter( xExecute := TRUE, wsLinebreak := "", pwData := ADR(wsJsonData), udiSize := SIZEOF(wsJsonData), jsonData := pJsonData^, xAsyncMode := FALSE ); END_IF IF jsonArrayWriter.xDone OR jsonArrayWriter.xError THEN jsonArrayWriter(xExecute := FALSE, pwData := ADR(wsJsonData), udiSize := SIZEOF(wsJsonData), jsonData := pJsonData^, xAsyncMode := FALSE); END_IF
Last updated: 2026-06-14

Post by matthew on Persistence Manager Backup ^{CODESYS Forge talk (Post)}
Hi, Is there a process to restore Persistence Manager files? I have backups of persistence variables used in a machine that is currently operating and tuned and all set points adjusted. There are about 500 persistence variables, they are building another identical machine. I would like to use Persistence Manager files from the first machine in the second also. I have tried copying the files and replacing them on the new RPI but then the Persistence Manager gets errors and then they are all reset to 0 etc I have tried adjusting the times to match. Instead of replacing whole file, I tried just changing the contents inside the file, but still does not work. I may be missing something here, but surely there must be a way to load a backup. Thanks!
Last updated: 2023-10-18

Post by gurke258 on Codesys Safety EtherCAT with Beckhoff ^{CODESYS Forge talk (Post)}
Hello :) We are currently configuring a system with Codesys as SoftPLC on a Linux system and with Beckhoff terminals. I have already gained some experience with Codesys and also with TwinCat incl. TwinCAT Safety. What is new to me now is Codesys in conjunction with Beckhoff safety terminals. We are currently using an EL1918 & EL2904 here. I have been able to integrate both terminals into my project, but I don't know how to interconnect them so that they communicate. That's a bit easier with Twincat ^^ Can any of you help me? I would also prefer a Codesys EtherCAT Safety training or webinar if anyone knows of one. Unfortunately I can't find such an event on the internet.
Last updated: 2023-11-07

Post by bahrt on Mapping GPIO and adding GPIO configurations ^{CODESYS Forge talk (Post)}
Hi I am about to configure ALL GPIOs on a Raspberry Pi 3 model B V1.2. It seems that I have limited understanding of why not all the IO’s become available with the corresponding mapped IO’s – the 'dwInUse' contains mapping of the inputs from GPIO0 to GPIO27. But 'dwInputs' are only showing GPIO0 to GPIO8 and GPIO15 as available inputs. These mentioned inputs work fine You will be able to watch the limited mapped IO activity here: https://drive.google.com/file/d/1zz4PBNBfRZBF2YkiJ2VQxw6L9MBVji7R/view?usp=sharing Can you please bring your best idea on why GPIO09 to GPIO14 and GPIO16 to GPIO27 state are zero in the dwInputs register? Thanks in advance. Best regards Andreas Bahrt
Last updated: 2023-11-16

Post by bahrt on Raspberry Pi GPIO mapping ^{CODESYS Forge talk (Post)}
Hi I am about to configure ALL GPIOs on a Raspberry Pi 3 model B V1.2. It seems that I have limited understanding of why not all the IO’s become available with the corresponding mapped IO’s – the 'dwInUse' contains mapping of the inputs from GPIO0 to GPIO27. But 'dwInputs' are only showing GPIO0 to GPIO8 and GPIO15 as available inputs. These mentioned inputs work fine You will be able to watch the limited mapped IO activity here: https://drive.google.com/file/d/1zz4PBNBfRZBF2YkiJ2VQxw6L9MBVji7R/view?usp=sharing Can you please bring your best idea on why GPIO09 to GPIO14 and GPIO16 to GPIO27 state are not active (at a fixed zero state) in the dwInputs register? Thanks in advance. Best regards Andreas Bahrt
Last updated: 2023-11-21

Post by lukebouchard on NVL generating ADwin packets instead of UDP? ^{CODESYS Forge talk (Post)}
Using Codesys 3.5 SP11 32bit to program a pair of IFM CR711S controllers. They each have an NVL sender and are set up to receive each others messages. One is transmitting properly but not receiving, the other is receiving the first's messages just fine. When I look at the traffic in wireshark, I can see the one transmitting properly as UDP packets on the subnet and port I had specified. The Second is transmitting on the right subnet and port, but is sending 'ADwin Config' packets. Has anyone run into anything simmilar? From some reading on ADwin from google, nothing is enlightening. Both are set up in the same way, have their own ports and List Identifiers. I have deleted the NVL files and regenerated them, cycled power, and even deleted and remade the NVL's so many times.
Last updated: 2024-08-24

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 pierre on difference between stub file and source file in scriptengine ^{CODESYS Forge talk (Post)}
I included the stub files of scriptengine (codesys python api) in a directory scriptengine of a project. I tried to include librarymanager like that: from scriptengine import librarymanager visual studio code detected an error. It said librarmanager could not be found. Indeed in the stub file, this was library_manager. But if I change it in my code, the plugin doesn t work anymore. I found an easy solution to this problem. I ve just changed the copied stub files.(library_manager -> librarymanager) But I think it would be better if you update it yourself in the future.
Last updated: 2024-09-20

Post by pierre on difference between stub file and source file in scriptengine ^{CODESYS Forge talk (Post)}
I included the stub files of scriptengine (codesys python api) in a directory scriptengine of a project. I tried to include librarymanager like that: from scriptengine import librarymanager visual studio code detected an error. It said librarmanager could not be found. Indeed in the stub file, this was library_manager. But if I change it in my code, the plugin doesn t work anymore. I found an easy solution to this problem. I ve just changed the copied stub files.(library_manager -> librarymanager) But I think it would be better if you update it yourself in the future.
Last updated: 2024-09-20

Post by robinluckey on IDE window handling bugs, windows diasppear, multi monitor setups ^{CODESYS Forge talk (Post)}
Codesys Windows (Main window as well as pop-ups) often appear outside of the viewable are in Windows when using multiple Monitors. This is exacerbated (happens more very often), when working on a notebook with different Monitor setups at different locations (which kind of is standard nowadays). The windows (not even the main Window) can not be recovered using standard short cuts like WIN + Arrow keys, alt + tab etc. The only way we found to recover the windows is by changing the Monitor positions in thew Windows Display Settings and than changing them back EVERY TIME a pop us is displayed. This makes using Codesys close to unbearable. All my colleagues face the same problem and do not have this problem with any other IDE. Please help.
Last updated: 2024-10-11

Post by hyys12 on CODESYS 3.5 dicovery of PLC modules ^{CODESYS Forge talk (Post)}
I have a WAGO PLC, to which I am establishing a connection. Here I use the autodiscover to register the connected modules. Now, I have tested the in-/outputs of the different modules, to verify they are consistent with how they are physically connected to the PLC in regards to how CODESYS has numbered them. Will CODESYS always number the modules closest to the PLC itself lowest, and the one furthest away, the highest? I am rather new to the program, so I both hope my question makes sense, as well as not being completely obvious. Thanks!
Last updated: 2024-12-06

Post by askic on Library Documentation Export Error ^{CODESYS Forge talk (Post)}
Hello, I have encountered a very strange and non descriptive error when creating libraries. Basically, when user just create a new CODESYS library, and then just add Text List, save build with no errors and then try to save as compiled library, the following error would be generated: "The library documentation export error" and nothing more, just like shown in the attachment. Of course I have installed package CODESYS Library Documentation Support v 4.6.0.0 I'm Using Codesys 3.5.20 Patch 2 Does anybody have any suggestion about the cause of this error or any advice on how to troubleshoot further?
Last updated: 2025-02-15

Post by george32 on TCP Server ^{CODESYS Forge talk (Post)}
Dear people, I would like to create a TCP server in my PLC program. The TCP server needs to communicate with an external device. I have been searching the internet and found that the libraries Syssocket or CAA NetBaseSrv are two possible solutions to create a TCP server. From what I have read, CAA NetBaseSrv is more user-friendly to implement than the Syssocket variant. However, I am still struggling to actually implement this library. Foremost is my little knowledge about creating a TCP server and how to read/understand each function block, especially the outputs of some blocks and the types, e.g. server has an output CAA.Handle, but I cannot find the explanation of CAA.Handle. I tried to find a good document that can help me understand how to implement a TCP server, but I could not find it. Thank you in advance, George
Last updated: 2025-02-20

Post by peterkcontrols on TargetVisu started in windowed or not full screen ^{CODESYS Forge talk (Post)}
Hello, I am using Codesys on an industrial pc with a single monitor. I would also like to have a separate vision software running on the PC and would like to display it half screen. When I run the soft PLC the my visualization screen appears full screen, I would like to be able to set the size of the visualization screen so I can display other software on the monitor. Is it possible to set the width/height of the targetVisu? Anyone try something similar? I would like to avoid having to put it on a Virtual Machine. Thank you
Last updated: 2025-02-26

Post by trusty-squire on AXIS Rollover ^{CODESYS Forge talk (Post)}
If you mean you want to shift the Origin or Zero position of your axis, you can try MC_SetPosition and set the position to 0 (if you want to take the current active position and make it the new 0. Adjust this number accordingly if/as needed). This means the servo drive keeps it's current origin position, and Codesys applies an offset to the servo drive position in the logic. You can also use the homing function of your servo drive using MC_Home and have your drive configured to set the current position as origin when it receives a homing command.
Last updated: 2025-03-11

Post by bjarne-pagaard on Global Variables ^{CODESYS Forge talk (Post)}
Old thread, I know - but it still has good answers. I would like to add a bit of info to it, as I was having a problem that lead me to this thread, but didn't give an exact answer. I am porting a project to a different PLC architecture. (Wago PFC300) A GVL named 'GVL' in the POUs section of my project was shadowed by a PLC-specific library in the Application->Library Manager. So all the existing references in the device specific code to 'GVL.something' would not resolve. Right-clicking the GVL in the code and 'Go to definition' would point me to the library in the Application Library Manager. All I had to do from there, was right-click the library, and set the property 'Only allow qualified access to all identifiers' in the library.
Last updated: 2025-04-11

Post by ulvis on CFC Pages Cut&Paste is not working at its best ^{CODESYS Forge talk (Post)}
In the CFC page oriendted editor, if I copy some elements consisting of an input connector, some connected logic and an output connector and then paste this on a another page then the pasted elements get inserted with an offset to the right so that the rightmost connector falls outside of the page, in the grey hatched area. So far so good. Then I mark all the elements and try to drag them into the correct placement, collectively. THIS IS NOT POSSIBLE! I only get the "forbidden" icon tooltip. One has to drag & drop the INDIVIDUAL elements to move the elements around. What am I doing wrong?
Last updated: 2025-05-15

Post by ulvis on CFC Pages Cut&Paste is not working at its best ^{CODESYS Forge talk (Post)}
In the CFC page oriendted editor, if I copy some elements consisting of an input connector, some connected logic and an output connector and then paste this on a another page then the pasted elements get inserted with an offset to the right so that the rightmost connector falls outside of the page, in the grey hatched area. So far so good. Then I mark all the elements and try to drag them into the correct placement, collectively. THIS IS NOT POSSIBLE! I only get the "forbidden" icon tooltip. One has to drag & drop the INDIVIDUAL elements to move the elements around. What am I doing wrong?
Last updated: 2025-05-15

Post by ulvis on CFC Pages Cut&Paste is not working at its best ^{CODESYS Forge talk (Post)}
In the CFC page oriendted editor, if I copy some elements consisting of an input connector, some connected logic and an output connector and then paste this on a another page then the pasted elements get inserted with an offset to the right so that the rightmost connector falls outside of the page, in the grey hatched area. So far so good. Then I mark all the elements and try to drag them into the correct placement, collectively. THIS IS NOT POSSIBLE! I only get the "forbidden" icon tooltip. One has to drag & drop the INDIVIDUAL elements to move the elements around. What am I doing wrong?
Last updated: 2025-05-15

Post by ulvis on CFC Cut & Paste not working at its best. ^{CODESYS Forge talk (Post)}
In the CFC page oriendted editor, if I copy some elements consisting of an input connector, some connected logic and an output connector and then paste this on a another page then the pasted elements get inserted with an offset to the right so that the rightmost connector falls outside of the page, in the grey hatched area. So far so good. Then I mark all the elements and try to drag them into the correct placement, collectively. THIS IS NOT POSSIBLE! I only get the "forbidden" icon tooltip. One has to drag & drop the INDIVIDUAL elements to move the elements around. What am I doing wrong?
Last updated: 2025-05-15

Post by tk096 on Max lines of code, codesys CNC ? ^{CODESYS Forge talk (Post)}
Hi, this is a bug in CODESYS Softmotion. Due to this bug the size is limited to a maximum of 32767 elements. However, we recommend to use way smaller buffer sizes. You could use a small buffer (it should be big enough so that it does not run empty when the interpolator processes the elements). In the beginning you fill the buffer in PLC_PRG until it is full. Afterwards, you start the interpolator. The interpolator processes the elements and removes them as soon as it travels past them. In PLC_PRG you check whether new elements can be stored in the buffer (NOT QUEUE.bFull). If the buffer has space, you generate the next elements and add them to the buffer (SMC_AppendObj()). I hope this helps you.
Last updated: 2025-06-04

Post by manuknecht on Using SMC_MOVTYP.INITPOS without specifying the start position ^{CODESYS Forge talk (Post)}
I am using the object SMC_GEOINFO to generate a trajectory and move a system accordingly using the SMC_INTERPOLATOR function block similar to the sample project CNC10_DynamicPath.project. According to the documentation, the movement type INITPOS does not require a start position in the SMC_GEOINFO object, which is confirmed in the documentation of the SMC_GEOINFO object. When using the movement type INITPOS however, the motion will still start from the starting point defined in the SMC_GEOINFO object (0,0,0 if not specified otherwise). Does someone know how to resolve this or is there an example project that makes use of the INITPOS movement type without specifying the starting point? Thanks in advance!
Last updated: 2023-12-15

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