Post by pharus on Setup problems with PiXtend ^{CODESYS Forge talk (Post)}
Hello all, I have an PiXtend V2L complete kit and installed everything like in the manual. Ive installed Codesys V3.5 S20 Codesys Control for Raspberry Pi PiXtend_V2_Professional_for_CODESYS.package But as soon as i Create a Project, i get a lot of error messages, and i cant find the PLC via Ethernet Thanks a lot
Last updated: 2024-06-19

Post by pharus on Setup problems with PiXtend ^{CODESYS Forge talk (Post)}
Hello all, I have an PiXtend V2L complete kit and installed everything like in the manual. Ive installed Codesys V3.5 S20 Codesys Control for Raspberry Pi PiXtend_V2_Professional_for_CODESYS.package But as soon as i Create a Project, i get a lot of error messages, and i cant find the PLC via Ethernet Thanks a lot
Last updated: 2024-06-19

Post by fahrettin on CODESYS 3.5.17.30 Setup Error ^{CODESYS Forge talk (Post)}
While trying to install CODESYS 3.5.17.30 (64-bit) on my Windows 11 computer, I'm getting the errors below. The first error occurs near the end of the installation. Once you bypass it, the installation returns the second error. Do you have any suggestions for a solution? By the way, I've tried this on several PCs, but I haven't found a solution.
Last updated: 2025-10-30

Post by aniket-b on Scara3 kinematic robot error ^{CODESYS Forge talk (Post)}
Thanks Georg for responding. I have followed the suggestion mentioned in the real time problem. However, it does not solve the problem. The weird part is, the robot stops at the same position randomly and it does not stop when I increase the speed of the motion.
Last updated: 2025-12-23

Post by blitz on Can't get SMC_SmoothPath to work ^{CODESYS Forge talk (Post)}
Hi @bertus I have a similar situation: just like in your case I can see that rounding works correctly only for the first element, additionally in my case on a path made of lines where I am testing this every second line is skipped. The interpolator jumps to every second iActObjectSourceNo.
Last updated: 2026-01-07

Post by gatto on EXCEPTION [watchdog] how to find position cause ^{CODESYS Forge talk (Post)}
hi. My plc is weidmuller UC20-WL200-AC, IDE CODESYS 3.5.20.40, see picture for task settings. sometime i've got the plc stop. Reading the log, I find: EXCEPTIONPOSITION : IP=0x(nil) (no IECcontext could be retrieved) component CmpIecTask EXCEPTION [Watchdog] occurred: App=[Application], Task=[TASK_O_MAIN] component CmpIecTask How to find the position of problem?
Last updated: 2026-02-06

Post by gordonkeller360 on Equal Objects at Unstaged Changes - Git (Codesys Pro) ^{CODESYS Forge talk (Post)}
Hi -- curious to know the same thing! Lots of "The objects are equal" randomly popping up... my solution (for now) is simply to commit the actual changes and then execute the rollback (git clean + checkout) on all that are giving me the issue in question. Does anyone know if this repairable?
Last updated: 2026-05-14

Post by risele on dynamic modbus devices ^{CODESYS Forge talk (Post)}
Have the same issue: I'm making a test setup for modbus devices testing and calibration. One is run for every possible address, and it starts with minimal request: if the device is found, it continue to work with it, otherwise it's set to Disabled temporary. Those state machines are running under FOR cycle, and disabled are just skipped. Every instance have its own timer for not running too frequently and a start delay, so the actual requests are separate in time. I also check not for a single error, but have some timer to allow one-two timeouts. The small program disables and re-enables devices temporary (manually, since i could not iterate over MB devices). VAR Reset:ARRAY[1..GVL_MB.MD_COUNT] OF R_TRIG; i:INT; END_VAR {IF hasconstantvalue(GVL_MB.MD_COUNT, 1, >= )} i:=1; MD_1.Enable:=GVL_MB.MDPortsEnable[i]; Reset[i](CLK:=GVL_MB.MDPortsEnable[i]); MD_1.xReset:=Reset[i].Q; {END_IF} {IF hasconstantvalue(GVL_MB.MD_COUNT, 2, >= )} i:=2; MD_2.Enable:=GVL_MB.MDPortsEnable[i]; Reset[i](CLK:=GVL_MB.MDPortsEnable[i]); MD_2.xReset:=Reset[i].Q; {END_IF} There is also program to re-enable devices periodically. METHOD ScanBus VAR_INPUT END_VAR VAR j:INT; (*block auto scanning if calibration is running for any device since it's data-reach process that should not be interrupted with modbus timeouts *) CalibrationBusy:BOOL:=FALSE; END_VAR CalibrationBusy:=FALSE; FOR j:=1 TO GVL_MB.MD_COUNT DO CalibrationBusy:=CalibrationBusy OR MD_Calibrate.AutoTesters[j].xBusy; END_FOR; IF CalibrationBusy THEN RETURN; END_IF tBusScanSchedule(IN:=(NOT tBusScanSchedule.Q), PT:=tBusScanPeriod); IF (NOT tBusScanDelayer.Q) AND (tBusScanSchedule.Q OR (NOT xFirstScanPerforemed)) THEN xBusScanBusy:=TRUE; MissingCounter:=0; xFirstScanPerforemed:=TRUE; FOR j:=1 TO GVL_MB.MD_COUNT DO (* MD_Calibrate is main calibration program. Identifiers - is array of State machines mentioned above Phase_Faulted is a state of Identifiers where I'm sure device is missing on the bus *) IF MD_Calibrate.Identifiers[j].state=eStateMDIdentifier.Phase_Faulted THEN MD_Calibrate.Identifiers[j].Rescan(); MissingCounter:=MissingCounter+1; END_IF END_FOR END_IF tBusScanPauser(IN:=tBusScanDelayer.Q AND (MissingCounter>0),PT:=tBusScanDelay*MissingCounter); xBusScanBusy:=tBusScanPauser.Q; xFirstScanPerforemed:=xFirstScanPerforemed OR tBusScanPauser.ET>=tBusScanPauser.PT; Also the GUI have buttons for each address possible that re-enables the device if required.
Last updated: 2026-02-13

Post by hclai on Maximum Array Index Issue ^{CODESYS Forge talk (Post)}
I was trying to use a table object in visualization. I want to dynamically show the valid rows in the table. However, it does not work when there is 1 row. i put the maximum array index to 1. it does not show the 1st row. when i change to 2, it show the second row only. my project with older visualization profile version is working perfectly fine. I did some test and realized that i must use a Row Selection variable to change from 0 to 1. With this change of Row selection, then the row 1 will show up.
Last updated: 2025-06-19

Post by matthew on New Ladder Diagram conversion does not work due to missing features ^{CODESYS Forge talk (Post)}
Hi It looks like in the new ladder there is no way to remove unused FB call parameters or update the function block? It's quite often where you have a function block with multiple uses and not all the parameters are required. Need the ability to leave an input/output blank without getting an compile error Expression expected instead of '' Also double clicking on the FB no longer opens the underlying FB code and view what it was doing online. Dragging and dropping a variable does not work, only using the selection works. Will these be available in the V1.0 release or just best to stick to the old ladder until it's available? Thanks
Last updated: 2024-01-28

Post by struccc on Release SP20 - Changes in behaviour? ^{CODESYS Forge talk (Post)}
Dear all, I've just started to migrate some of my ancient projects to SP20. There is one strange error (?) I have noticed so far. In a method call, depending on the circumstances I would like to return reference to an object, or an invalid reference: METHOD Add_EVT_OUT : REFERENCE TO FB_MSG VAR END_VAR IF __ISVALIDREF(refMSG_Entry) THEN Add_EVT_OUT REF= MANAGER.AddMsg_EVT_OUT( refMSG_Entry, _Get_EVT_Message(MSG_EVENT.OUT), _Get_EVT_AddCode(MSG_EVENT.OUT) )^; ELSE Add_EVT_OUT := 0; END_IF So far setting a reference variable to 0, did this. But now, the expression Add_EVT_OUT := 0; gives an error: [ERROR] DB_WTP_370: Add_EVT_ACK MSG_TRIGGER_EXT: C0032: Cannot convert type 'BIT' to type 'REFERENCE TO FB_MSG' Naturally... I can write: Add_EVT_OUT := DWORD#0; But is this the correct way? Is there any constant I could use instead, like "NULL"? Or this is totally wrong and to be avoided?
Last updated: 2024-03-24

Post by andrej on Threads and TID created by CODESYSControl Win V3 ^{CODESYS Forge talk (Post)}
Hi all, for a deeper understanding of the Codesys RTE - I created a simple application with 3 IEC tasks (Ta,Tb,Tc) each with different priorities, and different cycle times. The application runs on Windows 10 in the Soft PLC CODESYS Control Win V3. If my understanding is correct, the RTE i.e. the Process CodesysControlService should spawn 3 threads (Th_a,Th_b,Th_c) which are executed with the defined cycle times, the priority of the threads should reflect the priority of the task set in the Codesys IDE. Does somebody have an idea, how I could identify the respective threads in Windows? Kind regards Andrej
Last updated: 2023-10-02

Post by ivanj on Codesys V3 + Rpi + PCA9685 + two robot arms ^{CODESYS Forge talk (Post)}
greetings to everyone I have a system consisting of rpi3 computer with codesys v3 installed connected to one pca9685 through which the servo motors of the two robotic arms are connected (each robot arm has 6 motors) I managed to get that the pca9685 can only drive 4 servos on the first arm the other 2 on the same robot arm do not respond, nor do the remaining 6 they do not react on the other robotic arm. Power is connected to the pca9685 for motors of sufficient power or amperage. I tried to put another pca9685 but the same thing happens again. What is the possible problem?
Last updated: 2024-10-02

Post by matthew on High resolution displays with 150% scaling causes CodeSys IDE to be blurry ^{CODESYS Forge talk (Post)}
I have just upgraded my laptop which has a high res display 2560x1600 and I have to have scaling switch on at 150% but everything looks blurry and not crisp, It seems CodeSys IDE is the only software on my system to look this bad, if I switch to 100% it's crisp but way to small. From a bit of research this could be due to the use of old windows forms or something? I have found a temp workaround that sort of works but not great. You have to run CodeSys in compatibility mode and adjust the DPI settings, this works ok and the editor is clear and crisp again but the actual tool bars are small like running at 100% Anyone got any tips for running CodeSys on high res displays with scaling?
Last updated: 2025-03-03

Post by budd7566 on Text size suddenly changed ^{CODESYS Forge talk (Post)}
Iv been working with a Deep Sea Electronics DSE840 for about 6 months. I have a development version of my program working with a state machine and a basic gui interface. I went to implement CAN and suddenly the text on the gui on the controller is much larger than before. I could flash old versions of my project and the text was the correct size, but if i renamed the project file, the text displayed would be large. The visualization in CODESYS always shows the expected size, but not the controller. I did a fresh install of CODESYS and even a new project with only one text box, I cant get the text size on the controller to match what is displayed in codesys to match. Any advice?
Last updated: 2023-12-09

Post by vformanek on irq-set piority is not working in plc-shell ^{CODESYS Forge talk (Post)}
Hello, I am currently having issues on CODESYS Control for linux SL with DTH expiring. I have followed several tutorials of creating a proper RT linux. Then I further configured the linux based on this tutorial: https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_performance_optimization.html Currently I am getting DHT expires in the communication and I am trying to increase of the priority of the network task which manages the PROFINET network adapter. I am following this tutorial: https://content.helpme-codesys.com/en/CODESYS%20PROFINET/_pnio_trouble_connection_failure.html But the irq-set is not changing the priority. See the image bellow....
Last updated: 2024-01-05

Post by anderson on function block output ^{CODESYS Forge talk (Post)}
I'm trying to make a CNC machine, but I'm having problems because the drive I'm using only has the option of communicating through digital inputs. In this case, I should use the CLP's digital outputs to communicate with it, correct? However, in the function blocks it seems that they are already pre-programmed and I didn't find the pulse output options, for example, so that I could associate a digital output from the PLC to connect this to the drive's pulse input. My question is: is it possible to associate the pulse output of the function block with a digital output of the PLC? and how to do this?
Last updated: 2024-01-05

Post by toby on Ethercat Servo Setup ^{CODESYS Forge talk (Post)}
Hi everyone, so a little update to this, I've come back to this project in the new year, and got it working. Yeah!, However, now with the new licensing setup, I need a new SoftMotion license, but it doesn't seem to be compatible with the previous Raspberry Pi SL license. Has anyone had any luck with Raspberry Pi and SoftMotion_Lite? Specifically the licensing of such? My customers new installation needs to be rebooted every 30min which is causing headaches! Another option is to not use the SoftMotion function blocks, and control the EtherCat amplifier directly, but I'm not sure how to do so. Does anyone have a specific example project of how to control a servo without the use of the SoftMotion function blocks? Thanks everyone for any assistance rendered. It's very much appreciated! Toby
Last updated: 2024-01-10

Post by mp9876 on Device logon problem following fresh install ^{CODESYS Forge talk (Post)}
Yes it had been the case I believe as I have seen that message regarding they were not the same. I had update the device though to match them and that still did not fix the problem. I gotta say I wanted to get out of that situation and attempted a lot of things and then I did two things at the same time that fixed my problem: Wiped the 64 bit version and installed the 32 bit version Installed latest SP20 I wish I knew which one of these actions fixed the problem but now I gotta catch up on this IDE learning; it's been quite a learning experience I have to say! Thank you very much for your time and advice; much appreciated!
Last updated: 2024-03-19

Post by fajean on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge talk (Post)}
4.11 appears to solve the problem. Thanks for your help. I had first installed the 64-bit version of RPiOS, but looking at various posts and the product's page on the store which only lists 32-bit compatibility, I downgraded to the 32-bit version. I did this before trying 4.11, and it did not solve the problem. Thus my working system is 32-bit, and I am wondering if I can go back to 64-bit or not. An 64-bit OS is not listed as compatible on the store's web page, but when installing there actually is a 64-bit version listed (automatically chosen when installing on 64-bit, but otherwise greyed out). Is 64-bit supported and the website is out-of-date, or is that some kind of work-in-progress?
Last updated: 2024-06-13

Post by user3000 on Can't find an Extended Pulse Timer (TP and LTP) ^{CODESYS Forge talk (Post)}
Hello, For my program I need an extended pulse timer, which can be referred to as a retriggerable pulse timer. Where every rising edge of the input resets the elapsed time zero, extending the lenght of the output pulse. The Codesys pulse timer (TP) is a one-shot timer and only resets the elapsed time with the falling edge of the input. There is also a pulse timer (LTP) in codesys, but in my simulation it was also functioning as a one-shot even though the description sounds like LTP should be retriggerable. I have uploaded some timing plots from another PLC program for reference. I am looking for a timer equivalent to the "TEP" diagram. Is there an Extended Pulse Timer in Codesys? Maybe there is a way to manipulate the input so it resets the elapsed time outside the function block?
Last updated: 2023-12-06

Post by hyys12 on Help understanding analog in-/outputs ^{CODESYS Forge talk (Post)}
Hello. I am currently working on a WAGO PLC, where I am trying to wrap my head around how the analog inputs and outputs work in codesys. I have looked far and wide on the internet, for a general introduction to the whole concept, but I have not had any luck with finding anything that helped me understand it better. The whole goal is for me to be able to read an analog input from a temperature sensor, as well as using an analog output, to control a frequency inverter. I know these have nothing to do with each other, but that is all I have on hand right now. I am trying to program this using Ladder Diagram. The only thing is, that every video/guide I have seen/read using LD, just adds a whole lot of function blocks, to do all kinds of stuff they don't explain. My general question is, how would one go ahead and read the analog input, as well as transmit an analog output? Is there some kind of specific function block I would have to use for this, or some great video I can watch, to understand the inner workings. Is it somehow possible to see the values the PLC recieved/sends? Regards.
Last updated: 2024-12-11

Post by forest on SM Drive license error ^{CODESYS Forge talk (Post)}
Hi, when it comes about license, I used INVTmatic Studio, which uses Codesys, for programming INVT plc. I bought Codesys Modbus license, it was not expensive, and then realised that INVT didn't have License Manager option (greyed out in program) which is needed for using of Codesys License. I contacted support from INVT, but developers told me that option is still not available. So depending on environment for programming Codesys, you can or not use Modbus license. Good thing about this version of Modbus TCP it works both direction. I could send commands and receive feedbacks from drive. But communication stops after 30 mins. So I used simple version of ethernet modbus which is somewhere in INVT or Condesys library (I can check tomorrow) which works only one way. I could send cmd to drive, and control it, but didn't have any feedback, like some readings back in PLC. which is bad, but at least I could start it and it didn't fail after 30 mins.
Last updated: 2024-01-10

Post by chalk on No source code available ^{CODESYS Forge talk (Post)}
Hello, This is my first time using Codesys, I am trying to add EtherNetIP communication to a Raspberry PI. I’ve added the EtherNetIP Adapter configured the network setting and added some modules to the pi but when I download the project it generates the following error: “There is no source code available for the object because it is in the compiled library ‘cip object, 4.5.1.0 (3s – smart software solution gmbh)’. Do you want to browse for the original library in order to display the source code? There are 2 errors in the log which are: SOURCEPOSITION App=[Application] area=3, offset=332760 EXCEPTION [Application] occurred: App=[Application], Task=[ENIPAdapterServiceTask] I can’t for the life of me work out how to get around this. I can’t find the source code anywhere or any information regarding this error. I’m using Codesys V3.5 SP19 Patch 3, the version of the Ethernet adapter is 4.5.1.0 and the version of the modules is 4.1.0.0. Any help on this will be greatly appreciated. Thanks
Last updated: 2024-02-02

Post by zoronoa on J1939.ReceiveWatchdog & J1939.ReceiveParameterGroup ^{CODESYS Forge talk (Post)}
Hi, I'm trying to monitor a specific PGN which I have it sending a pulse every 500mS Problem: Using the Watchdog for the ECU does not really help me as I have multiple instances with separate PGNs, if a PGN goes ghost, the ECU watchdog won't be flagged as the others will be running. I found the J1939.ReceiveWatchdog & J1939.ReceiveParameterGroup function blocks and they seem like a good solution for my problem, I just can't get them to work from my understanding you just build the J1939.ReceiveParameterGroup once and then connect it's output to the J1939.ReceiveWatchdog, here's my CODE for the setup HEARTBEAT_TIMER(IN:= TRUE, PT:= T#1000MS); //turn-on delay because of initialization race IF HEARTBEAT_TIMER.Q= TRUE THEN Glob_Var.DisplayReceive.xExecute:= TRUE; Glob_Var.DisplayReceive.itfECU:= Valve_X; Glob_Var.DisplayReceive.dwPGN:= 65511; Glob_Var.DisplayWatchdog.xEnable:= TRUE; Glob_Var.DisplayWatchdog.itfParameterGroup:= Glob_Var.DisplayReceive.itfParameterGroup; Glob_Var.DisplayWatchdog.tTimeout:= T#1500MS; END_IF Notes: Glob_Var.DisplayReceive is of type J1939.ReceiveParameterGroup Glob_Var.DisplayWatchdog is of type J1939.ReceiveWatchdog The above code is done once and not cyclically I'm monitoring Glob_Var.DisplayWatchdog.xError cyclically
Last updated: 2024-03-13

Sort by relevance or date