Post by lraja on Codesys Programming with phyBOARD®-Pollux i.MX8M Plus ^{CODESYS Forge talk (Post)}
Dear All, I am trying to Developing a PLC using phyBOARD®-Pollux i.MX 8M Plus. It is very difficult to find the suitable Codesys control for i.MX8M. I have tried to install CODESYS Control for Linux ARM SL , but unable install it and I am getting the following error, [INFORMATION] Executing SSH command on root@192.168.0.10: Retrieving architecture from package management [ERROR] Expected exit value of command failed: expected 0, received 127 [INFORMATION] Standard output: sh: line 1: dpkg: command not found Kindly check and help phyBOARD®-Pollux i.MX 8M Plus Link : https://www.phytec.eu/en/produkte/single-board-computer/phyboard-pollux/
Last updated: 2023-09-23

Post by pascaljt on Function block for Ethernet/IP ^{CODESYS Forge talk (Post)}
Hello, I program a function for an Ethernet/IP controller. I made a structure with input and output corresponding with the map of my controller for the function block. My problem is that I don't know how to do the link between the controller and my PLC (CC 100 from Wago). The addresses declare in Codesys are illogic, The first addresses are 12 and 13 then 7 then 4. How to do corresponding the addresses of the controller and the input / output structure ? IP adress ? Does I must create the all variables of controller with the controller adresses to use with the function block ? Thanks for your help. (I hope I'm clear, I'm not english)
Last updated: 2023-10-26

Post by macros8 on Alarm Management - latched variable represented as Text list ^{CODESYS Forge talk (Post)}
Hi, I haven´t noticed you put the comment here. I thing it´s a bit different. What I want is to have detail errors of technology in data type e.g. INT. This variable I would latch to the corresponding error msg but I would like to get it convert to text from the text list and not keep it in INT form. Example. Main error Valve Error: SubErrors 1 - Both sensors 2 - Not retracted in time 3 - Not pulled out in time In HMI Main error + latch SubErrors => "Valve Error: Both sensors" The benefit is that text lists are part of translation and can be easily manipulated. I know I can create whole string msg in PLC but then, it lose advantage of Alarm management. Thanks. M.
Last updated: 2023-11-07

Post by expertplas on No connection to opc server from codesys opc client ^{CODESYS Forge talk (Post)}
Hello, we have aproblen to connect our CODESYS OPC Client to the OPC Server. We installed the client according the CODESYS manual. We can browse the server and variables can be linked to the PLC. I created a self signed certificate for the CmpOPCUAClent as described. The server has a cerificate also. I copied the certificates to the trusted zone of server and client. But when it comes to data exchange we get an error message. "Communication error in data source OPC UA Library. Error ID : 7001 German : "Kommunikatinsfehler inder Datenquelle OPC UA -Bibiothek. Es wurde kein genauer Fehler angegeben. Fehler ID : 7001" It semms that there is no cerificate exchange. We are working with CODESYS 3.5 SP19 Patch 5. Can anyone here say something about this error or has an idea for a solution? Thanks.
Last updated: 2024-08-19

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 fedex03 on Read Global Variable from an IoT Device ^{CODESYS Forge talk (Post)}
Hello everyone, I am new to the forum, and to programming with CodeSys. I am dealing with IoT device for industry and I should check if a device is able to read/write global variables in an EtherNet/IP Master. Since I do not have an EtherNet/IP PLC, I thought of using CodeSys as a softPLC. I created a program with a set of global variables (GVL) and a task that increments them. I would like to know if I need to enable any options so that the global variables can be read by IoT devices. My device supports Class 2 Class (Explicit Messaging Connection) communication. Thank you in advance for your help.
Last updated: 2025-07-22

Post by niloufar on Execution Order of Function Blocks ^{CODESYS Forge talk (Post)}
Hi, Our program incorporates various function blocks and programs written in different languages such as St and SFC. They implement numerous actions and methods using different languages from their function blocks. My question is whether the execution order of function blocks is associated with the programming languages used. I understand that cycle time can be configured in the task configuration, but I'm curious if there is a specific sequence order of execution for function blocks written in different languages. For example, all function blocks in (ST) are executed first, followed by the execution of (SFC). Specifically, when the function is written in (ST) and the action is implemented in (SFC). I modified all function blocks in the main PLC program and configured a task configuration for the main program.
Last updated: 2023-12-13

Post by ewi04 on How to upload application file to remote controller (offline) ? ^{CODESYS Forge talk (Post)}
Thank you very much for your time and replay! Sounds like a good idea. Unfortunately, I have no other option to run the code from the running plc. So, I can’t stop any services. If anyone has the same problem, I've gotten a little closer to understanding it: Sometimes the copied files are empty after the restart. The update code checks if there are any empty files. Before I turn off the device, everything is okay. But after starting, some files are suddenly empty and that cause the problems. I don't know why this happens.
Last updated: 2024-02-16

Post by dhumphries on Not able to see input data coming from eip adapter on codesys ^{CODESYS Forge talk (Post)}
Does the device have a green icon next to it when the PLC is running? If not you have some kind of communication problem, wireshark may be picking up some data but the scanner may not be configured correctly to receive the data. Check the T>O and O>T bytes and make sure they match on both the scanner and adapter. I've had very little success loading a .eds file and having the configuration work without some manual configuration. If you have a green icon, have you enabled the device to always update variables?
Last updated: 2024-03-02

Post by garrian on How to sort JSON object in codesys ^{CODESYS Forge talk (Post)}
Hi there, I'm testing out MQTT from my Wago PLC using JSON object. I have managed to publish this {"Temperature":15.6,"Setpoint":38.0} to my broker. Now I', trying to subscribe to the same message. The result is this: '{"Temperature":15.6,"Setpoint":38.0}95}ê$10šå$04$Nå$08²Ÿå$0B` á$08@šå' First, why do I see 95}ê$10šå$04$Nå$08²Ÿå$0B` á$08@šå' at the end of the message? Second, how Can i sort out this data to use it in my program? I followed a youtube tutorial which gave me the attached result, which works. But I need some other smart way of doing this when the object gets even more data in it. Any help is very appreciated :)
Last updated: 2024-05-04

Post by fugtwad on Automation Builder V2.5 EtherCAT CM579 Master Scan for devices - >No gateway selected ^{CODESYS Forge talk (Post)}
ABB Automation Builder v2.5.0.22 Premium CodeSys 2.3.9.62 Running on Win 10 VM x64 Goal: I have an EtherCAT topology issue which normally a "Scan for devices.." on the EtherCAT master would shed some light on. Issue: Upon trying such I get a "No gateway selected" error. Question: How might I point the the "scanner" at a gateway? What is working: Gateway is running in system tray. I can go online to PLC. A scan from the "Diagnostics live" tab of the EtherCAT master gives slave status. What I have tried: Restarting gateway in system tray. Exiting system tray gateway and reloading it. Turning off firewall. Contacting ABB support multiple times. Any help appreciated.
Last updated: 2024-05-20

Post by robpqs on Program from one PLC to other WAGO 750-8204 ^{CODESYS Forge talk (Post)}
Hello, You use the WAGOUpload tool. You can download it on the download center of WAGO. Make a backup and restore it on the new device. (if can check the remanent data to copy the persistent variables if necessary) You can also use a SD card, go to the WBM copy it the image to the SD card and restart the other controller on the SD card. In the WBM, copy it back to the internal flash. If you contact your local Wago office, they will more than probably help you. There is also a WAGO forum. RP,
Last updated: 2024-05-27

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by salvadegianluca on SysPlcCtrl23 and C0338: The library 'cmperrors interfaces, 3.5.5.0 (system)' is supported just in 32 bit applications ^{CODESYS Forge talk (Post)}
Good afternoon to everyone; I'm stuck with this error and I don't know how to get out from it... I tried several time googling for alternative systems to control the PLC applications and resets but without success. I would like to realize the possibility to reset the CPU and to start/stop the applications as it was possible with the SysPlcCtrl23, but this library is no longer supported in 64 bit systems and it seems due to the cmperrors interfaces sub library that was included in the above said one. Someone found a work around for this issue?
Last updated: 2024-06-14

Post by gseidel on Can't get SMC_SmoothPath to work ^{CODESYS Forge talk (Post)}
Hi bertus, I cannot see any problem in the code you posted. Just some ideas: What is the value of D_ANGLE_TOL? - Do you need the assignment bAbort := NOT bDecoder? Does it help to leave it out? Any errors (e.g. SMC_SmoothPath.Error/ErrorID) or PLC log messages? What if you comment out SMC_SmoothMerge and SMC_LimtiDynamics, is corner smoothing still not working? Is bDecode written from a different task (e.g. visu)? Then I would recommend to assign to a local variable (bDecodeLocal := bDecode) and use that for all FBs. Otherwise, FBs might see different values of bDecode in a single cycle, which will cause problems. Regards, Georg
Last updated: 2025-12-17

Post by wistaro on Hardware compatibility with Linux RealTime PLC ^{CODESYS Forge talk (Post)}
Hello, I am currently using Codesys Control RTE Softmotion V3 to control my servo-drives in CAN, EtherCAT and PROFINET IRT. I am using a PC with Windows 10 with the following boards: - PEAK-CAN PCIe board (for CAN and Softmotion); - Hilscher CifX with firmware 3.X and SysDrv3s driver (for PROFINET IRT); - Realteak standard NIC (for EtherCAT). I would like to switch to Linux (Debian), because this computer is old, slow, and outdated (Windows 11 is far from being compatible with this computer). Before doing this, I would like to be sure of the compatility between my 3 boards and Codesys Control Linux SL. Otherwize, I will stay on Windows 10 and use it in an isolated environnement. Thanks for your advices. Regards,
Last updated: 2026-06-15

Post by pernockham on Gateway in China - "Gateway not connected" ^{CODESYS Forge talk (Post)}
I think I understand my problem. They are most probably related to configuration of the network. When I use DHCP for the unit to my router it all works. However when using static IP I have not managed to reach functioning state. Trying to replicate the situation on my desk. Having a static IP on the "debian host" and a connection to my computer which then routes traffic on to internet. I have entered settings for gateway and netmask. I can ping from my "debian plc host" to internet and also do "curl google.com" so traffic seems to find its way through and back, still "Automation server" will not find the gateway. Any hints how a manual configuration should be done? Is it possibly a "firewall" issue of my "normal router"? Thanks for any help! Per
Last updated: 2026-01-27

Post by ophelia on Phantom Test Slot Preventing Suite Completion ^{CODESYS Forge talk (Post)}
Hi all, I'm working with a CODESYS 3.5 unit test framework on an embedded Linux PLC and running into an issue where a phantom test slot appears in the results that never completes, preventing the full test suite from ever finishing. The symptom: A blank-named test entry appears in the results table with an ever-increasing action count. It stays as "Testing" or "Failing" indefinitely. Because it never closes, bAllFinished never goes TRUE and the final report is never generated. Question: Has anyone seen this kind of phantom slot issue in a CODESYS unit testing setup? Thanks
Last updated: 13 hours ago

Post by madskaizer on Task Priority Documentation? ^{CODESYS Forge talk (Post)}
Hi All I was watching the Wago PFC300 webinar ( https://www.wago.com/global/lp-thank-you-onlineseminar-pfc-300 ), and the presenters comment about priority 1 being way above the Ethernet task priority, so that a priority 1 PLC program can actually loose SCADA connection, made me try to round up some hard evidence on Codesys Priorities. I find there is very little information on "correct" task priority configuration. There is a lot of different hardware manufacturers, using Codesys Runtime, that has different descriptions in their manuals on how to set up priority. https://doku.amk-motion.com/en/Subsystems/PDK_202975_A-Serie_en/Content/Projekt/AMKAMAC/PDK_202975_A4-A5_Produktbeschreibung/Funktionalitaet/PLC-Programming/PLC%20Tasks.htm?TocPath=PLC-Programming%7C_____7 https://product-help.schneider-electric.com/Machine%20Expert/V1.1/en/SoMProg/index.htm?#t=SoMProg%2FTask_Editor%2FTask_Editor-7.htm&rhsearch=priority&rhhlterm=priority&rhsyns=%20&SUBSTRSRCH=1 https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_f_task_configuration.html So my questions :) 1) If there is only 1 PLC_PRG task, does priority matter? 2) What is the priority of Ethernet / communication, if nothing is entered? 3) What is the priority of Codesys OPC UA server? 4) Some users here on forge mentions that Wago PLC programs should run as priority 11, but where does this recommendation origin from? 5) What are you recommendations for a relatively slow process, like building automation? It uses OPC UA for communication to SCADA, maybe some MODBUS-RTU and MODBUS-TCP, usually around 100 I/O, been running with everything in a single task at priority 1, 50-100ms cycle time. Some controllers have separate MODBUS tasks, but doesn't seem like a big difference. How would you recommend splitting up communication, IO fieldbus and programs into differently prioritized tasks? I know its a complex matter and all about my application, but I really miss there was just some kind of guidance in the documentations and with all new standard Codesys programs having priority 1 as default, makes it seem less important, than it really is.
Last updated: 2025-08-11

Post by mozed on Connection to device closed ^{CODESYS Forge talk (Post)}
Hello I am using an OpusA3 with version 3.5 SP17 Patch 3 as part of a project. I had no real problem before I encountered a problem that blocked me. The detection of the OpusA3 from Codesys is done correctly. The gateway is well configured and if I ping the gateway or the OpusA3 I receive the response correctly. The problem is that when I try to connect, the Opus screen freezes and a few moments later Codesys displays an error message ("connection to device closed"). I tried to change PC, to update the runtime, to change OpusA3 but the problem remains the same. I'm a little lost knowing that before it worked without problem. I went back to a previous version of the project (where it worked correctly) but the message still appears. Do you have any clues to solve the problem? Sincerely,
Last updated: 2023-08-23

Post by caliberbishop on Having trouble using the Web Client SL library ^{CODESYS Forge talk (Post)}
Hello, I'm trying to use the Web Client SL library, I installed it in the IDE (did not purchase a license yet, as this is still a proof of concept so demo mode is good enough) and added it to the library manager. However, when trying to define a FB of the type WebClient I get a "Identifier 'WebClient' not defined" error message, setting the type to Web_Client_SL.WebClient did not work as well. Opening the example project the FBs defined there give the same error message. From the problem in the example project I deduce this is not a syntax problem, so maybe a license problem, but there should be a working demo mode, so what am I missing? IDE v 3.5.21.30 Library v 1.12.0.0 Thanks
Last updated: 2025-10-04

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