Post by alex00 on DCS / Central Engineering with Codesys support ^{CODESYS Forge talk (Post)}
Hello together I'm currently investing in possibilities to have a central engineering software / system for Codesys based controllers. Something like a DCS / SCADA depending on where you see the functionality. We plan to use more or less vanilla codesys. The tool should support the following: - Connect to multiple PLC's in a project to see its variables and debug it. - Central Engineering capabilities (for example shared libraries in a project). - Download the new code / binaries to the plc. - Maybe have functionality to combine visualization elements and logic together. - See the live status variables on all the systems (crosscommunication). I see that codesys theoretically supports engineering of multiple PLC's, but I couldnt find to much functionality for a DCS type of operation, but that could be lack of knowledge. Any tips from you? Is Codesys good enough for this and maybe there are some manufacturers which build around it? Or are there good tools on the market with Codesys support (and the engineering is separate, but download to codesys possible). The use case is distributed energy installations like Heating pumps, Photovoltaics, etc. All these installations should have a PLC with codesys installed and run in one larger network, the PLC's are connected via VPN. Thanks for your inputs Greetings
Last updated: 2024-02-19

Post by alex00 on DCS / Central Engineering for Codesys ^{CODESYS Forge talk (Post)}
Hello together I'm currently investing in possibilities to have a central engineering software / system for Codesys based controllers. Something like a DCS / SCADA depending on where you see the functionality. We plan to use more or less vanilla codesys. The tool should support the following: - Connect to multiple PLC's in a project to see its variables and debug it. - Central Engineering capabilities (for example shared libraries in a project). - Download the new code / binaries to the plc. - Maybe have functionality to combine visualization elements and logic together. - See the live status variables on all the systems (crosscommunication). I see that codesys theoretically supports engineering of multiple PLC's, but I couldnt find to much functionality for a DCS type of operation, but that could be lack of knowledge. Any tips from you? Is Codesys good enough for this and maybe there are some manufacturers which build around it? Or are there good tools on the market with Codesys support (and the engineering is separate, but download to codesys possible). The use case is distributed energy installations like Heating pumps, Photovoltaics, etc. All these installations should have a PLC with codesys installed and run in one larger network, the PLC's are connected via VPN. Thanks for your inputs Greetings
Last updated: 2024-02-19

Post by gurke258 on EL2911 ^{CODESYS Forge talk (Post)}
Hello, sorry to open this again. I can't find the right ESI for EL1918 as Safety PLC.. I only have the one without safety PLC. I look on Beckhoff website but i didnt found it. Can anyone help me? EDIT: I found it :)
Last updated: 2023-10-12

Post by ralfki on PLC shell ^{CODESYS Forge talk (Post)}
Hello together, hopefully somebody could help me. I wanted to import a certificate to trusted folder using the plc shell (cert-import). Does somebody know how I can do it with the library CmpPLCShell Thank you for your support.
Last updated: 2024-11-20

Post by bingo on PLC Shell commands via ST Code ^{CODESYS Forge talk (Post)}
For a permanent change, you may need to update the PLC configuration file or set the IP at startup using retained variables.
Last updated: 2025-03-02

Post by milan-svarny on Redundancy problem - primary PLC suddenly goes to simulation state ^{CODESYS Forge talk (Post)}
Hi Ivanmaltar, please , did you solve the problem? i have the same case. Second PLC is going suddenly to Sim. state Thank you
Last updated: 2025-06-18

SP16 P5. Does not open the pop-up window from option "Update device" (main PLC) and "add device) Ethernet device or CAN device ^{CODESYS Forge talk (Thread)}
SP16 P5. Does not open the pop-up window from option "Update device" (main PLC) and "add device) Ethernet device or CAN device
Last updated: 2023-06-29

ac_persistence not working when creating a Boot Application but works with a Direct Download to the PLC ^{CODESYS Forge talk (Thread)}
ac_persistence not working when creating a Boot Application but works with a Direct Download to the PLC
Last updated: 2024-02-27

Post by jmfernandes on OpenDir always in error ^{CODESYS Forge talk (Post)}
Hello I'm trying to use DirOpen to access a directory where then I can read/list the files inside. But I can't list any files because DirOpen.xError is always true. In eError the message is this: " ERROR_UNKNOWN Local library error ID (0: no error; 5101: time out)**** " I have in the file explorer the path 'C:\CodesysTest\Aluminium' and to make sure I also created in the plc a folder to 'prj/Recipes/Aluminium'. I tried using the different paths, but in both it happens the same thing.Inside the folder Aluminium there is two csv files, that I want to list. I added in the library manager CAA Files and CAA Types. I am using the example of https://content.helpme-codesys.com/en/libs/CAA%20File/Current/Examples.html#directory but not matter what I do, I can't get the list the names of the files. What am I missing?
Last updated: 2024-07-31

Post by pjoret on IFM CR711S Can Low Level Library Use ^{CODESYS Forge talk (Post)}
Hello, I'm using CR711S from IFM and I would like to use the CAA Can Low Level in de Safety part. I already use it on the Standard part and it works properly. I would like to know if there is some restriction on using it on the safepart of the PLC (I tried but my PCL put himself in Stop...) ? And if you have some example or even a forum with some types on IFM and CoDeSys, I would Take It. Have a nice Day.
Last updated: 2024-04-03

Post by nz-dave on *exception* [processorloadwatchdog] occurred in: app=[all], task=[all] ^{CODESYS Forge talk (Post)}
Can anyone shed some light on this issue im having. at random, sometimes days, sometimes weeks or months. i get this error and have to reset the plc. Im using a Weintek HMI with ethernet/ip remote io and vsd. i have tried increasing my task times and watchdogs. and when i view my PLCload in the shell its normally around 3-4%, highest ive ever seen is 7%. Nothing i do seems to help the issue. Could the HMI's Codesys CPU be getting to hot do to high ambient temp?
Last updated: 2026-02-01

Post by kunal-pinetics on USB Communication for IP Configuration & Application Update – STM32H Series PLC ^{CODESYS Forge talk (Post)}
Hello everyone, I am currently working on a PLC device based on the STM32H series MCU, running CODESYS. At the moment, I can: Change the Ethernet IP address Update/download the PLC application via Ethernet without any issues. However, I would like to implement the same functionality over USB (or Serial via USB) instead of Ethernet. My goals are: Change the device’s Ethernet IP address via USB Download/update the PLC application via USB communication Possibly use USB as a service/programming interface The hardware platform is based on STM32H series, and I am looking for guidance on: Whether CODESYS supports USB device communication for runtime download If a custom USB CDC (Virtual COM Port) implementation is required Whether a specific CODESYS runtime configuration is needed If a bootloader approach is recommended for application updates via USB If anyone has experience implementing USB communication for runtime download or device configuration on an STM32-based PLC, I would really appreciate your guidance. Thank you in advance for your help.
Last updated: 2026-02-26

Post by sukrit on TargetVisu on Raspberry? ^{CODESYS Forge talk (Post)}
thanks for this, w need to know the requirements on linux side... can you guide towards a linux installation package..
Last updated: 2024-08-28

Post by installwhat on Login to Visu optional ^{CODESYS Forge talk (Post)}
you can restyle the landing page and do a login via st
Last updated: 2025-07-16

Post by timvh on library is not available ^{CODESYS Forge talk (Post)}
1) In the library manager of your project select "Download missing libraries". 2) In the library manager open the "Placeholders" dialog. In here find the Placeholder which is not referenced to a specific library yet. Click in this line on the Library column and select the latest version of this library.
Last updated: 2025-03-24

How to select the real I/O module terminals/channels in CODESYS V3.5 ? Or better to say, How to specify the real physical terminals of analog and digital I/O modules in the CODESYS programm ? ^{CODESYS Forge talk (Thread)}
How to select the real I/O module terminals/channels in CODESYS V3.5 ? Or better to say, How to specify the real physical terminals of analog and digital I/O modules in the CODESYS programm ?
Last updated: 2022-08-13

How to select the real I/O module terminals/channels in CODESYS V3.5 ? Or better to say, How to specify the real physical terminals of analog and digital I/O modules in the CODESYS programm ? ^{CODESYS Forge talk (Thread)}
How to select the real I/O module terminals/channels in CODESYS V3.5 ? Or better to say, How to specify the real physical terminals of analog and digital I/O modules in the CODESYS programm ?
Last updated: 2022-07-29

Post by alexgooi on Network variable stops sending ^{CODESYS Forge talk (Post)}
Are you making use of structs in the NVL? In the past I had similar behavior (NVL stops sending) when I added something in the struct. if you are making use of structs makes sure that the structs are identical in both projects. If this is not the case, have you tried changing the port number to something different than 1202?
Last updated: 2026-04-29

Post by olehmann03 on PFC200 - WAGO 750-8202 - MODBUS RTU ^{CODESYS Forge talk (Post)}
Hello, I’m working on implementing Modbus RTU communication with a Carel controller (CPCO). I want to use the front RS485 interface through the DB9 connector. The issue is that I can’t get the communication working correctly. Below are the steps I’ve done so far: Connected pins 3 and 8 from the DB9 connector to the +/- RX/TX terminals on the Carel side. In the PLC shell, I set serialmode to RS485. In WBM under Administration > Serial Interface > Assign owner of serial interface, I set the port to unassigned. In the device tree, I created Modbus_COM with the following settings: COM port: 1 Baud rate: 19200 Parity: None Stop bits: 1 Created a Modbus client on this COM interface in RTU mode. Under the status tab, I can see it is in running state. On the client, I created a Modbus server and set the Modbus address of my unit to 1. Defined a few channels as FC03 to read holding registers according to the Carel register map. I checked the communication with the Carel controller using a USB-to-RS485 converter connected to my PC, and communication works correctly there. In the status tab, I can see that the Modbus server is polling, but there is no response from the controller. I also tried multiple times swapping A/B lines on the Carel side, but it did not help. Do you have any suggestions on what else I should check?
Last updated: 2026-05-22

Post by olehmann03 on PFC200 - WAGO 750-8202 - MODBUS RTU ^{CODESYS Forge talk (Post)}
Hello, I’m working on implementing Modbus RTU communication with a Carel controller (CPCO). I want to use the front RS485 interface through the DB9 connector. The issue is that I can’t get the communication working correctly. Below are the steps I’ve done so far: Connected pins 3 and 8 from the DB9 connector to the +/- RX/TX terminals on the Carel side. In the PLC shell, I set serialmode to RS485. In WBM under Administration > Serial Interface > Assign owner of serial interface, I set the port to unassigned. In the device tree, I created Modbus_COM with the following settings: COM port: 1 Baud rate: 19200 Parity: None Stop bits: 1 Created a Modbus client on this COM interface in RTU mode. Under the status tab, I can see it is in running state. On the client, I created a Modbus server and set the Modbus address of my unit to 1. Defined a few channels as FC03 to read holding registers according to the Carel register map. I checked the communication with the Carel controller using a USB-to-RS485 converter connected to my PC, and communication works correctly there. In the status tab, I can see that the Modbus server is polling, but there is no response from the controller. I also tried multiple times swapping A/B lines on the Carel side, but it did not help. Do you have any suggestions on what else I should check?
Last updated: 2026-05-22

Post by kurtk on Modbus TCP Server ^{CODESYS Forge talk (Post)}
ditto I'm just getting my codesys wheels on and the modbus stuff is confusing. I am re-platforming an existing PLC application On that platform one could simply tag variables to register numbers and the whole shooting match could be accessed via modbus and typically holding registers and input registers were treated the same way... On codesys I see there is a modbus TCP server Device I/O mapping tab and a Modbus TCP server IEC objects tab I get the sense that one can configure the serving of variables both/either way but am unclear about the optimum/necessary path. Apparently in the IEC Objects tab one can "ADD" something or other - presumeably channels. I have created a preliminary function block but the Select Function Block window shows nothing to select WTH ? I exported the Device mapping and was surprised to see the entire Device IO map - complete with all the bit-mapped holding/input registers!! WTH!!?? Bit-mapped words are strictly a nichey special purpose application. I am targetting making a couple hundred variables available which would turn into hundreds of pages of IO/mapping Is the FUnction Block IEC objects thingy an alternative to that ? I notice that CODESYS shows the tags which the PLC used to specify the register address... are tags used in CODESYS for any specific hard-core purpose ?
Last updated: 2025-08-19

Post by karel-bas on Loosing connection to emulation running on Linux ^{CODESYS Forge talk (Post)}
Ok. I ran the vm twice until it failed and from log it seems like my OPC UA fails becouse I am not able to get HTTPs certificate ? I dont really see any other reason.
Last updated: 2024-09-20

Post by hanoues on Error 550 delete opertion failed ^{CODESYS Forge talk (Post)}
hello, Can anyone help me with my FTP problem on Windows 10? When I try to remove a folder, I can't, and it shows the error message 550.
Last updated: 2024-05-21

Post by rshabsh on Using Latch Variable in Alarm as input from text list ^{CODESYS Forge talk (Post)}
I am currently utilizing Alarm Manager’s Latch Variable 1 to display additional information related to alarms. However, instead of mapping this latch variable to a fixed PLC variable, I would like to dynamically update its text content based on the selected language in the system. To achieve this, I am considering using a text list that corresponds to different languages rather than directly linking Latch Variable 1 to a PLC variable. This approach would allow the displayed alarm information to be automatically translated according to the active language setting. Could you please confirm if this method is feasible within the Alarm Manager configuration? Additionally, if there are specific steps or best practices to follow when implementing this functionality, I would appreciate any guidance you can provide. Looking forward to your insights.
Last updated: 2025-02-26

Post by willbechel on Errors about PLC configuration in CoDeSYs software ^{CODESYS Forge talk (Post)}
I saved it as the same project but in a different location. I opened this "new project". I clicked on the "Direct Login from Automation Builder" button. It automatically directed me to CODESYS, where I was able to create the "Create Boot Project" but first I also clicked login again but inside CODESYS keeping the automation builder login online. Additional Information: The "Create Boot Project" function in CODESYS is used to create a project that will automatically start when the controller is booted up. To create a boot project, you must first create a new project in CODESYS. Once you have created a new project, you can then use the "Create Boot Project" function to create a boot application. The "Create Boot Project" function will create a new application that is based on the current project. The new application will be saved in the same location as the current project. You can then download the new application to the controller.
Last updated: 2024-02-01

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