Post by rh-pk on v3.5 SP19 - Modbus TCP Devices - Channel Limit? ^{CODESYS Forge talk (Post)}
Hi, i found a solution for me. I had installed a 'old' version of CoDeSys (3.5.18 P5). I tried to add channels there, which works fine. I created a new project, added an Ethernet-Port, added a Modbus-Master and then I copied the ModBus-Slave from my working project to the new project. Now I could add more channels. I add the channels 10 and 11. Then I deleted (please make a backup before :-) the original ModBus-Slave in my working project and copied the extended Slave back to my working project. Surprisingly it is now possible to add new channels. Maybe this will help you.
Last updated: 2024-02-14

Post by k2saki on CNC Open Source Project / Can I convert my project to text-files ? ^{CODESYS Forge talk (Post)}
Hi. I published My CODESYS-CNC Project to GitHub and I set it Open Source Software. Here https://github.com/k-s-saki/RPi_CODESYS_CNC My CNC Project is binary file , using FBD for IPO , so I found it is a little bit hard to work with people on GitHub. (diff / merge ) My question is 1) Is it possible to convert my project ( only POUs is also fine ) into text file ? How? 2) Would it be better to rewrite all FBD/LD into ST and copy them manually to text files? Thanks.
Last updated: 2024-05-16

Post by dasch on eCockpit - unable to start simulation ^{CODESYS Forge talk (Post)}
This is a known bug in e!Cockpit. See Release notes of V 1.11: 1 e!Cockpit Release Version 1.11 (2022-07) ATTENTION: If a library that uses asynchronous tasks (e.g. WagoAppConfigTool, WagoAppCloud or function modules such as Dali-Master) is dragged into the project, the simulation cannot be started. It is already sufficient to add the library to the project (an FB does not even have to be instantiated). I guess you are using one of these libraries/modules in your project. We e.G. often use PWM modules, these are also affected.
Last updated: 2023-09-05

Post by patliby on Cannot Find "Automatically Generate POUs" Option ^{CODESYS Forge talk (Post)}
I would like to enable the feature to automatically generate POUs for Project/Library properties in some of my library/project files. The Codesys help pages indicate it should be on the bottom of the Project Information Summary tab, but mine has no such options (see screenshot). Is there somewhere I have to enable this overall feature or any other prerequisite I am missing? I am using Codesys 3.5.19.20 Reference https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_obj_project_information.html#UUID-9ddc3572-a024-5a49-c0c1-31677991a419_id_c95bfe46c6c18a67c0a8640e01715107_id_0a188ec6fa561b9fc0a8640e0019d8bf
Last updated: 2025-05-08

Post by wbj0t on Update project from SP20 to SP21 ^{CODESYS Forge talk (Post)}
Hello everyone. I have a problem: I installed new version of codesys IDE. When I try open project in this new version, I have many errors about Visu: rectalnge/button/frame/etc does not exist. How update properly project? 20+ pages of visu pages from 100+ frames and all visu elems looks like "Error image". It is not problem of SP20->SP21. Any update has problems from visu side.
Last updated: 2025-06-09

Post by timvh on Device logon problem following fresh install ^{CODESYS Forge talk (Post)}
In your project you selected the "CODESYS Control Win V3" as device, but the device you want to connect to is a "CODESYS Control Win V3 x64". Those are not the same. If you double click on the device during the network scan, you will get information that these are not the same, but that you can change the type in your project to the x64 bit type. Another option is to "right-click" on the device in the device tree of your project and select "update device" then select the x64 type.
Last updated: 2024-03-19

Post by ofey on Modbus TCP communication ^{CODESYS Forge talk (Post)}
Hi! I tried setting up the PLC I'm working with (Beijer GN-9373) to connect to a modbus master running on a laptop. I have an ethernet connection (via USB-C to ethernet) between the laptop and the controller. I have tried following tutorial on how to set this up. I have added an ethernet device with the IP-address of the PLC. Further I added a ModbusTCP_Slave_Device with default settings. I get the error "Failed to open TCP Port: 1" when I try to go online with the PLC. Earlier I tested the exact same set up with the soft PLC from codesys. I can then read/write values correctly with the Modbus master i have running on the laptop. Hope anybody can help me with this, thanks in advance!
Last updated: 2023-10-06

Post by dekelec on The current baud rate could not be determined in CR0020 IFM with maintenance tool ^{CODESYS Forge talk (Post)}
It could be a problem with the cable pinout on either side: 9 pin D-SUB connector (male) - PC side Pin Potential: 1 n.c. 2 RxD 3 TxD 4 n.c. 5 n.c. 6 GND 7 n.c. 8 n.c. 9 n.c. Shell Shield Check if TxD and RxD cross between pins 2 and 3 (what is the Recive signal/wire to one device it's a Transmit signal/wire for the othe device) or with COM port settings: Bits per second: 9600 Data bits: 8 Parity: None Stop bits: 1 Flow controll: None
Last updated: 2024-07-09

Post by vamsi on How to configure gateway for programming RPi 2B using Codesys ^{CODESYS Forge talk (Post)}
I am using a Raspberry Pi 2B. Installed Codesys V3.5.20.1 64-bit and installed 'CODESYS Control for Raspberry PI 4.12.0.0' I am able to install the packages using the 'Update Raspberry Pi' option, but when I try to log into the RPi, in the Device tab it says 'Sacn fail. Please checl that the gateway is running and that its settings are correct'. My setup looks like this. I connected my RPi to my company LAN and also my laptop to company LAN (using HP Docking station). This setup worked when I installed 'CODESYS Control for Raspberry PI', but now I donot know how to configure the gateway. Could anyone please help me in finding what I have to enter in the gateway configuration? Thanks, Vamsi.
Last updated: 2024-07-10

Post by mubeta on parker servo and position ^{CODESYS Forge talk (Post)}
Reading between the lines of what you did not specify, it therefore seems to appear that in the programme, at the end of the movement order, there is an order to remove power and switch off the pulse modulation. if this is the case, it is obvious that the motor then remains free. If the position is to be maintained at the end of the movement, the motor current modulator, which on the PLC side is controlled via the MC_Power method, must not be interrupted. Another possibility is that in the motor drive settings, the standstill torque current is set very low or zero and without position monitoring. You have to check this via the servo motor drive.
Last updated: 2024-08-05

Post by khaledkhalil on Question about the hairaichy of UaExpert ^{CODESYS Forge talk (Post)}
Hello, I am Examining this Example from Codesys Tutorial about OPC-UA server here https://www.youtube.com/watch?v=aJhzN3Uk-Do&list=PLWtD08CpmZcSV26aWh1axCAef5c5HxX-3&index=1&t=1167s. Now i am running to problem, when i create instances and i want them to appear directly under the object directory, However, it always appear with me under Objects >> Device set >> Device Name in CODESYS. I need to know how i can change the directory of my instances 'inst_3' and so on. So they can be under objects directly. I tried to modify the settings, but couldn't find any leads till now. Thanks in advance for helping
Last updated: 2024-09-12

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 taqamert on CANopen PDO Issue with Pressure Sensor in Codesys ^{CODESYS Forge talk (Post)}
Hello everyone, I am using an IFM CR0303 model PLC, which has a tilt sensor and a pressure sensor connected via CANopen. Both sensors are from the same brand (ATEK). I can read data from the tilt sensor without any issues, but I am unable to read data from the pressure sensor. I have added the EDS file in the PLC configuration and adjusted the node-ID settings. When I check with the PCAN-View application, I can see that the selected PDOs are coming through, but the data is not reaching the Codesys side. What could be the issue, and what can I try to resolve it? Can anyone help me?
Last updated: 2024-10-22

Post by timvh on Modbus TCP & RTU with Control for Linux SL ^{CODESYS Forge talk (Post)}
RS485 doesn't seem very logical to use in VPLC's in my opinion. I also don't know if this is supported.... But for TCP/IP, I think you still need to configure the Nic settings. See the attached png. In my case enp6s0. When changing this setting, restart the VPLC. What is really nice, is that you don't have to configure the IP address setting in Linux. By setting the Nic to a certain IP address in the CODESYS instance configuration, this is automatically done for you. I only tested this with EtherCAT, but I guess this works the same for Modbus TCP/IP.
Last updated: 2024-10-23

Post by timvh on Modbus TCP & RTU with Control for Linux SL ^{CODESYS Forge talk (Post)}
It seems you have 2 network interfaces. Did you try eth1? Did you already configure the IP address for this interface in Linux? If yes, then maybe undo this. - or only set eth0 in the Nic configuration without anything else (so no IP address, because this is already set in Linux). For more information about the Nic settings, see (probably already read it?): https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_obj_deploy_control_sl_configuration.html PS, if you only want to run CODESYS Control SL, you don't necessarily need the Virtual PLC variant. You could also install and run the CODESYS Control SL Runtime in the Host operating system. This way you should also be able to access the serial port and directly access all ethernet ports. Maybe this is easier?
Last updated: 2024-10-23

Post by hardcoder on EtherCAT Mailbox Gateway ^{CODESYS Forge talk (Post)}
Hi all I found that in the last Ethercat master release (4.8.0.0) the Mailbox Gateway feature has been added. This would be useful for me to connect to a specific slave in my system, since its configuration software supports this type of gateway communication. Anyway I don't find usage information or examples. At the moment I tried to enable it in the ethercat master device settings and I configured with an IP address on the subnet of the ethercat adapter (i.e. ethercat nic configured with static ip 192.168.10.100 subnet 255.255.255.0, mailbox gateway configured to 192.168.10.30). I expected it would have responded to ping commands on the address but nothing happens. I am missing something?
Last updated: 2024-12-11

Post by askic on Name Validation of Visualization objects ^{CODESYS Forge talk (Post)}
Hello, In my projects, I'm following this recommendation about the rule names in Codesys https://content.helpme-codesys.com/en/CODESYS%20Development%20System/_cds_rules.html, so I always use backtick identifiers, not only for variables, but also for the object names. However, I have noticed that in the current version of Codesys, when adding Visu object, it is not allowed to used these identifiers in the name. This is very different from all other objects like, folder names, POU names, Variable list names etc. I wonder if there is some hidden settings I can use to enable backtick identifiers in the Visu object names? Attached is a screenshot with the details. Thank you!
Last updated: 2025-01-10

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 ameba on PersistentVars and Webvisu Element ^{CODESYS Forge talk (Post)}
hello everyone I would like to try to better understand how persistent variables work. I created some boolean variables in the PersistentVars section initialized to the value TRUE. I have tied these boolean variables to toggle switches placed inside the HMI interface pages. Once the PLC program is started, the lever selectors, if operated, change their state, at least at a graphical level, but the persistent variables do not undergo any variation. Initially the above variables were declared as simple global variables, in this case the operation with the levers was correct; I then tried to transform them into persistent ones with the aim of using them as "settings saver" Thank you for support Bye
Last updated: 2025-04-03

Post by pernockham on Control for linux SL, 4.14.0.0 -> 4.15.0.0 breaks web page access. URL requires authentication ^{CODESYS Forge talk (Post)}
I have a problem which I have identified with a device-update from 4.14.0.0 to (4.15.0.0-4.17.0.0) where the newer versions will stop any local access to the internal web page with the browser responding "The requested URL requires authentication". Setting the device back to 4.14.0.0. the web page will respond. Access to web page through Automation server is possible also for the newer version, but not "local" access. Runtime (Codesys control for linux SL) is on 4.17.0.0. I have tried to manipulate settings for 'Access-Control-Allow-Origin' '*' always; through nginx (normally a proxy_pass to localhost:8080). Also tested bypassing nginx by accessing 8080 directly with the same result.
Last updated: 2025-09-08

Post by snhatton on OpC UA server on Raspberry Pi 64 SL runtime ^{CODESYS Forge talk (Post)}
Good afternoon, After changing the security settings to: CommunicationPolicy: POLICY_BASICSHA256SHA256 CommunicationMode: ALL Activation: Activated UserAuthentication: ENABLED Then generate a new certificate on the device for the OPC-UA server from Security Agent->Device->OPC UA Server. Restart the runtime using tools->Update Raspberry Pi->Stop->Start for the changes to take effect. It may take a minute for the runtime to start. Initiate the connection from the UA server side. You should see a pop-up asking you to trust the certificate. Click on the button 'Trust Server Certificate'. Next, you should see a certificate in the quarantined folder of the security agent in CODESYS. Click and drag this from quarantined to trusted and then try connecting from UA expert to the device. These steps worked for me and my setup and I hope they can help you!
Last updated: 2023-12-11

Post by dhumphries on Ethernet/IP Issue ^{CODESYS Forge talk (Post)}
Make sure the O->T and T->O bytes required by the remote device match the configuration in Codesys. Most of the EDS files I've imported have not worked by default. See the attached images for the connections and assemblies tabs. Note that the connections are in Bytes and the assemblies are in bits, you have to have enough bits to equal the bytes. Either mismatch will give a red/orange triangle. Page 343 of the manual (assuming the STF10-IP is an applied motion microstep driver) has some recommended connection settings, you should be able to confirm the input and output bits somehow, some devices have a web GUI, some require a software tool.
Last updated: 2024-02-03

Post by arundara on OPC UA Server Stops after 5 consecutive disconnections of ethernet port ^{CODESYS Forge talk (Post)}
Hello Every one, During testing of OPC UA communication between UA Expert software and the CODESYS SoftPLC on a Linux environment, an observation was made. When the Ethernet cable was disconnected and reconnected with 2-minute intervals, on the 5th attempt, the OPC UA connection failed to establish in UA Expert software. At this juncture, restarting the CODESYS SoftPLC enabled the reestablishment of OPC UA communication. The same result was obtained when testing on a Raspberry Pi SoftPLC. What is the reason behind this phenomenon? and whether there are settings to stop this behavior? Please help. Thanks & Regards.
Last updated: 2024-02-13

Post by peterned on CNC - system goes to X=0 Y=0 before CNC file execution starts, how to avoid that? ^{CODESYS Forge talk (Post)}
Hi, I have a XY system and use a CNC file to move it. Everything works OK, except for the following: when CNC execution starts, the system rushes at high speed to (X=0, Y=0) point, and only then goes to the first line of the CNC file. If one of the axes is near 0, the system jumps and immediately stops with an error. In the CNC file settings (screenshot attached) I specified low default values for speed/acceleration and a start position different from 0,0 - but all that is ignored. Any idea how to avoid that move to 0,0 ? Thanks.
Last updated: 2024-04-26

Post by pernockham on Trend legend naming and access/config to/of trend/legend-variables ^{CODESYS Forge talk (Post)}
There seems to have been included an updated in the last release 4.9.0.0 or am I wrong (I think I tried out these settings previously without giving the result I wanted contrary to what I see today)? Now an empty check box for "display variable name" is effective, and will present the Variable with the "Description" instead. Perfect! Seems to be some minor formatting still that needs adjustment. See attached screenshot. The apostrophe "'" between "description" I suppose should not be there? Also I guess the same apostrophe (although not visibly shown) gives an extra space between the variable-description and the ":"?? Thanks!
Last updated: 2025-12-19

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