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Post by leandroct on Creating Boot Application not working ^{CODESYS Forge} ^talk ^(Post)
I have a Control Win V3.5 SP20 (64-bit) application, and until now, I open the program (with a password) and download it. However, I need to give the client the option to install the program on the Controller, without them having to open it and access the code. So, I followed these steps: 1 – In the Online => Create Boot Application menu, I saved the generated files in a directory: Application.app Application.crc PlcLogic\visu\ directory with several files 2 – In the SysTray, I ran the PLC, and it created a directory. In the root of this directory (C:\ProgramData\CODESYS\CODESYSControlWinV3x64\E84889DB), I pasted Application.app and Application.crc. Since it created a \visu directory, I pasted the PlcLogic\visu\ files generated in Create Boot Application into it. 3 - In the general Codesys directory (C:\ProgramData\CODESYS\CODESYSControlWinV3x64), I edited CodesysControl.cfg, adding: [CmpLog] Application.1=Application 4 - When running the PLC, nothing happens and the TargetVisu screen does not open. What I'm doing wrong?
Last updated: 2025-09-03

Post by timvh on Codesys virtual control redundancy ^{CODESYS Forge} ^talk ^(Post)
I think it depends on what you consider as redundant. Is it allowed to plug the network cable in another device (server), move the USB key with license to the other device (server) and then start it up? Or should it automatically switch over within msec and take over the communication with the I/O flawlessly without noticing the switchover? We helped several customers setting up the CODESYS Redundancy functionality and the nice thing is that when you have it up and running, you can easily switchover from active to passive and when you download a new applicaiton, CODESYS handles the update of boot project on the passive controller automatically. Sure this will require an additional license and the license for redundancy, but if your installation is that critical it should be worth it. Please contact us (Extend Smart Coding) if you need any further information. We could help you setup the configuration and possibly provide the licenses for it (I noticed you are situated in the Netherlands).
Last updated: 2025-09-04

Post by shamcke on Array with generic constant as persistent variable ^{CODESYS Forge} ^talk ^(Post)
Hello, I have written a function block that uses a generic constant for the upper bound of an array. I wanted to have this array in the persistent memory area, thus I constructed my FB as follows: FUNCTION_BLOCK FbWithGenericArrayLength VAR_GENERIC CONSTANT uiArrayLength : UINT := 10; END_VAR VAR PERSISTENT arr : ARRAY[1..uiArrayLength] OF INT; END_VAR In my PLC_PRG I declare an instance of said FB PROGRAM PLC_PRG VAR myFb : FbWithGenericArrayLength<10>; END_VAR This compiles just fine. When I let CODESYS fill my persistent list, it adds duplicate entries {attribute 'qualified_only'} VAR_GLOBAL PERSISTENT RETAIN // Generated instance path of persistent variable PLC_PRG.myFb.arr: ARRAY [1..uiArrayLength] OF INT; // Generated instance path of persistent variable PLC_PRG.myFb.arr: ARRAY [1..uiArrayLength] OF INT; END_VAR so I manually delete the duplicate. When i now compile, I get errors ------ Build started: Application: Device.Sim.Device.Application ------- Typify code... [ERROR] Sandbox_FW31: PersistentVars [Device: PLC Logic: Application](Line 4): C0161: Border 'uiArrayLength' of array is no constant value [ERROR] Sandbox_FW31: PersistentVars [Device: PLC Logic: Application](Line 4): Type of mapped variable is not equal to original type Compile complete -- 2 errors, 0 warnings Build complete -- 2 errors, 0 warnings : No download possible Is is simply not possible to use a generic constant for the persistent array? Thanks in advance. Edit: It seems I can manually replace the uiArrayLength in the persisten list by the value 10 I used as the generic constant for this particular instance.
Last updated: 2026-05-29

Post by liamb on Converting CANbus to Decimal from signed 2's complement ^{CODESYS Forge} ^talk ^(Post)
I need to combine two 8 bit CANbus messages to 16 bits signed int then convert to decimal Decimal from signed 2's complement. I've been using the below code to read for new messages, combine them then assign them to a variable What is the best way to do this for from signed 2's complement? fbRxMessage351(Data := RxMessage351Data); IF fbRxMessage351.NewMessage THEN ChargeVoltage := (WORD_TO_REAL((RxMessage351Data[0]) + ((RxMessage351Data[1]) * 256))) * 0.1; END_IF
Last updated: 2024-08-16

Post by timvh on Unable to Connect to Modbus RTU Device ^{CODESYS Forge} ^talk ^(Post)
If your Control Win is the Modbus "Master" then your configuration should be something like: Modbus_COM (Serial port) - Modbus Master (this is the Control Win SoftPLC actively setting up the communication) - Modbus Slave (this is then your WAGO 750-315) You need to add channels to the Modbus Slave configuration to inform the master which variables to read/write from the Wago module. The way you configured it now, the Control Win is also a slave. PS, don't forget to put the PLC (Control Win) in Run.
Last updated: 2024-09-03

Post by dogulas on OPC UA C# client connecting to OPC UA CODESYS server ^{CODESYS Forge} ^talk ^(Post)
Ok, for the sake of completeness in case anyone else has this problem. I can tell you that what finally worked for me was to change the line: // create an ExtensionObject to wrap the value to be written ExtensionObject extensionObject = new ExtensionObject( new ExpandedNodeId("GVL_StructA", 5), structAData ); to: // create an ExtensionObject to wrap the value to be written ExtensionObject extensionObject = new ExtensionObject( new ExpandedNodeId("GVL_StructA|defaultbinary", 5), structAData ); I'm sure there are many other problems that could cause this very generic error, but this was my problem.
Last updated: 2024-12-30

Post by nz-dave on sysfile- transfer file to pc ^{CODESYS Forge} ^talk ^(Post)
Hi Trying to send csv file to c:\data\xxx.csv Im able to save to plclogic and after doing this https://forge.codesys.com/forge/talk/Runtime/thread/5cac1390b4/ i can now "file transfer" to host pc downloads. but still cant transfer to c:\ im sure i have done this in the past with older versions of the 3.5 ide? just concat the file name as c:\data\My_Filename.csv. any ideas? cheers
Last updated: 2025-04-23

Post by gabrielarffa on Modbus TCP/IP having problems with global variables ^{CODESYS Forge} ^talk ^(Post)
I'm using Modbus TCP/IP to communicate Codesys with Elipse E3 as the master for a college project. I have made a list of global variables to organize the programming in two different POUs. The problem is, when I try to do the mapping of variables, the program informs me of an error due to the identifiers having a "." on their names. Do I have to reorganize my code to make it an unified block or is there a way to declare their names without changing all the code structure?
Last updated: 2025-05-20

Post by akrawczyk on Dynamically enabling/disabling Modbus slave devices in runtime (performance issue with timeouts) ^{CODESYS Forge} ^talk ^(Post)
Hi everyone, I'm working on a CODESYS-based project running on a Weintek cMT2078X HMI with a built-in CODESYS runtime. The system communicates with multiple Modbus RTU slave devices, arranged in a cascade. The number of connected units can vary between 2 and 8, depending on the installation. Each slave has 17 Modbus channels, which are polled cyclically every 5 seconds. The issue is that when fewer devices are physically connected (e.g. only 3 out of 8), the Modbus master still attempts to communicate with all configured slaves. This leads to massive delays due to timeouts (currently 200ms per channel). For one disconnected device, that’s: 17 × 200ms = 3.4 seconds of delay per polling cycle, and this quickly multiplies with each additional missing slave. This behavior significantly degrades the system's performance and responsiveness. We attempted a workaround where we tried to trigger polling based on a variable in the PLC program, but this caused instability and even led to hardware hangs/freezes on the cMT2078X – likely due to clashes in how the Modbus polling engine and program logic interact at runtime. My main questions are: Is there a way in CODESYS to dynamically enable/disable Modbus slave devices at runtime, using a BOOL or INT variable (e.g. indicating number of active slaves)? Can devices or channels be conditionally polled or temporarily disabled without removing them from the device tree? Are there any best practices or examples for handling variable numbers of Modbus slaves in scalable systems like this? Would splitting communication across tasks or interfaces help reduce the impact of timeouts? Any advice, documentation references, or architectural suggestions would be extremely helpful. I'm looking for a robust way to dynamically scale slave polling without degrading system stability or performance. Thanks in advance!
Last updated: 2025-08-11

Post by gunstr on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge} ^talk ^(Post)
I now tried to install 4.17.0.0 on a fully clean installations: A brand new RPi 4B Install latest Raspberry Pi OS Lite, Release date 13 May 2025, 64bit run sudo apt update && sudo apt full-upgrade When asked - Select to install the updated version of '/etc/initramfs-tools/initramfs.conf' Install CODESYS Control for Raspberry Pi SL. version 4.17.0.0 Log output: [INFORMATION] Connected successfully! [INFORMATION] Successfully connected to target (192.168.0.197) [WARNING] No supported container engine found on device. You have to install a supported container engine to use Virtual Control. Please contact the Administrator of the device. [WARNING] Error detecting container architecture [INFORMATION] Finished reading device information [ERROR] Error output: /var/lib/dpkg/info/codesyscontrol.postinst: 88: check_legacy_extensionapi_folder: not found [INFORMATION] Standard output: Selecting previously unselected package codesyscontrol. [INFORMATION] Standard output: (Reading database ... 76772 files and directories currently installed.) [INFORMATION] Standard output: Preparing to unpack .../codesyscontrol_raspberry_4.17.0.0_all.deb ... [INFORMATION] Standard output: Unpacking codesyscontrol (4.17.0.0) ... [INFORMATION] Standard output: Setting up codesyscontrol (4.17.0.0) ... [INFORMATION] Standard output: make config rw [INFORMATION] Standard output: set folder permissions [INFORMATION] Standard output: prepare permissions [INFORMATION] Standard output: check legacy extension api folder [INFORMATION] Standard output: create and install daemon [INFORMATION] Standard output: codesyscontrol started [WARNING] Unable to detect Raspberry Pi Architecture. Setting armv6l as default, you can change this through the settings panel. [INFORMATION] Standard output: codesyscontrol stopped [ERROR] Expected exit value of command failed: expected 0, received 1 [WARNING] Error setting the Raspberry Pi Architecture [ERROR] Error installing codesyscontrol If I read the log correctly the control is actually installed but cannot start. I'm running out of ideas how to proceeed now, any suggestions are welcome.
Last updated: 2025-09-03

Post by jp23 on Unable to Connect to Modbus RTU Device ^{CODESYS Forge} ^talk ^(Post)
Hi all, I am attempting to use the Control Win V3 soft PLC to control a WAGO 750-315 remote I/O system via modbus RTU communication. I am struggling to connect to the device. I have been following this tutorial: https://www.youtube.com/watch?v=YlRfkESaNds I have setup my devices as shown in the images below. I have verified that my com port settings are correct as I am able to connect/control using modbus simulator software with these settings. I have also connected to a modbus master simulator program as instructed in the video, but the orange triangles will not go away. Additionally, I have updated my settings to 485 using the PLC shell. I have also set "always update variables" to enabled (1). Serial port, PCI-Bus, and modbus serial device status all show as "Not Running."
Last updated: 2024-08-26

Post by yannickasselin on codesys VLAN tagging ^{CODESYS Forge} ^talk ^(Post)
Hi, I am looking for exactly the same thing. I would think that using a layer 2/3 managed switch should work but I am not convinced. I would like to test it in order to see if it would be possible to run many Codesys Docker instances on a server and run only 1 ethernet cable from the server to a managed switch closer to the machines beeing controlled instead of having to run multiple long ethernet cables. I was going to buy a managed switch in order to test it but I want to first make sure it is possible and I want to figure out exactly what kind of switch I would need. Is this even possible? I think this is a feature that would be very useful paired with "Codesys Virtual Control SL". Thank you
Last updated: 2024-09-07

Post by dkugler on Webvisu Combined Authentication ^{CODESYS Forge} ^talk ^(Post)
you are able to do this all in one screen. It is possible to set the rights of every element to visible but not editable for the user "none". so everyone is able to see this elements, but can't do any changes. At the login button you set the rights to editable for the user "none" to be able to go to the login. Every element that should be hidden before logging in, set the rights visible and editable only for "higher" users. Hint: to change rights you are able to select more then one element and edit rights for all at the same time. Saves a lot of time! Good luck!
Last updated: 2025-09-03

Post by sawicpx on CANbus Remapping PDOs During Runtime ^{CODESYS Forge} ^talk ^(Post)
Hello, I am working on an application where I need to remap PDOs to a different CANopen object during runtime depending on what value is at a specific register. I have gotten to the point where I put the device into Preoperational State using the CIA405.NMT function. I then reconfigure the PDO 180x and 1a0x obejcts usings SDOs to point to a new canopen object on the device however when I go to restart the Device from PREOP to OP using the CIA405.NMT function the device is reset back to the original configuration as per the initial setup. I am wondering is there any way to change the PDOs at runtime is there some more functionaility I can access to do this. Any direction is appreciated!
Last updated: 2023-12-22

Post by joanm on Programmatically change the IP addresses of the Modbus TCP slave devices ^{CODESYS Forge} ^talk ^(Post)
Hello all, I am working in a project in which there are multiple Modbus TCP slaves. I need to be able to change the IP addresses of those devices from the HMI and I was planning to use the process depicted here: https://faq.codesys.com/display/CDSFAQ/Modbus+TCP+Slave%3A+Dynamic+Setting+of+the+IP+Address I can see the port number is what is used to specify which slave device we want to modify the IP address of. This said, can I freely set arbitrary port numbers to each device? I mean, can I set the first device to be at port 502, the second one at port 503... Any drawback or restriction? Is there any other way to reference to the device without having to change the port numbers? Thank you all in advance.
Last updated: 2024-01-04

Post by niallel on Continuous MC_PositionProfile ^{CODESYS Forge} ^talk ^(Post)
Hi, Is it possible to have a MC_PositionProfile that runs continuously again and again without stopping the motor and starting again. I have a profile that contains about 50 steps that I want to repeat. At the end of each run the motor comes to a stop before the next one starts. My code checks for Done, then resets the Execute to False before setting Execute to True to run again, and I think this is causing the motor to go to standstill before starting again. There doesn't seem to be a BufferMode option like with MC_MoveAbsolute. Is it possible to do this? Many thanks,
Last updated: 2024-04-11

Post by timvh on How to implement an interface (IElement)? ^{CODESYS Forge} ^talk ^(Post)
See: https://forge.codesys.com/prj/codesys-example/element-collect/home/Home/ This contains an application "OnlineChangeSafeLinkedListExample". What you should do is create a new interface which has your "Priority" property. Then your FB should extend the base element function block and implement your own interface: E.g. FUNCTION_BLOCK MyElement EXTENDS COL.LinkedListElementBase IMPLEMENTS I_MyInterface Then the __QUERYINTERFACE does the magic to check if your "element" also implements your interface. Something like this: // Compares this element with itfElement. // Returns 0 if the elements are equal, < 0 if the element is less than itfElement, // > 0 if the element is greater than itfElement. // This method will be called from sorted collections (e.g. |COL.SortedList|) to sort the elements. // IMPORTANT: The underlying value to be compared with MUST NOT be changed during the lifecycle of the object. METHOD ElementCompareTo : INT VAR_INPUT (* The element to compare*) itfElement : COL.IElement; END_VAR VAR itfIntElement : I_MyInterface; xResult : BOOL; END_VAR // We use integer iInt1 for sorting. xResult := __QUERYINTERFACE(itfElement, itfIntElement); IF xResult THEN IF iInt1 < itfIntElement.Priority THEN ElementCompareTo := -1; ELSIF iInt1 > itfIntElement.Priority THEN ElementCompareTo := 1; ELSE ElementCompareTo := 0; END_IF ELSE ElementCompareTo := -1; END_IF
Last updated: 2024-07-22

Post by denkihitsuji on Content update through Data URI on Web Brower on Visualization Toolbox ^{CODESYS Forge} ^talk ^(Post)
Objective: I want to dynamically update the content with strings and JPEG images received from a TCP/IP socket. For this purpose, I am exploring the possibility of utilizing the Web Browser feature of the Visualization toolbox. Example: In a standard web browser, entering data:text/plain;charset=utf-8;base64,SGVsbG8gc3RyYW5nZXI= in the URL window will display "Hello stranger" on the webpage. Issue: When attempting to use this method in the Web Browser of the Visualization toolbox, the content does not display as expected. Instead, it shows the error:'Navigation to the webpage was canceled.'. Request: I seek guidance on how to resolve this issue so that the Web Browser in the Visualization toolbox correctly interprets and displays the data URI content. Alternative Solution Welcomed: Or, if it is possible to directly use Codesys Structured Text (ST) variables within an HTML page, this approach would also meet my requirements. Thank you for your attention.
Last updated: 2024-07-30

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