Post by matthew on New Ladder Diagram conversion does not work due to missing features ^{CODESYS Forge talk (Post)}
Hi @eschwellinger Just wondering if there is any update when the Expression or part of it has no effect will be fixed? Also have the ability to open an FB when online and offline. It would also be great to be able to view the ST code block when online.
Last updated: 2024-05-14

Post by mani-i4point0 on CODESYS Development System V3 ( 3.5.19.70 ) on Windows Virtual Machine ^{CODESYS Forge talk (Post)}
Hi, I have a requirement where in need to install a CODESYS Development System V3 ( 3.5.19.70 ) on a Window 10 which is running in VM. Is there any limitation of functions and features of using CODESYS Development System V3 ( 3.5.19.70 ) installed in Window 10 which is running in VM. Please do advice. Best Regards, Mani
Last updated: 2024-05-14

Post by mani-i4point0 on CODESYS Development System V3 ( 3.5.19.70 ) on Windows Virtual Machine ^{CODESYS Forge talk (Post)}
Hi, I have a requirement where in need to install a CODESYS Development System V3 ( 3.5.19.70 ) on a Window 10 which is running in VM. Is there any limitation of functions and features of using CODESYS Development System V3 ( 3.5.19.70 ) installed in Window 10 which is running in VM. Please do advice. Best Regards, Mani
Last updated: 2024-05-14

Post by xiaoyan on Generic EtherCAT slave ^{CODESYS Forge talk (Post)}
Hello Well i need some basic advice. My protegoD drive is shown deactivated in the device tree. i can see its variables and other i/o in online mode but the device itself is deactivated. how can i address this issue. is there any configuration error.using ethercat link to connect to protegoD by Primo MC plc
Last updated: 2024-05-16

Post by mgengler on Recipe Manager - Not Creating Recipe Files ^{CODESYS Forge talk (Post)}
Thanks for info... However, I changed the directory to: C:\ProgramData\CODESYS\CODESYSControlWinV3x64\58719825\PlcLogic\Recipes It still displays the content of this folder OK, however still will not write or read files. Is this the PLCLogic area you speak of? I also tried adding this path the the CodesysControl.cfg file. But still can't get it to work. Any additional direction would be appreciated!
Last updated: 2024-05-20

Post by rd76065 on Opto 22 Groov PR2 Modbus TCP Master communication ^{CODESYS Forge talk (Post)}
Previously, I have used ModbusEthernet_04 library for Wago for ModbusTCP Master communicational in Codesys V2.3. How to use same communication of similar UDT for Opto22 Groov PR2 PLC in Codesys V3.5 SP20. Can I use OSCAT library - Network -MB_Client or IODrvModbusTCP - ModbusRequest for this requirement? If any other please guide.
Last updated: 2024-05-31

Post by davidmic on Is it possible to profile builds? ^{CODESYS Forge talk (Post)}
Hi I have a large project (which I can't share here), builds take multiple minutes. My computer is reasonably new (i7-10610U, 32gb ram), and I don't think my company will let me upgrade. Is there any way to profile/inspect the build process? My goal is to figure out why builds take so long, then hopefully I can make them faster.
Last updated: 2024-06-05

Post by davidmic on Is it possible to profile builds? ^{CODESYS Forge talk (Post)}
Hi I have a large project (which I can't share here), builds take multiple minutes. My computer is reasonably new (i7-10610U, 32gb ram), and I don't think my company will let me upgrade. Is there any way to profile/inspect the build process? My goal is to figure out why builds take so long, then hopefully I can make them faster.
Last updated: 2024-06-05

Post by kumareasu on Persistent variable storage ^{CODESYS Forge talk (Post)}
Is there any function function block which can store the persistent variable in HDD/SSD immediatley. My observation is that the persistent variable is getting stored when we shut down or restart the system (Windows+ CoDeSys RTE SL ). the persistent variables are not stored in HDD/SSD, if I power off the system without proper shutdown. Seeking your feedback.
Last updated: 2024-06-12

Post by kuegerls on SysProcessExecuteCommand2 and CANopen Device ^{CODESYS Forge talk (Post)}
I have now conducted some tests. The problem occurs when the Python script establishes an OPCUA connection, even if I only establish the connection without reading or writing any data. Is there another way to exchange data between Python and CODESYS without having to put in a lot of effort?
Last updated: 2024-06-24

Post by xabier on License Activation Problems ^{CODESYS Forge talk (Post)}
I bought two license and install with out problems....but the problem was when i changed the image in my controler and when i want activated again the license i have a problem Appear this 2 softcontainer and i can´t install any license again... Can someone help me please?
Last updated: 2024-06-24

Post by koppit on SysComRead Timeout Parameter ^{CODESYS Forge talk (Post)}
Im using SysCom ver. 3.5.17.0 and seem to have the same issue on a Raspberry Pi. It's not waiting for the requested number of bytes, no matter if "ulTimeout := SYS_INFINITE" or any other value. The only solution I have found is to stall the program to allow the serial port to recieve the data.
Last updated: 2024-06-26

Post by snguyen on Any ways to prevent Infinite scroll when moving an object to the left or top edge? ^{CODESYS Forge talk (Post)}
I've been making few HMIs and I'm starting to get annoyed that whenever I try to align an object to the left or top side of the frame, it quickly scrolls into that direction infinitely. Is there a way to prevent that?
Last updated: 2025-10-24

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 kalmeyer on Stepper motor control with (SM_Drive_RaspStepper_direct) ^{CODESYS Forge talk (Post)}
I AM VERY GRATEFUL FOR YOUR HELP. I HAVE INSTALLED: CODESYS SOFTMOTION VER. 4.19.0.0 AS SEEN IN THE ATTACHED FILE. BUT IT DOESN'T CHANGE THE FACT THAT I GET 6 ERRORS WHEN I HAVE INSTALLED SM_Drive_RaspiStepper_Direct DO YOU HAVE ANY SUGGESTIONS ON WHAT I CAN DO NOW? /KLAUS
Last updated: 2025-11-10

Post by scrisp on Source code changes since last download ^{CODESYS Forge talk (Post)}
Why does CODESYS 3.5 show the message “Source code changes since last download” even though I did not create or modify any new variables? When I go online with the PLC, it detects changes and suggests synchronizing, but nothing was actually changed in the project. What could cause this and how can I fix it?
Last updated: 2025-11-28

Post by michaelhepiroc on CIA405.RECV_EMCY ^{CODESYS Forge talk (Post)}
Hi Reinier, I'm wondering if you managed to get this FB to work? I was just trying it, and found it not to work, I get an EMCY message in the CodeSys program under the Device Status, but the FB doesn't pick up any EMCY messages from the Bus. Cheers.
Last updated: 2025-12-08

Post by gatto on warning C0195 ^{CODESYS Forge talk (Post)}
Good morning dear codesys users. I'm using 3.5.20.40 and I get this warning C0195 when I assign an initial value to xyz. However, if I do it on a single byte (abc), it doesn't display any warning. Why? VAR_GLOBAL abc : BYTE := 100 ; xyz : ARRAY [1..10] OF BYTE := [10(100)] ; END_VAR
Last updated: 2025-11-20

Post by malie on Codesys 3.5.21.3 add Library search not work ^{CODESYS Forge talk (Post)}
Hello, i am not getting any results in add library. On 3.5.19.7 i got results. I tried on different machines on windows 10 and windows 11. Repair install and complete new install of codesys 3.5.21.3 dose not help. I can select and import libraries, that work. What am i doing wrong? That has always worked flawless till 3.5.21.3.
Last updated: 2026-01-20

Post by yoeri on Python Scripted Save_Archive with noUI ^{CODESYS Forge talk (Post)}
Is there any update on this? Running codesys 3.5.19.70 proj = projects.open(project_path, primary=True, update_flags=flags) This gives an error only when using --noUI exception System.NullReferenceException: Traceback (most recent call last): File "C:\Project\ci\build.py", line 14, in <module> SystemError: Object reference not set to an instance of an object. Exit code: 1</module>
Last updated: 2026-01-30

Post by peteryapab on Login Screen to small for 10" screens ^{CODESYS Forge talk (Post)}
Hi! I hade made a visualization within Codesys V3.5 SP21 Patch 3, where i call for the user management and login. The VisuUserManagement.VMU_Login and VisuUserManagement.VMU_Login2 are to small for the screen it looks good and works fine if you are on a computer with large scrren but gets finicky on the smaller screen. any ide´s how to make the login dialog bigger?
Last updated: 2026-02-01

Post by mikek10 on Ethernet/IP 4.6.0 causing exceptions? ^{CODESYS Forge talk (Post)}
Hi, I have a project currently in development, it has a number of Ethernet/IP devices (18 adapter devices with Codesys as scanner, another scanner device with codesys as adapter). This has been stable whilst on factory floor for several months (though prior to that I did have some Ethernet/IP issues which were resolved by adjusting RPI rates). Today I tried updating to Ethernet /IP 4.6.0 from 4.5.1, subsequent to this I had 2 exceptions in a 2 hour period, I reverted to 4.5.1 and have had no further exceptions. Note I do have a device (Zebra printer) that frequently times out and reconnects, this does not seem to cause any issues in operation and does not cause any exceptions with 4.5.1. I believe the root cause of this is on the Zebra side, however there does not seem to be any adjustment I can make to prevent the time outs. Information from device log is in screenshot attached.
Last updated: 2024-06-27

Post by abinvest579 on TCP Client ^{CODESYS Forge talk (Post)}
Hi All, I am using codesys based plc to read and control magna power DC supply over LXI protocol using SCPI command. To connect device required socket programming for that i am using Net base service library function block TCP_Client to establish connection over TCP/IP , TCP_Write to write SCPI commands and TCP_Read to read data from Magna power DC supply. I have attached screenshot for logic developed. I am able to connect and write commands to device but i not receiving any information from device. For writing Commands i also tried various end of line character like \n,<nl>, A, D, 10, 13, 0x0A, 0x0D but not received any status from device. For testing purpose i am using simple command '*IDN?' to read data. Also if tried to check on hercules software what data actually plc read, first it read correct data after that is read wrong data as see in screen shot. 'Hello World' was correct read and after that Codesys in replaced with 'Codesysorld' that is not correct way. Same issue also appeared for send data. Any one have face same issue how i can read data directly from device correctly and send data please suggest solution on this.</nl>
Last updated: 2024-07-01

Post by gunstr on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge talk (Post)}
We have been using the Codesys Control for Rasberry Pi for several years in many installations without any major issues. But during summer the problem mentioned above has blocked further deliveries. We have made some minor upgrades to the application but I do not really see why that should have any impact. HW is Raspberry Pi 4B, 2GB OS is Booworm Lite Codesys control is version 4.15 (have just installed a few systems lately with this version) The system boots OK but after exactly 30 seconds Codesys is shut down and becomes unreachable. We have tested several different combinations: Upgrade of the Codeys Control to 4.16 Loading different Codesys applications Changing to 4GB version of the Raspberry Pi One of the test applications together with the 4GB HW seems to be stable, but all other combinations fails. Any suggestion what we can do to resolve is appreciated - this is a real business blocker now. Rgds
Last updated: 2025-09-02

Post by toby on Ethernet/IP communication with Omron NX1P2 ^{CODESYS Forge talk (Post)}
Hey guys, I'm very much a noob with networking, it's my achillies heel, and this is my first networking project using Ethernet/IP. Any help offered is GREATLY appreciated. I'm trying to network a Codesys Project with an Omron NX1P2 PLC. I'm using EIP due to hardware restrains. I've added the fieldbus, EIP scanner (as the master), and made a Network Variable List. On the Sysmac Studio end, I've made the variables and set them to network inputs/outputs, registered them in EIP settings, but when I try to set the target device (the Codesys project), I suspect I need to import an EDS file for the EIP mapping. Back in the Codesys project, I'm not sure how to: - Make an EDS file to share with Sysmac Studio - How to link the target device (Omron PLC) to the EIP fieldbus - How to map the inputs from the Omron PLC. Im sorry for my very open request for help, i'm kind of lost looking through the various forums/video/tutorials as many of them dont match what im trying to do. Any help, or sample programs would be so so greatly appreciated. If you need any further clarifications, please feel free to ask. Thanks in advance, Toby
Last updated: 2024-01-24

Sort by relevance or date