Post by lzml on Safety ^{CODESYS Forge talk (Post)}
I have a problem with a project that uses EtherCAT Safety. The project is developed with CODESYS version 3.5.19.20, runtime 3.5.18.30, safety CPU EL6900 4.3.1.0, TCEL6900FBS 3.5.1.10, IODrvEL6900 4.3.1.0, IODrvEtherCAT 4.1.0.0. The safety project works correctly, but when I download the PLC project for modifications, the ESM objects are no longer aligned with the states inside the safety program. Specifically, inside the safety program, they are seen as true, while outside the safety program, the state is reported as false, but not for all ESMs, only some. I have already tried to completely redo the safety from scratch, but nothing has changed. Any solutions? Thanks
Last updated: 2024-05-24

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 zer0g on Modbus Client Request Not Processed ^{CODESYS Forge talk (Post)}
I'm using the code bellow which is based on the Codesys example: FUNCTION_BLOCK MODBUS_master_example_ST VAR initDone : BOOL := FALSE; aIPAddress : ARRAY [0..3] OF BYTE := [127,0,0,1]; clientTcp: ModbusFB.ClientTcp; // buffer to read input registers aDataInputRegisters : ARRAY[0..9] OF UINT; // some client requests clientRequestReadInputRegisters: ModbusFB.ClientRequestReadInputRegisters; xExecute: BOOL; END_VAR IF NOT initDone THEN initDone := TRUE; // configure clientTcp clientTcp(aIPaddr:=aIPAddress, uiPort:=502, udiLogOptions := ModbusFB.LoggingOptions.All); // configure clientRequestReadInputRegisters clientRequestReadInputRegisters(rClient:=clientTcp, uiUnitId:=1, udiTimeout:=TO_UDINT(T#1000MS)); END_IF // call the client FB's clientTcp(); clientRequestReadInputRegisters(rClient:=clientTcp,xExecute := xExecute AND NOT clientRequestReadInputRegisters.xBusy ,uiStartItem:=2, uiQuantity:=3, pData:=ADR(aDataInputRegisters[0])); As you can see the clientTCP is called cyclically with the same result.
Last updated: 2024-05-30

Post by spice on WebVisu Recipe Save/Load ^{CODESYS Forge talk (Post)}
I'm currently reworking the controls on a cnc press brake and wanted to load various recipes as programs to run. I'm using a 2d array of REALs to store the X and Y coordinates as well as some other program parameters in a recipe. I'd like to store all of the recipes on a computer used as the HMI that way the text files can be edited and uploaded offline. I'm using Automation Directs P2CDS-622 Can this be done through webvisu? If not would a license for Codesys HMI SL on the computer allow me to accomplish this? I've attached the Project File Thanks, Spice
Last updated: 2024-05-31

Post by ragarcia on How to change login visualization for other visualization after user logged in ^{CODESYS Forge talk (Post)}
Hello everyone, I have a web visualization on Codesys and to be able to use the web visualization first an user and a password is requested. After the user logged in, I want to automatically change the visualization to the 'Home' visualization but I am not sure how to do this. In the login visualization I basically have a button with the input configuration to execute the action 'Login' after a click. Once the user is logged in, the visualization is still stuck in the login page and I want to automatically change to Home visualization if the user was succesfully logged in. How can I know the number of web visualization clients connected to my PLC? Thanks in advance
Last updated: 2024-06-04

Post by adaffern on Runtime on Raspberry pi5 stops after 15 seconds ^{CODESYS Forge talk (Post)}
Hi Guys, I'm new to CODESYS on the pi and I'm struggling to get it working. My issue is that the runtime keeps stopping after approximately 15 seconds. I have installed the runtime package 4.11.0.0 on the pi, trying on both a 64 bit and 32 bit OS. Looking at old forums it all references the 4B and the fact they used 32 bit Debian bullseye (the last version of raspberry pi os) however the pi 5 doesn't offer this version when I try select it in the imager. Has anyone managed to get running using the pi 5? Any help would be greatly appreciated. Thanks, Adam
Last updated: 2024-06-10

Post by fajean on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge talk (Post)}
4.11 appears to solve the problem. Thanks for your help. I had first installed the 64-bit version of RPiOS, but looking at various posts and the product's page on the store which only lists 32-bit compatibility, I downgraded to the 32-bit version. I did this before trying 4.11, and it did not solve the problem. Thus my working system is 32-bit, and I am wondering if I can go back to 64-bit or not. An 64-bit OS is not listed as compatible on the store's web page, but when installing there actually is a 64-bit version listed (automatically chosen when installing on 64-bit, but otherwise greyed out). Is 64-bit supported and the website is out-of-date, or is that some kind of work-in-progress?
Last updated: 2024-06-13

Post by matt-purcell on Which Lib to use, connect to a socket with URL instead of IP address ^{CODESYS Forge talk (Post)}
Hello, I have a new project and I need to connect to a TCP socket using the URL instead of an explicit IP address, myendpoint@mydomain.com Which library is best suited for this? This is for a new enterprise project, the endpoint is a server in a datacenter running some real time application. We have big IP, it will automatically reassign the IP address to the backup server if a crash occurs so an explicit IP won't work for me. I've done this in RS logix, working now to migrate that code over to codesys. Thanks in advance!
Last updated: 2024-06-17

Post by timothyzalusky on Strange Behavior on Raspberry Pi ^{CODESYS Forge talk (Post)}
Hello, I am seeing some weird runtime behavior related to the EQ function on a rapsberry pi based system. I have attached a screenshot showing the strange latching I am seeing on the EQ function, and I have not seen this behavior before. I tried freshly restarting the runtime and it has this same behavior. Anyone seen this? I am on 3.5.20 with the latest runtime installed. Basically, as soon as it hits one of those EQ's in the program, it latches effectively locking the output on. Any input from the Codesys team would be appreciated as well as anyone that might know what I am seeing.
Last updated: 2024-06-18

Post by kuegerls on SysProcessExecuteCommand2 and CANopen Device ^{CODESYS Forge talk (Post)}
Hello, CODESYS Control is running on my RevPi, and my system communicates over a CANbus with a master using the ConnectCan module (Slave - CANopen Device). The communication works perfectly fine so far. However, as soon as I call a Python script with "SysProcessExecuteCommand2" that creates a CSV file and executes without errors, the master does not adopt any changes to the Transmission Process Data Objects (TPDOs). I don't quite understand what one has to do with the other, and perhaps someone can help me with this. Here is my script call: SysProcess.SysProcessExecuteCommand2(pszCommand:='python /home/pi/test.py', pszStdOut:=sCMDOutput, udiStdOutLen:= SIZEOF(sCMDOutput), pResult := ADR(eResult)); Thank you in advance! Best regards, Stefan
Last updated: 2024-06-20

Post by rohan on Child Application Alarm ^{CODESYS Forge talk (Post)}
Hi All, I'm trying to develop a multi-application project that allows me to switch between applications. I currently have a parent application and several child applications, as this is the only way for them to share CAN/Ethernet communication. I've noticed that I am only able to create an Alarm Configuration for the parent application. But the children application do not seem to be displaying alarms on the Alarm Table in the visualisation for when an alarm is raised. Does anyone know of a fix, solution or a way around this? I am utilising Codesys v3.5 SP16 Patch 5 64Bit
Last updated: 2024-06-21

Post by etalp on Eaton XC303 firmware update via USB ^{CODESYS Forge talk (Post)}
Hi, I'm struggling with updating my xc303 to firmware 3.5.17. It is possible only via USB port. I've installed proper update files on the USB then plug it into the PLC's USB port and restarted the device. Shortly after LED's on the PLC started to blink, so updating process has started. But after 10 minutes the PLC LED turned off and after all I could't serach for this PLC in Codesys, but could ping it. Could someone eplain to me proper procedure of updating the fimrware in XC303 via USB? Is it neccesary to STOP the PLC switch after pluging the USB?
Last updated: 2025-10-15

Post by imdatatas on Unrecoverable SoftMotion state after switch to PreOp ^{CODESYS Forge talk (Post)}
Dear @alimans, Additionally, As far as I know since starting from Softmotion V4.18.0.0 automatic restart behaviour for an axis has been changed for this issue. See below explanation from release notes. "With CODESYS SoftMotion 4.18.0.0, the behavior of SoftMotion axes after a loss of communication to the servo drive has changed. Now, an automatic reinitialization is performed as soon as the communication is established again. Before, an explicit call to SMC3_ReinitDrive had to be performed. An example for a loss of communication is that the cable to one of the drives is unplugged." Regards, imdatatas
Last updated: 2025-10-23

Post by fari on Configure J1939 I/O Mapping via Scripting ^{CODESYS Forge talk (Post)}
Hi everyone, With the latest version of Codesys, it’s now possible to import DBC files directly into the J1939 Manager, which is great. However, I’m trying to achieve the same thing programmatically and can’t find any scripting functions related to import_dbc or any host_parameter that would let me configure PGNs and signal mappings automatically. So far, I’ve managed to add the J1939 Manager and an ECU, and I can pass the DBC database to it, but I’m stuck when it comes to adding the signals. Has anyone figured out if this can be done through scripting? (Attached is an illustration of what I am trying to accomplish programmatically). Thanks in advance.
Last updated: 2025-10-24

Post by uluking on CodeSys2.3 Modbus 64-Bit Double Read Problem ^{CODESYS Forge talk (Post)}
Hi everyone, I would appreciate your help with a problem I've been working on for a few days but haven't been able to resolve. I am reading data from a Siemens PAC3220 energy analyzer using Modbus with Wago-8202. However, the device's energy indices are given as doubles. Since a double variable is 64-bit, it is not possible to read it directly. I have been struggling for days, I have written many conversion functions but I have not been able to get results. I would appreciate your help. I read 4 word variables and processed them. I am converting them according to IEEE-754, but I can't seem to read the correct data. I would appreciate your help.
Last updated: 2025-10-27

Post by davidbo on How to stop dhcpcd and use SysSockSetIpAddressAndNetMask to set address? ^{CODESYS Forge talk (Post)}
It is stated: "Dynamic ip address, provided by DHCP, BOOTP, etc. Cannot be changed by SysSockSetIpAddressAndNetMask()" Therefore I try to stop dhcpcd and flush the eth0 like this VAR CONSTANT flushIP:STRING:='sudo ip addr flush dev eth0'; stopDHCP:STRING:='sudo systemctl stop dhcpcd'; END_VAR SysProcessExecuteCommand2(pszCommand:=stopDHCP, pszStdOut:=stdout,udiStdOutLen:= SIZEOF(stdout),pResult := ADR(Result)); SysProcessExecuteCommand2(pszCommand:=flushIP, pszStdOut:=stdout,udiStdOutLen:= SIZEOF(stdout),pResult := ADR(Result)); Besides losing the connection when flush occurs the CODESYS halts, seen on the display and I cannot see why, because I have lost the connection from my IDE. Why does the flush command halt the execution of the application?
Last updated: 2025-11-04

Post by davidbo on RETAIN PERSISTENT only stored at gracefully shutdown? ^{CODESYS Forge talk (Post)}
I have {attribute 'checksumnoinit_override' := '2629838988'} {attribute 'init_related_code' := '5c6efcf8-e0f4-4166-a9fa-17eadd8908df'} VAR_GLOBAL RETAIN PERSISTENT {attribute 'order_in_persistent_editor' := '0'} segmentValue: ARRAY[0..49] OF REAL; {attribute 'order_in_persistent_editor' := '1'} segmentTime: ARRAY[0..49] OF REAL; // Generated instance path of persistent variable PRG.test: INT; // Generated instance path of persistent variable PRG.nw_storage: SysSocket_Implementation.SysSocket_Interfaces.SOCK_ADAPTER_INFORMATION2; END_VAR When I have changed PRG.nw_storage it will not be stored at a power off, but if I do a: sudo systemctl restart codesycontrol and then a power off it will be stored. Is there a way to store persistent variables without a restart of codesyscontrol? Can anyone explain how and when CODESYS store persistent variables?
Last updated: 2025-11-17

Post by msirotkin on EtherCAT status errors ^{CODESYS Forge talk (Post)}
Hello, I'm trying to understand the reason for the many errors on the EtherCAT master status page. If we set the cycletime to 1ms we see a lot of rxerrors and lostframes, but the send and recive times are quite good (see attachement). And the status of the EtherCAT bus is good (no other errors, all is green, slave has no errors) But when we set 2ms cycletime the lostframe errors are gone, but periodically increses rxerror counter (see attachement). The questions is, what do these errors actually mean and what we can do to get gid of them? Linux RT, imx8, Codesys runtime for ARM 3.5.21.10, Ethercat 4.10 Thanks
Last updated: 2025-11-25

Post by mr-ege on Error: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr ^{CODESYS Forge talk (Post)}
Hi all! I'm trying to learn PLC Programing. Today I was making a simple PLC program, as you can see. When I compile the program without the visualization, there are no errors. However, when I add the visualization and then compile it, I get this error. I don’t know how to solve the problem. I have tried the following solutions: rebooting the PC and updating the software. Error Code: C0138: No matching 'FB_Init' method found for instantiation of VisuClientObjectMgr Compile complete -- 1 errors, 0 warnings Build complete -- 1 errors, 0 warnings : No download possible Version: CODESYS V3.5 SP21 Patch 3
Last updated: 2025-11-25

Post by artem1223 on Synaxis of library declarations in the ST ^{CODESYS Forge talk (Post)}
Codesys 3.5 17.30, plc - crevis GN-9373. I need to use RTC of pls for write in registers (need to check difference of writen 100 and 200 registers). For this i try to use SysTimeRtc (SysTimeRtc.SysTimeRtcGet) but its not working. After it i tryed to use SysTimeGetMs and something like this but still not working. Library? Mb but check project, SysTime with SysTimeRtc already, all what i know - already is here. Its my first try to learn ST (early used fbd and ladder, yeah), pls help with it. Mb problem with a syntaxis, but im not sure.
Last updated: 2025-11-26

Post by jbcregen on Accessing parameters from a structure or function block with the web interface ^{CODESYS Forge talk (Post)}
I have a project with hundreds of OPC-UA variables available on the network. A lot of these variables are used actively in various scripts that run in background in the OS (Linux). I'm experimenting with Automation Server and I have a hard time understanding how the web interface populates its parameters list for a given PLC (<plc details="" parameters="" for="" plc="" 'xyz'="">).</plc> In this page, it looks like the only variables available are the ones that are of a "base" type : bool, TIME, String, INT, etc. All the variables that are nested into function blocks or structures are not available in the web interface, even if they are available to any OPC-UA client. Is this a limitation of the Automation Server or is there something that can be done in Codesys?
Last updated: 2025-12-01

Post by tobifenny on Mailversand ^{CODESYS Forge talk (Post)}
Hallo zusammen, ich habe nach einem PC-tausch Probleme mit dem Versenden von Mails. Ich Nutze dazu die die Bibliothek Mail_Service_SL 1.12.0.0. Codesys ist die Version 3.5 SP21 Patch 2. Als Mailserver benutze ich Gmail. Als SMTP habe ich smtp.gmail.com eingetragen und Port 25 oder 465 oder 587 getestet. Connection Typ ist TLS und StartTLS ist true. Wenn ich eine Mail senden will, bekomme ich ein Timeout Fehler. In der Firewall habe ich die Ports alle Freigegeben. Unter Windows 10 hat das auch noch so funktioniert. Mit Windows 11 klappt es nicht mehr. Hat jemand eine Idee, woran das liegen kann?
Last updated: 2025-12-04

Post by mait-tim on Drive communication errors ^{CODESYS Forge talk (Post)}
With a machine I'm working with i get a communication error when I'm updating some softstop limits. As soon as I update the code the drives do not want to operate. Using the MC_readStatus I'm receiving errors as soon as i want to start a movement. Using MC_ReadAxisError i see that i receive error 131, no response. With a SMC3_ETC_ReadParameter_CoE i do not recieve any driver errors. Does anyone know how i can figure out what the error is and how to solve it. When i go back to the old software no errors occur. Im working with a legacy machine running a Beijer PLC with some Mitsubishi drives. running on Codesys 3.5 SP10. the runtime version is probably 3.5.3. The drives are all Ethercat Drives (CoE). All using the SM3_drive_ETC libary and the SM3_basic library.
Last updated: 2025-12-22

Post by ranadheer on Assistance for MQTT configure with external broker (Mosquitto) ^{CODESYS Forge talk (Post)}
Hi everyone Am trying to make establish MQTT connection , where am using IIOT example for this as a demo mode. where i had given IP-address of of local Linux application as a 172.31.239.67 and port number as 1883 in the PLC_PRG itself, and preparing the publish message by manually as " this is from published message", and this should receive at the subscriber side. Aim: To make communicate external publisher to the CODESYS by using MQTT protocol. By any chance having reference documents about this implementation please share here. and suggest the process to make it possible. I had uploaded reference project file after updating address in th PLG_PRG, kindly assist to configure with the broker
Last updated: 2025-12-03

Post by harryc on Soft Container License issue with ARM64 Linux ^{CODESYS Forge talk (Post)}
Hi, We are working to provide our customers with CODESYS operation on our hardware product ( https://elprotech.com/product/el-qe-e-quantum-edge-series/ ). I'm trying to enable a CODESYS license (Soft container) on our product running ARM64 linux. This problem am having looks similar to here: https://forge.codesys.com/forge/talk/Runtime/thread/6d29b6b4de/ and here: https://forge.codesys.com/forge/talk/Runtime/thread/a2d0c63375/; but I am not running docker, and I am not re-installing a license. This is first time install. I have CODESYS Control SL running on my device, as well as CodeMeter. I purchased a license, and installed it to the CODESYS Development system, (Tools >> License Repository) then tried to install to the device (Tools >> License Manager >> o Device >> o Soft container >> Remote [0001] >> OK. This gives me the "License Manager - Overview" dialog, and the message "Licensing info not available. There is no dongle attached to the device." Below shows the running applications, installed packages, and current content of /var/opt/codesys Also attached screenshots of the Development software as I go through the steps to install the license. # # ps | grep -e "code" -e "CodeMeter" 1391 daemon /usr/sbin/CodeMeterLin 1407 root /opt/codesys/bin/codesyscontrol.bin /etc/codesyscontrol/CODESYSControl.cfg 1442 root /opt/codesysedge/bin/codesysedge.bin /etc/codesysedge/Gateway.cfg 29229 root grep -e code -e CodeMeter # dpkg -l Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-==============-=============-============-============================================================================================== ii codemeter-lite 8.20.6539.500 arm64 WIBU CodeMeter minimal runtime ii codesyscontrol 4.14.0.0 arm64 codesyscontrol based on SDK 3.5.20.40 , from Fri Nov 29 08:35:37 CET 2024 [265], Release build ii codesysedge 4.14.0.0 arm64 codesysedge based on SDK 3.5.20.40 , from Fri Nov 29 08:34:19 CET 2024 [265], Release build # ls -la /var/opt/codesys total 208 drwxr-xr-x 6 root root 4096 Nov 7 05:31 . drwxr-xr-x 1 root root 4096 Nov 6 08:33 .. -rw-r--r-- 1 root root 23515 Nov 7 07:26 .Audit.log -rw-r--r-- 1 root root 160 Nov 7 05:31 .GroupDatabase.csv -rw-r--r-- 1 root root 160 Nov 7 04:37 .GroupDatabase.csv_ -rw-r--r-- 1 root root 20736 Nov 29 2024 .SoftContainer_CmRuntime.wbb -rw-r--r-- 1 root root 1982 Nov 29 2024 .UFC_SoftContainer_CmRuntime.WibuCmLif -rw-r--r-- 1 root root 229 Nov 7 04:35 .UserDatabase.csv -rw-r--r-- 1 root root 229 Nov 7 04:35 .UserDatabase.csv_ -rw-r--r-- 1 root root 11807 Nov 7 05:30 .UserMgmtRightsDB.csv drwxr-xr-x 6 root root 4096 Nov 6 08:30 .pki drwxr-xr-x 3 root root 4096 Nov 6 08:30 OPCUAServer drwxr-xr-x 7 root root 4096 Nov 6 08:30 PlcLogic -rw-r--r-- 1 root root 13 Nov 6 08:30 SysFileMap.cfg -rw-r--r-- 1 root root 2640 Nov 29 2024 bacstac.ini drwxr-xr-x 4 root root 4096 Nov 6 08:30 cert -rw-r--r-- 1 root root 94105 Nov 7 07:25 codesyscontrol.log # # uname -a Linux Remote 6.1.22 #5 SMP PREEMPT Tue Nov 18 11:35:46 AEST 2025 aarch64 GNU/Linux #
Last updated: 2025-12-04

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