Post by reinier-geers on Network variable stops sending ^{CODESYS Forge talk (Post)}
Thanks. but ive got unique identifiers. and i dont save to a file.
Last updated: 2026-04-28

Post by husarz17 on Pi as Modbus TCP slave. Errors ^{CODESYS Forge talk (Post)}
Hi, I have similar issue. Is that possible to use more than 4096 registers with Modbus RTU slave?
Last updated: 2026-04-29

Pi as Modbus TCP slave. Errors ^{CODESYS Forge talk (Thread)}
Pi as Modbus TCP slave. Errors
Last updated: 2026-04-29

Deploy Codesys Control SL to a 'secure' device ^{CODESYS Forge talk (Thread)}
Deploy Codesys Control SL to a 'secure' device
Last updated: 2026-05-01

Post by timvh on USB Game Controller with Raspberry Pi ^{CODESYS Forge talk (Post)}
I'm not sure it will work, but you could try it with the CmpCharDevice library. You could create a function block that looks something like this: As input for the filename, you have to use your Linux device, e.g.: '/dev/input/event0' '/dev/input/by-path/platform-button@23-event' Off course you must also pass the pointer to the memory where the data can be written to and the size (count in number of bytes) of the buffer. FUNCTION_BLOCK FB_CharDevice VAR_INPUT szFilename: STRING; pbyBuffer : POINTER TO BYTE; udCount : UDINT; END_VAR VAR_OUTPUT iState : INT := 0; nrBytesRead : DINT; END_VAR VAR xInit : BOOL := TRUE; dFlags: DINT := CmpCharDevice.ACCESS_MODE.O_RDONLY + DINT#4000; // see details for flags: http://linux.die.net/man/2/open, + DINT#4000 is for non-blocking hDevice: CmpCharDevice.CmpCharDevice_Implementation.RTS_IEC_HANDLE := -1; Result : CmpCharDevice.CmpCharDevice_Implementation.RTS_IEC_RESULT; END_VAR IF xInit THEN hDevice := CmpCharDevice.CDOpen(szFilename, dFlags ,Result); // if it would not succeed, the result is -1 (Invalid handle) IF hDevice <> 16#FFFFFFFF AND Result = 0 THEN iState := 5; END_IF xInit := FALSE; END_IF IF iState = 5 THEN nrBytesRead := CmpCharDevice.CDRead(hDevice, pbyBuffer, udCount, Result); ELSE nrBytesRead := 0; END_IF Make sure you close the connection properly, maybe by overwriting the default FB_Exit method of the FB: // Clean up device IF hDevice <> 16#FFFFFFFF THEN __TRY CmpCharDevice.CDClose(hDevice,Result); __CATCH ; __ENDTRY iState := 0; END_IF
Last updated: 2026-05-01

Post by ph0010421 on Deploy Codesys Control SL to a 'secure' device ^{CODESYS Forge talk (Post)}
Hello I'm trying to get Codesys onto a 'Secure' edge device (Linux) The device doesn't support 'sudo' so the connection doesn't complete properly. Is this the same as not allowing root access? Anyway, the screen shot shows where I am. What options do I have?
Last updated: 2026-05-01

Post by pra83 on CODESYS SoftRedundancy — Both PLCs stay standalone after network interruption — Auto recovery not working ^{CODESYS Forge talk (Post)}
Hello, We are facing a critical issue with CODESYS SoftRedundancy that we have been unable to resolve despite extensive troubleshooting. HARDWARE: 2× HP EliteDesk 800 G9 SFF Intel Core i7-14700 (20 cores) 16GB RAM, 512GB NVMe SSD Windows 11 IoT Enterprise LTSC 2024 NIC1: Built-in Intel GbE NIC2: Intel I210-T1 PCIe (NIC team) SOFTWARE: CODESYS Control Win V3 - x64 Version 3.5.22.10 CODESYS SoftRedundancy SL Server 1 IP: 172.10.10.101 (PLC1 — Active) Server 2 IP: 172.10.10.102 (PLC2 — Standby) CURRENT CODESYSControl.cfg: [CmpRedundancy] BootupWaitTime=120000 StandbyWaitTime=12100 SynchronousTimeout=12100 [CmpSchedule] ProcessorLoad.Maximum=80 WatchdogTime=12000 WatchdogTimeoutAction=0 CONFIRMED WORKING: PLC1/PLC2 identification configured via IDE Connection IP configured via IDE AutoSync enabled and written via IDE Normal Active/Standby operation working Server 2 auto-promotes when Server 1 completely fails PROBLEM DESCRIPTION: When NIC1 cable is removed from Server 1 — both servers go to standalone mode. When NIC1 cable is reconnected — both servers remain in standalone indefinitely. Neither server auto-recovers to Active/Standby without manual CODESYS service restart. AutoSync fires (!!! Autosync !!! visible in log) but recovery does not complete. Tested with direct cable (no NIC team) — same result. Confirmed not a hardware or NIC teaming issue. KEY LOG MESSAGES: "Timeout: No sync message RMSG_StartCycle (5) from master: Standalone" "Socket on other side closed gracefully 0" "Standby PLC: Open acyclic work socket failed" "Connection broke after 11806ms. Check BootupWaitTime." Autosync(fires but does not complete recovery) PCAP ANALYSIS (Wireshark): CODESYS sync stops completely at T+3s Server 1 sends TCP FIN on ports 1206 and 1208 at T+5s No CODESYS redundancy traffic for remaining 24 seconds Both servers stay standalone indefinitely WHAT WE HAVE TRIED: StandbyWaitTime = 12100ms SynchronousTimeout = 12100ms WatchdogTime = 12000ms (less than StandbyWaitTime) AutoSync enabled NIC2 set as Standby adapter Disabled Windows Network Discovery Direct cable test — rules out NIC hardware QUESTION: Per official CODESYS documentation: "No automatic Reconnect is included in the functional scope of the redundancy components. You can program the triggering of a reconnect." Is RDCY.Synchronize() the correct function to add to our application for automatic recovery after both PLCs go standalone? What is preventing auto-recovery when AutoSync is enabled and PlcIdent is correctly set? Thank you for your support.
Last updated: 2026-05-02

Post by malie on Issue with library updates ^{CODESYS Forge talk (Post)}
I just tried with version 3.5.22.1 and librarys updates often aren't recognized, usually not. Same behavior like 3.5.21. To describe my workflow: one IDE is used to test librarys as project and two or more IDEs to edit librarys. With only two open IDEs there is no problem, the problem began with more than two open IDEs.
Last updated: 2026-05-04

Post by gseidel on Mismatch between coordinate monitor and actual motion using SMC_GroupJog2, MC_MoveLinearAbsolute (6DOF) ^{CODESYS Forge talk (Post)}
Hi darwin03, when all joints are 0°, then the 6-axis robot is in a so called singularity. This means that it is in a special position where it cannot move freely in all directions but is restricted by its own construction. For a simple example, imagine a scara robot where the arm is fully stretched. In this position it cannot move freely. You can find a lot of information about robot configurations in the www. As far as CODESYS SoftMotion Robotics is concerned, this page holds the most important links, look for the error SMC_CP_CONFIGS_DIFFER: https://content.helpme-codesys.com/en/CODESYS%20SoftMotion/_sm_robotics_errors.html The most important rules: 1) CP movements (linear moves, circular moves, cartesian jogging) cannot change the configuration during the movement. Both start- and endpoint must be in the same configuration. This excludes also the edge case that one or both of them are in a singularity. 2) PTP movements can move through singularities and cross configurations without problems. 3) SMC_SetKinConfiguration can be used to set the configuration of the axis group. Regards, Georg
Last updated: 2026-05-04

Mismatch between coordinate monitor and actual motion using SMC_GroupJog2, MC_MoveLinearAbsolute (6DOF) ^{CODESYS Forge talk (Thread)}
Mismatch between coordinate monitor and actual motion using SMC_GroupJog2, MC_MoveLinearAbsolute (6DOF)
Last updated: 2026-05-04

draw 1000 nails the easy way ^{CODESYS Forge talk (Thread)}
draw 1000 nails the easy way
Last updated: 2026-05-06

Post by reinier-geers on draw 1000 nails the easy way ^{CODESYS Forge talk (Post)}
Because codesys dont has a draw command like Circle in Qbasic ( 20 years ago ) i want to draw 1000 nails, and then move them in the screen when they needed. I dont know if codesys can handle this. But is ther an easy way to draw 1000 nails with every single one has a pointer for movement, color and invisable. Of is there a linux command to draw a circle so i can do it with a process command
Last updated: 2026-05-06

Post by reinier-geers on Network variable stops sending ^{CODESYS Forge talk (Post)}
What version. 20.5 ? ive got also problems wiyth that version. Online change, it hangs itself after one hour. Then one project can problems. Ive change display with 21.0 . At home i turned on the 20.5 display. After 1 hour i goes to stop.
Last updated: 2026-05-06

Post by eschwellinger on V3.5 SP22 Patch1 ^{CODESYS Forge talk (Post)}
I would suggest to send the projectarchive to the CODESYS support.
Last updated: 2026-05-06

Post by ph0010421 on Network variable stops sending ^{CODESYS Forge talk (Post)}
SP21...yes, Online change definitely causes a problem aswell.
Last updated: 2026-05-07

Network variable stops sending ^{CODESYS Forge talk (Thread)}
Network variable stops sending
Last updated: 2026-05-07

Post by osande on V3.5 SP22 Patch1 ^{CODESYS Forge talk (Post)}
Can do. Suspect Visualizations as alarm colours disappear during upgrade, and some error messages related to trend/trace that are impossible to track down...
Last updated: 2026-05-08

V3.5 SP22 Patch1 ^{CODESYS Forge talk (Thread)}
V3.5 SP22 Patch1
Last updated: 2026-05-08

Post by suyash on Device User Logon ^{CODESYS Forge talk (Post)}
Hello. Basic Info : I am using Codesys Control For Raspberry Pi SL. Version 4.4.0.0 Engineering version : CODESYS V3.5 SP19 Patch 1 (Its a old application) I am facing a difficulty with the "Device User Logon". The window (screenshot attached) pops up during login. When i enter the credentials (which i feel are correct), the windows pops up again no matter how many times I enter. To ascertain, I tried entering the incorrect credentials during which its clearly specifying that i have entered them incorrectly (which is why I am quite certain about the credentials being correct). I even tried going into Communication Settings > Device(drop down) > Change Runtime secuirity policy . However it again asks me for credentials which keep popping up again and again. I am thinking of upgrading the runtime to the latest version of 4.20 Will it cause any issues with the paid license? Please suggest me a solution. BR, Suyash
Last updated: 2026-05-13

Post by gordonkeller360 on Equal Objects at Unstaged Changes - Git (Codesys Pro) ^{CODESYS Forge talk (Post)}
Hi -- curious to know the same thing! Lots of "The objects are equal" randomly popping up... my solution (for now) is simply to commit the actual changes and then execute the rollback (git clean + checkout) on all that are giving me the issue in question. Does anyone know if this repairable?
Last updated: 2026-05-14

Equal Objects at Unstaged Changes - Git (Codesys Pro) ^{CODESYS Forge talk (Thread)}
Equal Objects at Unstaged Changes - Git (Codesys Pro)
Last updated: 2026-05-14

Tips for Choosing Expert GMAT Test Helpers for Study Support ^{CODESYS Forge talk (Thread)}
Tips for Choosing Expert GMAT Test Helpers for Study Support
Last updated: 6 days ago

ReadWriteEEprom FB question ^{CODESYS Forge talk (Thread)}
ReadWriteEEprom FB question
Last updated: 4 days ago

Post by kurt9 on ReadWriteEEprom FB question ^{CODESYS Forge talk (Post)}
I want to programmatically write the alias address to a new EtherCAT slave when I plug it into my IPC EtherCAT network. I am looking at the ReadWriteEEprom FB and see that one of the elements is "pbyData". which is the pointer to byte that is usually set to 2048 bytes. Since I am setting the alias address to the EEprom only (EEprom address 16#0012), I would assume that what I am writing is 2 bytes only. Does the pbyData have to be specified as ADR(myArray) where "myArray" is the 2 bytes of the alias address? How is the best way to set this element of the function block? Thanks in advance
Last updated: 4 days ago

Post by nulltrace on PM556-TP-ETH — How to change IP address without overwriting the PLC program? ^{CODESYS Forge talk (Post)}
Depending on the Project, the used Communication-Protocol's, the way how the System was designed, there are some Options if you can answer these Question properly The Question is: are you able to connect to the Shell / Systemprompt of this PLC with administrative Rights?
Last updated: 3 days ago

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