[OOP] How to implement "HAS A"... that is, instance of class within a class ^{CODESYS Forge talk (Thread)}
[OOP] How to implement "HAS A"... that is, instance of class within a class
Last updated: 2017-06-07

Accessing Webvisu remotely to a Pi with a Cellular USB dongle ^{CODESYS Forge talk (Thread)}
Accessing Webvisu remotely to a Pi with a Cellular USB dongle
Last updated: 2019-08-12

[ Windows ] How to Restart PLC in CMD line ? ( a Stop followed by a Start ) ^{CODESYS Forge talk (Thread)}
[ Windows ] How to Restart PLC in CMD line ? ( a Stop followed by a Start )
Last updated: 2020-03-27

Check if a directory exists and then copy a file in it ^{CODESYS Forge talk (Thread)}
Check if a directory exists and then copy a file in it
Last updated: 2016-06-25

Can't link process data variables to IO from a positionsensor while using a demo soft PLC ^{CODESYS Forge talk (Thread)}
Can't link process data variables to IO from a positionsensor while using a demo soft PLC
Last updated: 2022-03-04

it is possible to add a function template to a program from scripting ... ^{CODESYS Forge talk (Thread)}
it is possible to add a function template to a program from scripting ...
Last updated: 2018-05-25

How can you Toggle a Function BOOL input from a different POU? ^{CODESYS Forge talk (Thread)}
How can you Toggle a Function BOOL input from a different POU?
Last updated: 2021-08-01

Is there a way to assign NaN (i.e., Not a Number) ^{CODESYS Forge talk (Thread)}
Is there a way to assign NaN (i.e., Not a Number)
Last updated: 2019-08-15

Running more controllers in tandem on a single devbox (or a single networked resource) ^{CODESYS Forge talk (Thread)}
Running more controllers in tandem on a single devbox (or a single networked resource)
Last updated: 2017-04-22

How to retrieve a runtime license installed twice within a single computer ? ^{CODESYS Forge talk (Thread)}
How to retrieve a runtime license installed twice within a single computer ?
Last updated: 2020-04-20

Is it possible for a byte to have a negative sign? ^{CODESYS Forge talk (Thread)}
Is it possible for a byte to have a negative sign?
Last updated: 2019-10-31

Cant assign a remote device as an input to a function block ^{CODESYS Forge talk (Thread)}
Cant assign a remote device as an input to a function block
Last updated: 2023-03-23

Is it possible to convert a string of 32-bit of binary to a float32? ^{CODESYS Forge talk (Thread)}
Is it possible to convert a string of 32-bit of binary to a float32?
Last updated: 2023-03-23

Can't figure out how to "save" a value of a variable ^{CODESYS Forge talk (Thread)}
Can't figure out how to "save" a value of a variable
Last updated: 2017-02-19

CmpIecVarAccess to get name of a type, not of a variable (instance) ^{CODESYS Forge talk (Thread)}
CmpIecVarAccess to get name of a type, not of a variable (instance)
Last updated: 2016-06-08

Cannot pass array of constant size to a function as a reference ^{CODESYS Forge talk (Thread)}
Cannot pass array of constant size to a function as a reference
Last updated: 2024-01-09

I want to convert a WORD to a hex string like 15.432 to '3C48' ^{CODESYS Forge talk (Thread)}
I want to convert a WORD to a hex string like 15.432 to '3C48'
Last updated: 2024-04-19

call of a method of a function block in another program ^{CODESYS Forge talk (Thread)}
call of a method of a function block in another program
Last updated: 2024-06-03

call of a method of a function block in another program ^{CODESYS Forge talk (Thread)}
call of a method of a function block in another program
Last updated: 2024-06-03

Assigning Modbus addresses to a structure in a dynamic way ^{CODESYS Forge talk (Thread)}
Assigning Modbus addresses to a structure in a dynamic way
Last updated: 2025-10-21

How can adding a colored leather vest upgrade a simple outfit? ^{CODESYS Forge talk (Thread)}
How can adding a colored leather vest upgrade a simple outfit?
Last updated: 2025-12-15

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 davidbo on How to switch between dynamic IP address and dynamic? ^{CODESYS Forge talk (Post)}
I want to make an application with a UI for CODESYS Control for Raspberry Pi MC SL which make it possible to switch between dynamin and fixed IP address and to set the IP address. However I do not know whether that is possible?
Last updated: 2023-11-06

Post by bjohnson on Failed to instantiate the frame window error ^{CODESYS Forge talk (Post)}
IT updated a group policy that caused this issue. We resolved by going to Local Group Policy Editor > Local Computer Policy > Computer Configuration > Windows Settings> Security Settings > Local Policies > Security Options. Set "System Cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" to DISABLED
Last updated: 2025-05-23

Post by bjohnson on CODESYS and Win10 - "the version profile is not valid" error ^{CODESYS Forge talk (Post)}
We just had this problem today when our IT updated a group policy. You need to go to Local Group Policy Editor > Local Computer Policy > Computer Configuration > Windows Settings> Security Settings > Local Policies > Security Options. Set "System Cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" to DISABLED
Last updated: 2025-05-23

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