Persistent Retain Variables Not Visible in Online View (WAGO PFC100 + CODESYS) ^{CODESYS Forge talk (Thread)}
Persistent Retain Variables Not Visible in Online View (WAGO PFC100 + CODESYS)
Last updated: 2025-10-26

Has anyone fed ESP32 sensor data into CODESYS (via MQTT/Modbus)? ^{CODESYS Forge talk (Thread)}
Has anyone fed ESP32 sensor data into CODESYS (via MQTT/Modbus)?
Last updated: 2025-10-29

Post by davidbo on How to stop dhcpcd and use SysSockSetIpAddressAndNetMask to set address? ^{CODESYS Forge talk (Post)}
The reason for why CODESYS halts was a CODESYS watchdog exception. 'sudo ip' takes a long time.
Last updated: 2025-11-04

Using a raspberry pi and NVLs to log variables outside of Codesys ^{CODESYS Forge talk (Thread)}
Using a raspberry pi and NVLs to log variables outside of Codesys
Last updated: 2025-11-21

CoDeSys v3.5: creating libraries for both 32-bit and 64-bit controllers ^{CODESYS Forge talk (Thread)}
CoDeSys v3.5: creating libraries for both 32-bit and 64-bit controllers
Last updated: 2025-12-10

High resolution displays with 150% scaling causes CodeSys IDE to be blurry ^{CODESYS Forge talk (Thread)}
High resolution displays with 150% scaling causes CodeSys IDE to be blurry
Last updated: 2026-01-07

Post by dafalin-codesys on Transparent wireless serial bridge for Modbus RTU – experience with LoRa/WiFi RS-485 link to CODESYS runtime ^{CODESYS Forge talk (Post)}
Last updated: 2026-03-18

CODESYS crashes when adding standard OPC UA Information Model to Communication Manager ^{CODESYS Forge talk (Thread)}
CODESYS crashes when adding standard OPC UA Information Model to Communication Manager
Last updated: 2026-03-27

Blocking UDP ports 1740–1743 and 22350 to disable CODESYS network scan (startup + device discovery) ^{CODESYS Forge talk (Thread)}
Blocking UDP ports 1740–1743 and 22350 to disable CODESYS network scan (startup + device discovery)
Last updated: 2026-03-31

Post by nicolasquintin on Codesys Installation Always Freeze when the installing is almost done ^{CODESYS Forge talk (Post)}
Hi, I'm having the same issue. Did you find a way to successfully install Codesys software ?
Last updated: 2026-04-04

Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue ^{CODESYS Forge talk (Thread)}
Codesys v3.5.22.10 - Internal error:System.AggregateException...Value cannot be null...Parameter name: expLValue
Last updated: 2026-04-22

CODESYS SoftRedundancy — Both PLCs stay standalone after network interruption — Auto recovery not working ^{CODESYS Forge talk (Thread)}
CODESYS SoftRedundancy — Both PLCs stay standalone after network interruption — Auto recovery not working
Last updated: 2026-05-02

CodeSys OPC UA client Unable to Connect To OPC UA sever through Username and password ^{CODESYS Forge talk (Thread)}
CodeSys OPC UA client Unable to Connect To OPC UA sever through Username and password
Last updated: 2026-05-07

Codesys Trend - setting Y axis minimum and maximum as variables - error ^{CODESYS Forge talk (Thread)}
Codesys Trend - setting Y axis minimum and maximum as variables - error
Last updated: 2026-05-22

OPC UA Codesys 3.5 Symbolkonfiguration VS Kommunikationsverwalter und Python/UA-Expert ^{CODESYS Forge talk (Thread)}
OPC UA Codesys 3.5 Symbolkonfiguration VS Kommunikationsverwalter und Python/UA-Expert
Last updated: 2026-05-22

Port instantiation of serial interface in WAGO PLC using Modb_L05.lib in CoDeSys v2.3 ^{CODESYS Forge talk (Thread)}
Port instantiation of serial interface in WAGO PLC using Modb_L05.lib in CoDeSys v2.3
Last updated: 2026-06-11

[New Hardware] EtherCAT Digital & Analog IO Board – CODESYS Compatible, All Channels Isolated ^{CODESYS Forge talk (Thread)}
[New Hardware] EtherCAT Digital & Analog IO Board – CODESYS Compatible, All Channels Isolated
Last updated: 2026-06-13

Post by benwzd on How to get SYM File on CodeSys 3.5 ^{CODESYS Forge talk (Post)}
Hello, I am looking to obtain the SYM file on CodeSys please? this is to import into PCVue Thanks
Last updated: 2026-01-27

CODESYS: Combining Master Redundancy with EtherCAT Ring Topology – Is it Supported? ^{CODESYS Forge talk (Thread)}
CODESYS: Combining Master Redundancy with EtherCAT Ring Topology – Is it Supported?
Last updated: 2026-02-06

AM243 LaunchPad as PROFINET Device with CODESYS – RPC Aborted error when scanning devices ^{CODESYS Forge talk (Thread)}
AM243 LaunchPad as PROFINET Device with CODESYS – RPC Aborted error when scanning devices
Last updated: 2026-03-13

Codesys Trend - setting Y axis minimum and maximum as variables - error ^{CODESYS Forge talk (Thread)}
Codesys Trend - setting Y axis minimum and maximum as variables - error
Last updated: 2026-03-22

Post by heman on CODESYS and Github Copilot ^{CODESYS Forge talk (Post)}
you might want to have a look at www.plc-assist.com . its an agentic chatbot that connects to you codesys projects.
Last updated: 2026-04-27

CODESYS Date/Time Picker in Dialog does not update value on close (focus issue) – any workaround? ^{CODESYS Forge talk (Thread)}
CODESYS Date/Time Picker in Dialog does not update value on close (focus issue) – any workaround?
Last updated: 2026-05-21

CODESYS SoftMotion Generic DSP402 on WAGO PFC200 + Festo CMMT-AS: MC_Power stays Busy, Controlword remains 0 ^{CODESYS Forge talk (Thread)}
CODESYS SoftMotion Generic DSP402 on WAGO PFC200 + Festo CMMT-AS: MC_Power stays Busy, Controlword remains 0
Last updated: 2 days ago

Post by bjarne-pagaard on Communication between applications on same device/controller/runtime (Win RTE 3.5.20.20) ^{CODESYS Forge talk (Post)}
Hi, I would like to divide a project into multiple applications - as a minimum: one handling visualization and Alarm Manager, one handling I/O and plant control logic. But how to exchange variables between the applications? What have you done to get such a solution? In versions 3.5.19 and earlier, you can have Child applications, where the children can access a GVL in the Parent application. Children apps is no longer possible in 3.5.20 - but you can have 'sibling' apps - Several apps directly under PLC Logic, that is. But how do they best communicate? The Communication Manager / Data Sources Manager is sort of possible via OPC UA, but it seems like overkill and with some limitations - for example no ARRAY OF STRUCT possible this way. If you have separate devices in your project, you can exchange data via 'CODESYS ApplicationV3', but not other applications in the same device (see attachment Datasources.png). You can do it via 'Select the project type'->'Other Project' and select the same project file, but this leads to crashing the Development system when working with the variables afterwards. It would be great to hear your thoughts / experiences on this topic - Bjarne
Last updated: 2024-09-27

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