Python Scripting: How to detect and handle "Object reference not set to an instance of an object" error ^{CODESYS Forge talk (Thread)}
Python Scripting: How to detect and handle "Object reference not set to an instance of an object" error
Last updated: 2023-08-16

Post by otdeveloper on IEC 61499 ^{CODESYS Forge talk (Post)}
Hello all, I cannot find anything connecting IEC-61499 to CODESYS. Considering the quality of the CODESYS IEC-61131-3 implementation and that IEC-61499 expands on it, literally including as integral part, why is there no mention of CODESYS and IEC-61499 anywhere on the internet?
Last updated: 2024-02-08

Post by warrumungi on Opening a Dialog on a specific Client from ST ^{CODESYS Forge talk (Post)}
Hi Thanks, Manuel, for providing this solution and insight. I too had exactly the same problem as you did. While I did implement a custom filter, I'd also like to point out what jinlee mentioned above...I see no reference to VU.PublicVariables.Clients.Current anywhere?? In my case I only needed to show a dialog on a "master" client, not all the clients, so I filtered by IP address to do this.
Last updated: 2024-11-05

Post by valenting on License problem with Raspberry Pi ^{CODESYS Forge talk (Post)}
Hello, I have a raspberry pi with a license installed, but Codesys stops after 2 hours, and when I start it manually I have the following message: pszInfo=!!!! no runtime license - running in demo mode(~2 hours) I tried using License Manager, and got the following message: Licensing info not available. There is no dongle attached to the device. I have this message frequently, and usually removing the content of /var/opt/codesys/.cmact_license makes it work. After doing it and restarting Codesys, I have an empty Softcontainer without my License. I tried using "Install license" using the .WibuCmRau file for the corresponding license and got the following message: Licensing info not available. The device does not support this service. I also tried using Additional Functions > Restore Licenses with the Ticket ID and got the following message: This device does not support automatic license backup. How can I reinstall the license to this Raspberry Pi?
Last updated: 2025-11-28

Post by yannickasselin on Lenze i950 Servo and WAGO PFC200 ^{CODESYS Forge talk (Post)}
I don't have time to go through the whole manual but as I said earlier, the servo drive does not support any of the modes needed for SoftMotion Light to work. If you want to use the full SoftMotion, you could use SMC_Homing function block to do the homing. This function block does not use the Homing Mode. It still uses the CSP mode and does the logic in Codesys runtime instead of in the servo drive. Read the documentation about it to see if it fits your needs. But if your controller only supports SoftMotion Light, I am afraid you will not be able to use the i950. I do a lot of motion stuff with different servo brands. Some support all the modes needed for SoftMotion Light and some don't. You really need to make sure the modes are supported before choosing a brand over another. I tend not to use brand specific controllers in order not to be limited by their supported features. I usually choose a PC (Linux or Windows) and install the Codesys runtime and licences myself. This is the most flexible way to use Codesys in my opinion. Depending on how many axes are needed in your project, a full SoftMotion license may not be more expensive than SoftMotion Light because SoftMotion is available as Application based license whereas SoftMotion Light is not. But of course, SoftMotion is harder on the CPU than SoftMotion Light.
Last updated: 2026-02-13

Post by askjong on Update variables when OPC UA Client updates. Error ID: 268468277 BadAttributeIdInvalid ^{CODESYS Forge talk (Post)}
Hi, I'm connecting to a OPC UA Server using the Data Soruce Manager OPC UA Client. This works well until the OPC UA Server updates and the OPC UA list doesn't match up when i did last clicked the "Update variables" to add variables. All the variables are still the exists and none are removed from the server, but more are added during the engineering process. The error message i get in CODESYS is "Error in OPC UA call BadAttributeIdInvalid, Error ID: 268468277". The issues is fixed when i press the "Update variables" button and just press ok without adding or removing any variables in the list. Is there a way to either automatically update the browsepath if it fails or on startup, or to trigger it by code?
Last updated: 2024-01-08

Post by esave on OPC UA Server with on Codesys + OPC UA Client on Labview ^{CODESYS Forge talk (Post)}
Hello everyone I want a communication between my PLC as an OPC UA Server and Labview on my PC as the OPC UA Client. I have an Festo CPX-E-CEC-C1-PN PLC and I have the OPC UA Toolkit from Labview. I created some Variables for testing (see picture 1) on Codesys. I tried to use this Labview block diagram (see picture 2) but I cant connect the PLC to it. What do I have to type in the Server Endpoint URL and what in the Node ID? Is this a good way for communication with a PLC to a PC? If not is there another way?
Last updated: 2024-04-12

Raspberry PI and MCP23017 ^{CODESYS Forge talk (Thread)}
Raspberry PI and MCP23017
Last updated: 2020-09-20

G75 and Position Tracker ^{CODESYS Forge talk (Thread)}
G75 and Position Tracker
Last updated: 2023-02-21

Win7 and Permissions ^{CODESYS Forge talk (Thread)}
Win7 and Permissions
Last updated: 2011-06-10

Codesys and QT Communication ^{CODESYS Forge talk (Thread)}
Codesys and QT Communication
Last updated: 2022-01-09

parker servo and position ^{CODESYS Forge talk (Thread)}
parker servo and position
Last updated: 2024-08-07

FB string and naming ^{CODESYS Forge talk (Thread)}
FB string and naming
Last updated: 2024-10-02

PersistentVars and Webvisu Element ^{CODESYS Forge talk (Thread)}
PersistentVars and Webvisu Element
Last updated: 2025-04-07

Atomic and Shared memory? ^{CODESYS Forge talk (Thread)}
Atomic and Shared memory?
Last updated: 2025-04-15

codesys and bacnet ^{CODESYS Forge talk (Thread)}
codesys and bacnet
Last updated: 2017-10-13

SoftMotion and Raspberry pi ^{CODESYS Forge talk (Thread)}
SoftMotion and Raspberry pi
Last updated: 2023-03-27

CNC Editor and Expressions ^{CODESYS Forge talk (Thread)}
CNC Editor and Expressions
Last updated: 2019-05-08

Retentive variables and ModbusTCP ^{CODESYS Forge talk (Thread)}
Retentive variables and ModbusTCP
Last updated: 2016-09-19

Codesys and Version Control ^{CODESYS Forge talk (Thread)}
Codesys and Version Control
Last updated: 2020-12-03

Performance testing and evaluating ^{CODESYS Forge talk (Thread)}
Performance testing and evaluating
Last updated: 2015-07-10

mbus protocol and Codesys ^{CODESYS Forge talk (Thread)}
mbus protocol and Codesys
Last updated: 2019-10-22

SoftMotionLight and Homing ^{CODESYS Forge talk (Thread)}
SoftMotionLight and Homing
Last updated: 2020-08-12

Defining and Raising Exceptions ^{CODESYS Forge talk (Thread)}
Defining and Raising Exceptions
Last updated: 2019-08-17

login and webvisu ^{CODESYS Forge talk (Thread)}
login and webvisu
Last updated: 2020-01-17

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