How to use __VARINFO within a function block to obtain the origin variable name? ^{CODESYS Forge talk (Thread)}
How to use __VARINFO within a function block to obtain the origin variable name?
Last updated: 2022-03-15

Runtime variable that indicates a user is online to the code ^{CODESYS Forge talk (Thread)}
Runtime variable that indicates a user is online to the code
Last updated: 2024-04-22

Post by aris-k on Pack TWO INT variable to one DINT variable ^{CODESYS Forge talk (Post)}
You can try this setup: DINTVar := SHL(INT_TO_DINT (Low_Word_INT_Var),16) + INT_TO_DINT(High_Word_INT_Var);
Last updated: 2024-05-07

Post by daanyouknow on Using a raspberry pi and NVLs to log variables outside of Codesys ^{CODESYS Forge talk (Post)}
Hi, My PLC/controller doesn't support OPC UA, so my current plan to create a ringbuffer/circular logger is to connect a raspberry pi to it, use the Network Variable List receiver and sender and raspberry pi codesys runtime to get the variables to the raspberry pi, after which I will use the pi which DOES support OPC UA to get the variables to a python program which logs the desired variables for a certain amount of time for me, would this work? I don't want to spend 50+ euros + licencing fees for a solution that might not work.
Last updated: 2 days ago

Post by trusty-squire on How can you get the active frame index from a frame ^{CODESYS Forge talk (Post)}
If you are switching a frame based on the "Switch Frame Variable", then just use a variable that is accessible to your program to set your active frame. If you're trying to see which is the active visualization, then use the "CurrentVisu" variable. Note you'll need to enable this by checking it on in the Visualization Manager settings. If it's neither of those, you'll need to be more clear on how you're project is set up.
Last updated: 2025-03-11

Post by gunstr on CODESYS control on RPi starts, shortly runs, then exits ^{CODESYS Forge talk (Post)}
Thank you very much for the quick answer! The RPi hw were delivered last week so it's probably a resent version. I found an old scrapped board (2 years or so) with a broken GPIO that I tested with the same SD card image and with that board Codeys can run for the full 2h demo period without issues. Then I went back the the new board to test the 4.17.0.0 release but the installation fails... [INFORMATION] Standard output: create and install daemon [INFORMATION] Standard output: codesyscontrol started [WARNING] Unable to detect Raspberry Pi Architecture. Setting armv6l as default, you can change this through the settings panel. [INFORMATION] Standard output: codesyscontrol stopped [ERROR] Expected exit value of command failed: expected 0, received 1 [WARNING] Error setting the Raspberry Pi Architecture [ERROR] Error installing codesyscontrol Do you have any idea what could be the reason? I'm using an OS image including Python drivers for LCD and some I/O:s from last year to keep things stable, but also after upgrading with sudo apt update && sudo apt upgrade I still get the same error Reverting back to 4.15.00 works fine: [INFORMATION] Standard output: create and install daemon [INFORMATION] Standard output: codesysedge started [INFORMATION] Successfully installed codesyscontrol [INFORMATION] Successfully started CODESYS Edge Gateway for Linux [INFORMATION] Successfully started CODESYS Control for Raspberry Pi SL but as before the Codesys services stops after 30 seconds. And I noticed that the Codesys control stops and is not reachable also if I have no application loaded.
Last updated: 2025-09-02

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Last updated: 2024-10-26

Post by hwopereis on How to use Application Trigger in Modbus TCP Server ^{CODESYS Forge talk (Post)}
Hi, I'm currently reading and writing several registers with a Modbus TCP server as a subdevice of a Modbus TCP Client. If I read and write cyclically, there are no issues. The problem is this: I see there is also the option to write by "Application", which I would like to use. However, I don't know With the Modbus RTU client, I see there is a trigger variable, xTrigger, to trigger the writing tasks. However, I can't find any such trigger for the Modbus TCP Client. Does anybody know how to implement the trigger behavior for the Modbus TCP client? In particular, I struggle to find the exact "trigger" variable. I'm running Modbus Client version 4.4.0.0 Thanks in advance!
Last updated: 2024-07-01

Post by dkugler on Webvisu client connection monitoring ^{CODESYS Forge talk (Post)}
is your pointer set to the correct visu client? set a breakpoint in your client iteration and step through the active visu clients like programming system, targetvisu, webvisu,... and check the last usage value of each client
Last updated: 2024-08-30

Post by timvh on Help with DynamicTextGetTextW ^{CODESYS Forge talk (Post)}
First of all you need to enable "Use unicodestrings" in the Visualization Manager. This function returns a pointer to a WSTRING (not STRING). To get this wstring value, do something like this: VAR myWstringVariable : WSTRING(255); END_VAR myWstringVariable := myResult^; // this is dereferencing the pointer to the WSTRING.
Last updated: 2024-09-03

Post by pernockham on Inheritence of struct, ^{CODESYS Forge talk (Post)}
Easier that I thought, by ALIAS TYPE log_item_val_type : ( BOOL_ := 0, INT_, REAL_, STRING_ ); END_TYPE TYPE LOG_DATA_BASE STRUCT val_type : log_item_val_type; (* value, name etc *) ENDSTRUCT ENDTYPE TYPE LOG_DATA_BOOL : LOG_DATA_BASE := (val_type := log_item_val_type.BOOL_); END_TYPE TYPE LOG_DATA_INT : LOG_DATA_BASE := (val_type := log_item_val_type.INT_); END_TYPE TYPE LOG_DATA_REAL : LOG_DATA_BASE := (val_type := log_item_val_type.REAL_); END_TYPE TYPE LOG_DATA_STRING : LOG_DATA_BASE := (val_type := log_item_val_type.STRING_); END_TYPE
Last updated: 2025-03-05

Post by dim54 on MBChannel ^{CODESYS Forge talk (Post)}
Hello! I am interested in the Modbus Slave channel parameter uiReadLength to use in the ST-program (see picture). How to read the value of uiReadLength in a ST-program? Only Edwin the Great and Terrible can answer this question.
Last updated: 2024-01-22

Post by tomas111 on Text List Fallback Value ^{CODESYS Forge talk (Post)}
What version of codesys? Need to avoid in any specific element? Try writing %s in the text, it should work. Or better yet, attach a screenshot.
Last updated: 2024-04-17

Post by sigurdrb on OPC server in "Communication manager" ^{CODESYS Forge talk (Post)}
Hi! I was thinking of switching the OPC server config from "Symbol Configuration" to the "Communication manager" in the device tree. I Have a lot of arrays of structs that I have previously declared in the "Persistent Variable" object in the device tree. It seems as it is not supported to directly expose persistant variables to the OPC server like the "older" way of doing it in the symbol config. Is this correct? Do you recommend to just do it the old fashioned way, or should I edit the structure of the global variable list / persistant data / OPC server and set up the OPC server from the "Communication manager" object?
Last updated: 2025-01-20

Bypass of "onlineapp.login" ^{CODESYS Forge talk (Thread)}
Bypass of "onlineapp.login"
Last updated: 2014-08-22

Management of Unit Tests ^{CODESYS Forge talk (Thread)}
Management of Unit Tests
Last updated: 2018-10-05

Example of CmpIecVarAccess ^{CODESYS Forge talk (Thread)}
Example of CmpIecVarAccess
Last updated: 2020-04-03

Cause of error message ^{CODESYS Forge talk (Thread)}
Cause of error message
Last updated: 2021-09-18

ARRAY of unknow struct ^{CODESYS Forge talk (Thread)}
ARRAY of unknow struct
Last updated: 2017-10-09

Initialization of POUs (FB_Init) ^{CODESYS Forge talk (Thread)}
Initialization of POUs (FB_Init)
Last updated: 2024-07-29

Comparing Arrays of structure ^{CODESYS Forge talk (Thread)}
Comparing Arrays of structure
Last updated: 2024-08-23

Array of Program ^{CODESYS Forge talk (Thread)}
Array of Program
Last updated: 2024-09-03

Track position of dialog ^{CODESYS Forge talk (Thread)}
Track position of dialog
Last updated: 2025-02-25

Inheritence of struct, ^{CODESYS Forge talk (Thread)}
Inheritence of struct,
Last updated: 2025-03-14

Automatic assignment of instances ^{CODESYS Forge talk (Thread)}
Automatic assignment of instances
Last updated: 2024-10-17

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