Post by davidbo on How to stop dhcpcd and use SysSockSetIpAddressAndNetMask to set address? ^{CODESYS Forge talk (Post)}
It is stated: "Dynamic ip address, provided by DHCP, BOOTP, etc. Cannot be changed by SysSockSetIpAddressAndNetMask()" Therefore I try to stop dhcpcd and flush the eth0 like this VAR CONSTANT flushIP:STRING:='sudo ip addr flush dev eth0'; stopDHCP:STRING:='sudo systemctl stop dhcpcd'; END_VAR SysProcessExecuteCommand2(pszCommand:=stopDHCP, pszStdOut:=stdout,udiStdOutLen:= SIZEOF(stdout),pResult := ADR(Result)); SysProcessExecuteCommand2(pszCommand:=flushIP, pszStdOut:=stdout,udiStdOutLen:= SIZEOF(stdout),pResult := ADR(Result)); Besides losing the connection when flush occurs the CODESYS halts, seen on the display and I cannot see why, because I have lost the connection from my IDE. Why does the flush command halt the execution of the application?
Last updated: 2025-11-04

Post by ranadheer on Assistance for MQTT configure with external broker (Mosquitto) ^{CODESYS Forge talk (Post)}
Hi everyone Am trying to make establish MQTT connection , where am using IIOT example for this as a demo mode. where i had given IP-address of of local Linux application as a 172.31.239.67 and port number as 1883 in the PLC_PRG itself, and preparing the publish message by manually as " this is from published message", and this should receive at the subscriber side. Aim: To make communicate external publisher to the CODESYS by using MQTT protocol. By any chance having reference documents about this implementation please share here. and suggest the process to make it possible. I had uploaded reference project file after updating address in th PLG_PRG, kindly assist to configure with the broker
Last updated: 2025-12-03

Post by rschwager on GVL to SHMem ^{CODESYS Forge talk (Post)}
Hallo! Have some any idea to transfer whole GVL to Shared Memory? I also shared REATIN memory to shraed meory for making a Retain Backup System without USP in Linux on a FRAM. For an other Application we want to shared the whole GVL off obne part (e.g. GVL_Test). How cvan I get easy the Size and the Address for meory copy?
Last updated: 2024-07-09

Post by davidf on Error trying to activate the demo Git licence ^{CODESYS Forge talk (Post)}
The CodeMeter Control Center log shows the following: 2024-10-11 21:02:13: Entry (6000437:8747) not found - Event WB0200 (ENTRY NOT FOUND), Request IP-Address local(IPV4) (SID 0xc079 / 0x00) with StationShare Mode 2024-10-11 21:02:13: API Error 200 (ENTRY NOT FOUND) occurred!
Last updated: 2024-10-11

Post by morecoffee on Control for Raspberry Pi 4.17 ^{CODESYS Forge talk (Post)}
I am currently having the issue that Codesyscontrol only runs for 10 seconds on my Raspberry Pi 4. I believe the problem is because the MAC address range is of the Raspberry is 88:A2:9E:XX:XX:XX. When will Codesys Control For Raspberry Pi 4.17.0.0 be released to fix this issue?
Last updated: 2025-08-22

Post by felipemsgarcia on Generic EtherCAT slave ^{CODESYS Forge talk (Post)}
Hello, Without much info, I would assume that this is an optional object on the EtherCAT network and it's either disconnected or the address doesn't match. I would look into the devices manual or contact the manufacturer for further assistance. And, I would have posted a new topic instead of using a non related one... Cheers!
Last updated: 2024-05-16

Post by xiaoyan on Generic EtherCAT slave ^{CODESYS Forge talk (Post)}
Hello Well i need some basic advice. My protegoD drive is shown deactivated in the device tree. i can see its variables and other i/o in online mode but the device itself is deactivated. how can i address this issue. is there any configuration error.using ethercat link to connect to protegoD by Primo MC plc
Last updated: 2024-05-16

Post by rjonker on codesys mqtt publish serialization ^{CODESYS Forge talk (Post)}
pbPayload is a pointer, which it expects to point at a STRING. If you point it at an address holding a different data type, it will just assume those bytes are part of a string and likely trundle along memory until it finds a null byte (0x00) that would normally signify the end of a string PublishMessage := BOOL_TO_STRING(boolVariable);
Last updated: 2024-06-05

Post by ucconversions on displaying all incoming CAN bus messages ^{CODESYS Forge talk (Post)}
Hello Im using CAN API Im receiving CAN messages with no problem. below is my code. METHOD ProcessMessage VAR_IN_OUT ( Incoming message ) Message : CAN.RxMESSAGE; END_VAR VAR i: USINT; END_VAR recvCANid := Message.udiCanID; IF recvCANid = 16#18FF8247 THEN UserVarGlobal.g_countMsg_RPMset := UserVarGlobal.g_countMsg_RPMset + 1; FOR i := 0 TO 7 DO myDataFF82[i] := Message.abyData[i]; END_FOR END_IF but in this way I can only display CAN messages which I know its ID. I want to display all incoming CAN messages for example first incoming CAN message - I assign it into a variable Message1. second incoming CAN message - I assign it into a variable Message2. third incoming CAN message - I assign it into a variable Message3. Can you give me guidance? Thank you BR
Last updated: 2024-07-18

Post by r-niedermayer on Issue with WebVisu on Raspberry PI ^{CODESYS Forge talk (Post)}
Regarding to your application: When clicking in the web visualization, the boolean variable will be tapped for both buttons. The LED in the web visualization lights up as long as the variable is true The used variables should come from the GVL, ad/or thePLC_Prg. We see no difference or problem in both projects: You have created a visuelement Push button a a tapper, that is supposed to control the variable in this way as expected. This is also reflected (switching Bool from false to true) in the program code, as well as in the (GVL declared) variables. Wherever the misunderstanding comes from: no, this is not memory or license related. Our best guess: it is probably more of an applicative/conceptual implementation.
Last updated: 2024-04-11

Post by ac-spr on Runtime variable that indicates a user is online to the code ^{CODESYS Forge talk (Post)}
Looking to access a variable at runtime that indicates a user is online to the code. essentially want to use this value to feedback to the user on the HMI. we use turck and bosch rexroth devices if this information helps. I was hoping there was a variable at the application level, or a library that could be used but I was unable to find anything. I know there's a pop up when you try to login/ go online to the code when a user is already logged in, so the system does provide an indication that it knows already online, but has no access to a value from what I can see. Any help is appreciated
Last updated: 2024-04-22

Post by pernockham on Trend legend naming and access/config to/of trend/legend-variables ^{CODESYS Forge talk (Post)}
There seems to have been included an updated in the last release 4.9.0.0 or am I wrong (I think I tried out these settings previously without giving the result I wanted contrary to what I see today)? Now an empty check box for "display variable name" is effective, and will present the Variable with the "Description" instead. Perfect! Seems to be some minor formatting still that needs adjustment. See attached screenshot. The apostrophe "'" between "description" I suppose should not be there? Also I guess the same apostrophe (although not visibly shown) gives an extra space between the variable-description and the ":"?? Thanks!
Last updated: 2025-12-19

Post by timvh on Licensing info not available. ^{CODESYS Forge talk (Post)}
In the VPLC configuration settings there is an entry for the IP address of the license server. In this setting fill in the IP address of your device (host IP address). Then when the virtual PLC starts up, it will get the license from the license container on the host. You can do this for all VPLC's running on your device. The VPLC will always take the smallest license which fits the required license. So if you have 2 licenses for VPLC's with small and large applications, then this will work fine if you start up one VPLC which requires the small license and the other which requires the large license. PS, personally I find it much easier, especially for testing and experimenting, to activate the licenses on a CODESYS (USB) key. This is easy to activate (on your development PC) and easier to move to another device. Addtionally you don't loose the license when you need to install a completely new image on the device.
Last updated: 2025-10-02

Post by alexgooi on Modbus writing on value change ^{CODESYS Forge talk (Post)}
Hi Duvan, You could make this in 1 single object (FB), Indeed don't use a function for this beacuse you need some memory to keep the old value. For i := 0 TO 200 BY 1 DO //Check if the value has been changed IF Old_Value[i] <> Value[i] THEN //Set the trigger to TRUE Trigger[i] := TRUE; Old_Value[i] := Value[i]; END_IF END_FOR If you define the Value array as an In_Out and the Trigger as an In_Out you arn't claiming any aditional memory to your system. You ofcourse then need to add some code arround it that does something with the trigger and writes it back to FALSE again. If you want more flexability you also could use pointers instead of using the IN_OUT FOR i := 0 TO 200 BY 1 DO address := address_Input + i * SIZEOF(*Put type here); IF Address^ <> Old_Value[i] THEN Trigger[i] := TRUE; Old_Value[i] := Address^; END_IF END_FOR
Last updated: 2024-04-02

Post by macros8 on Alarm Management - latched variable represented as Text list ^{CODESYS Forge talk (Post)}
Hi all, in Alarm management you can latch some variable to show value within the alarm msg. It´s very useful sometime. But I´m wondering whether there is any possibility to represent that value as Text list. It´s quite common in other HMI tools and this is very useful in case of using some ErrorID for detail specification of error. Unfortunately I could not find any way how to do it but I believe that exists :) Thanks a lot. M.
Last updated: 2023-09-06

Post by ggarcia94 on IMAGE DISPLAY ACCORDING TO INPUT VARIABLE ^{CODESYS Forge talk (Post)}
Reopening this thread as I need to make a few images visible depending on the value of a variable. However, in the properties of the image I do not have the option to make the image visible (see attached image). I´m using Codesys V3.5 SP19. However, when I use V3.5 SP17 I have the option to make the images visible. Can someone help me achieve this with V3.5 SP19? EDIT: Fixed. Just had to uncheck Support client animations in the Visualization manger settings
Last updated: 2023-09-12

Post by timvh on SafetyApp - "Invalid ERR Ack input" ^{CODESYS Forge talk (Post)}
I had a similar error "Invalid ERR Ack input". What you need to do is link an variable from the "non-safe" PLC to the Group IOs of the POU in the Safety app. * Add a POU to the SafetyApp (probably already done, otherwise you don't get this error) * Right click on this POU - select properties * Go to the Group IOs tab * Link a variable to the Err.Ackn. input I don't know about the Size of zero, I didn't get this error. Were you able to fix this?
Last updated: 2023-11-16

Post by simotion on Inheritance of axis ^{CODESYS Forge talk (Post)}
I have developped a function block 'Axis' the inherits from 'AXIS_REF_SM3' -> FUNCTION_BLOCK Axis EXTENDS AXIS_REF_SM3 In my global variable list I define a variable MasterDrive of type Axis and assign Axis1. Axis1 is a virtual drive (AXIS_REF_VIRTUAL_SM3). This type should inherit from AXIS_REF_VIRTUAL. VAR_GLOBAL MasterDrive : Axis := Axis1; However I get the error 'Cannot convert type'. What is the way to obtain what I want : function block inheriting AXIS_REF_SM3 and initialising this function block with a Softmotion virtual or real axis?
Last updated: 2023-12-07

Post by pedrorgd on SFC Exit Action during SFCReset Flag ^{CODESYS Forge talk (Post)}
I have an SFC POU with an SFCReset Flag that I use to restart it from the beginning. It works properly. During an Action Step I set one variable to TRUE and I reset it to FALSE during the Exit Action. My question is if this Exit Action will be activated -and the variable reset to FALSE- if I get out of the active step using the SFCReset Flag.
Last updated: 2025-02-11

Post by timvh on JSON ^{CODESYS Forge talk (Post)}
I don't know the details of jsonArrayWriter, but the common behaviour for an xExecute input is that the FB starts on the trigger that it gets TRUE. In your case xExecute is never FALSE, so it is never triggered again to start the jsonArrayWriter. So change the condition from TRUE to a variable which you set to TRUE with the "xFirst". Then when the jsonArrayWriter is done (xDone), or has an error (xError), then set this variable to FALSE.
Last updated: 2024-05-01

Post by automa on Defining local variables that can be independent with several users. ^{CODESYS Forge talk (Post)}
Hi, I am looking for a way to define a local variable that will be multi user independent. This is so several user can connect at the same time select frames independent of each other.
Last updated: 2023-09-04

Post by sturmghost on Specify Input Configuration "OnDialogClosed" Action to only react to certain Dialogs ^{CODESYS Forge talk (Post)}
You could work around this problem by implementing some sort of "state machine". Each dialog sets a boolean variable when they are closed so you know which dialog was closed. Then you can react to this accordingly.
Last updated: 2023-10-01

Post by gorditron on Modbus Slave RTU in der Applikation abschalten ^{CODESYS Forge talk (Post)}
Hallo, gibt es eine Möglichkeit die Modbus Slaves (ModbusSlaveComPort) innerhalb der Applikation über ein Variable zu aktivieren oder zu deaktivieren? Bilder als Datei Danke!
Last updated: 2023-11-09

Post by imdatatas on Axis variable indicating modulo of finite setting ^{CODESYS Forge talk (Post)}
You could try with "iMovementType" member of AXIS_REF_SM3 struct. https://content.helpme-codesys.com/en/libs/SM3_Basic/Current/SM3_Basic/DriveInterface/AXIS_REF/AXIS_REF_SM3.html https://content.helpme-codesys.com/en/libs/SM3_Basic/Current/SM3_Basic/DataTypes/DriveInterface/SMC_AXIS_TYPE.html
Last updated: 2023-11-25

Post by nathant on Saving variable values on power cycle (RevPi Connect) ^{CODESYS Forge talk (Post)}
Hello, this seems to be a known issue, but persistent/retain variables don't seem to work properly on RevPi devices. Is there a workaround to this? All I need is for a few configuration variables to be remembered through power cycle.
Last updated: 2023-12-03

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