Post by fabiodasilveira on PLC Shell commands via ST Code ^{CODESYS Forge talk (Post)}
Hello Everybody, I have created a project for an Eaton XC303 that sends lots of data to a router via UDP. It works fine. However, when there is more than one product connected to the router, then it is necessary to change the IP address of the Ethernet port 0, from e.g. 192.168.2.11 to 192.168.2.12 (second product). It is easily done via PLC Shell (setipaddr 0 192.168.2.12), but the people in production is struggling with the PLC Shell commands and I would like to create a Visualization page that will hide that. I used the instruction: eChangeIPResult:= SysSockSetIPAddress(strEthernetPort, strIPAddress); and it works, until the PLC resets. I already read some posts and it appears that I need to stop the Ethernet 0 port and Reconfigure it, but I am really struggling to find the right way to do it. Any help will be much appreciated.
Last updated: 2025-02-28

Post by pernockham on Persistence Manager: Config File not found? ^{CODESYS Forge talk (Post)}
Back in november I paused this, but wanted to reattempt using the persistent manager, the behavior is still the same. Most "login attempts" s are stopped with the message "One or more errors occurred" but I have no idea what that error might be. The only clue is this message is presented while the lower left status box says "Generating code...: relocation pou". For clarification. Build/Generate code is successful, no errors. Error appears when I try to download/login (physical or simulation) to a device. I did manage to login (in simulation mode) at one point, but then the error message "PersistenceChannel: Config file not found!". And no persistence files were created. I have done device-tree/reset-orgin also clean/clean all etc. Removed/re-inserted persistance manager. Behaviour is just the same. Removing Persistence Manage and everything is working OK. Is there possibly more info somewhere about the "One or more errors occured"-message?
Last updated: 2025-03-20

Post by latassan on RaspberryPi 5 gateway problem ^{CODESYS Forge talk (Post)}
Hello, I'm trying to use a raspberryPi 5 as a PLC. I fixed its IP address, I can ping it. I've also installed the CODESYS Control for Raspberry Pi 64 SL runtime on it. So I've created a gateway (IP address of the Raspberry, TCP port 1217). I see the green dot next to this gateway. When I do a network scan, I can see my raspberry (see photo). When I try to connect to it, I have to define an administrator profile, which I do. On validation, I see a message: No device is responding to the scan request. I've checked that port 1217 is listening on the raspberry, I've uninstalled the runtime then installed it again, but I can't connect. Also, when I try to configure the user groups before connecting, I see that Offline mode is not supported by the device, even though I'm connected to it in the Deploy Control SL tab. When I try to refresh, I see: Gateway not configured properly. How can I connect to my Raspberry? Have I defined my gateway incorrectly?
Last updated: 2025-06-12

Post by thn-power on Updating OPC UA Core Nodeset on PLS ^{CODESYS Forge talk (Post)}
Hi After much trail and error I think I found the root cause to my OPC UA problem. The problem is that I cannot manage to build and download a program with a a custom OPC UA Information model. We use a Weidmueller WL2000 PLS, but the problem also exsist on the Win V3 PLC. Our custom information model is based on the latest versions of the OPC UA Core Nodeset v 1.05.03 (2023-09-20) and UA/DI nodeset 1.04.0 (2022-11-03) Those nodesets are installed in the Codesys Information Model Repository (3.5.19.6) However, when trying to build I get the following error. [ERROR] Untitled1: Communication Manager [Device: PLC Logic: Application]: The information model http://opcfoundation.org/UA/ is required by http://bos.org/ with a minimal publication date from 15.12.2023 but the device has only a model from 15.09.2021 installed. Probably the information model from 15.09.2021 is missing in the information model repository. [ERROR] Untitled1: Communication Manager [Device: PLC Logic: Application]: The information model http://opcfoundation.org/UA/DI/ is required by http://bos.org/ with a minimal publication date from 03.11.2022 but the device has only a model from 09.03.2021 installed. Probably the information model from 09.03.2021 is missing in the information model repository. Build complete -- 2 errors, 1 warnings : No download possible I think the problem is that the UA Core nodeset is implemented in the PLC firmware (at least that in Siemens S7), and that only includes the "old" nodeset from 2021-09-21 etc. So the question is, how (or if?) can I transfer the new nodeset to the PLS? I have created separate Information models under Communication manager with the newer code nodesets (UA and DI). But it seems that the compiler does not recognize them being excising, neither in the Codesys IDE or on the PLC. Would have guessed that this is a common issue, sine many manufacturers use the latest versions of the OPC UA standard, and that it would be a solution to the problem.
Last updated: 2024-09-20

Post by olehmann03 on PFC200 - WAGO 750-8202 - MODBUS RTU ^{CODESYS Forge talk (Post)}
Hello, I’m working on implementing Modbus RTU communication with a Carel controller (CPCO). I want to use the front RS485 interface through the DB9 connector. The issue is that I can’t get the communication working correctly. Below are the steps I’ve done so far: Connected pins 3 and 8 from the DB9 connector to the +/- RX/TX terminals on the Carel side. In the PLC shell, I set serialmode to RS485. In WBM under Administration > Serial Interface > Assign owner of serial interface, I set the port to unassigned. In the device tree, I created Modbus_COM with the following settings: COM port: 1 Baud rate: 19200 Parity: None Stop bits: 1 Created a Modbus client on this COM interface in RTU mode. Under the status tab, I can see it is in running state. On the client, I created a Modbus server and set the Modbus address of my unit to 1. Defined a few channels as FC03 to read holding registers according to the Carel register map. I checked the communication with the Carel controller using a USB-to-RS485 converter connected to my PC, and communication works correctly there. In the status tab, I can see that the Modbus server is polling, but there is no response from the controller. I also tried multiple times swapping A/B lines on the Carel side, but it did not help. Do you have any suggestions on what else I should check?
Last updated: 2026-05-22

Post by olehmann03 on PFC200 - WAGO 750-8202 - MODBUS RTU ^{CODESYS Forge talk (Post)}
Hello, I’m working on implementing Modbus RTU communication with a Carel controller (CPCO). I want to use the front RS485 interface through the DB9 connector. The issue is that I can’t get the communication working correctly. Below are the steps I’ve done so far: Connected pins 3 and 8 from the DB9 connector to the +/- RX/TX terminals on the Carel side. In the PLC shell, I set serialmode to RS485. In WBM under Administration > Serial Interface > Assign owner of serial interface, I set the port to unassigned. In the device tree, I created Modbus_COM with the following settings: COM port: 1 Baud rate: 19200 Parity: None Stop bits: 1 Created a Modbus client on this COM interface in RTU mode. Under the status tab, I can see it is in running state. On the client, I created a Modbus server and set the Modbus address of my unit to 1. Defined a few channels as FC03 to read holding registers according to the Carel register map. I checked the communication with the Carel controller using a USB-to-RS485 converter connected to my PC, and communication works correctly there. In the status tab, I can see that the Modbus server is polling, but there is no response from the controller. I also tried multiple times swapping A/B lines on the Carel side, but it did not help. Do you have any suggestions on what else I should check?
Last updated: 2026-05-22

Post by winki on ModbusFB ClientRequest: never recovers after a single ReplyTimeout (requires full download) ^{CODESYS Forge talk (Post)}
Library: ModbusFB (CODESYS Modbus package) IDE / Runtime: CODESYS V3.5 SP___ / Control runtime ___ Target: ___ (e.g. gateway, Linux ARM64 / Debian) Slave: Modbus TCP inverter Summary I poll a Modbus TCP slave with a permanent connection: one ClientTCP (kept connected, xConnect:=TRUE) and one ClientRequestReadHoldingRegisters, triggered cyclically. Everything works fine after a fresh application download. But as soon as one single ReplyTimeout occurs (slave temporarily not answering), the request never recovers. It stays stuck and no further messages are sent, even though the TCP connection is still reported as alive. Only a full application download brings it back — an online change or a runtime reset is not enough / not what I want in production. State observed when stuck So the connection is alive, the request finished in ReplyTimeout, the FB is back to _state = None, but udiNumMsgSent no longer increases — as if a new rising edge on xExecute is no longer accepted / no longer produces a new message. My trigger logic (simplified) Each PLC cycle, in this order: If the request is fully at rest (NOT xExecute AND NOT xBusy AND NOT xDone AND NOT xError) and a read is pending, I set xExecute := TRUE. I call clientTcp() then clientRequest(rClient := clientTcp) once each, per cycle. On xDone or xError, I set xExecute := FALSE. I made sure to insert at least one full cycle with xExecute = FALSE (seen by the FB call) before re-triggering, so the falling edge is processed. Questions After a ReplyTimeout (xError = TRUE), what is the exact, correct sequence to re-trigger the same ClientRequest so a new message is actually sent again? Is a full cycle with xExecute = FALSE between two executions mandatory? Is there a known condition where, after ReplyTimeout, the ClientTCP keeps xConnected = TRUE but silently stops sending new requests (e.g. an internal request queue / _udiRequestId that gets out of sync)? udiNumMsgSent freezing at 23 while the FB shows _state = None is what puzzles me. Is the recommended pattern to drop the connection (ClientTCP.xConnect := FALSE for one cycle, then TRUE) on a request error, rather than keeping it alive? The docs state a request error does not close the connection, so I kept it open — but maybe that is the issue here. Could the large uiStartItem (50514) be relevant? It works right after download, so addressing seems correct, but I want to rule it out. Any guidance on the canonical recovery pattern after a request timeout would be greatly appreciated. Thanks!
Last updated: 2026-06-19

Post by dkugler on Calculate Time Between Two Events Using RTC ^{CODESYS Forge talk (Post)}
a few seconds later with google search... https://stackoverflow.com/a/61986234 SYS_TIME is definitely an ABB AC500 specific function, included in library SysInt_AC500_V10.lib.
Last updated: 2024-08-14

Post by dkugler on Project loses 'Download time' information ^{CODESYS Forge talk (Post)}
if this happens I go to --> Build --> Generate code then there exists a IDE Code and a PLC/API code and comparison before download is possible. Give it a try?
Last updated: 2025-09-18

Post by eschwellinger on "Distributed clocks are not synchronized, Rea time problem on hardware" ? ^{CODESYS Forge talk (Post)}
use a realtime capable target, not Control Win. Either a realtime patched Linux or Control RTE on Windows.
Last updated: 2024-03-04

Post by mmpl on CAA Library Function ^{CODESYS Forge talk (Post)}
I want to change date and time format. I am using CAA storage library function. I am not receiving any value in to output.
Last updated: 2024-04-16

Post by ketanvaishnav on Redundancy Codesys Runtime, Synchronization ^{CODESYS Forge talk (Post)}
i am facing same data sync issue. i am use two 750-8212 (FW30) controllers. datas are sync from active to standby during changeover time, but datas are not sync from standby to active.
Last updated: 2026-01-30

Post by julianramirez on Codesys Trend - setting Y axis minimum and maximum as variables - error ^{CODESYS Forge talk (Post)}
Hello Hannibal, I am using real vars and it works, however, if I update those vars in real time it doesnt quite change it on y axis, do you think it is because it is not an integer?
Last updated: 2026-05-21

Post by jst69 on Python script: Launch Codesys, Execute Script, Exit Codesys ^{CODESYS Forge talk (Post)}
Dear all: Question about scripting: I am creating a .NET program that is supposed to Open codesys, open template project, export a bunch of pou, then exit codesys. Launch works, Open project works, Export works, But how do i tell codesys to close itself? I can tell windows to terminate codesys, but i would prefer to do it properly. from __future__ import print_function import sys import System proj = projects.primary # We're interested in POU nodes: POUGuid = Guid("6f9dac99-8de1-4efc-8465-68ac443b7d08") # We collect all POU nodes in that list. pous = [] # From the parent node on, we recursively add POU nodes: def CollectPous(node): if node.type == POUGuid: pous.append(node) else: for child in node.get_children(): CollectPous(child) # Now we collect all the leaf nodes. for node in proj.get_children(): CollectPous(node) # We print everything just to know what's going on. for i in pous: print("found: ", i.type, i.guid, i.get_name()) # And now we export the files. for candidate in pous: # We create a list of objects to export: # The object itsself objects = [candidate] # And sub-objects (POUs can have actions, properties, ...) objects.extend(candidate.get_children()) # And the parent folders. parent = candidate.parent while ((not parent.is_root) and parent.is_folder): objects.append(parent) parent = parent.parent # Create an unique file name: if len(sys.argv) == 1: filename = "parent\\%s.export" % (candidate.get_name()) else: filename = "%s\\%s.export" % (sys.argv[1],candidate.get_name()) # print some user information print("exporting ", len(objects), " objects to: ", filename) # and actually export the project. proj.export_xml(objects, filename) proj.close() print ("script finished.") System.exit(0) // Dont work .NET: public static void Export(string path,string proj) { if (checkSettings()) { var p = new System.Diagnostics.Process(); p.StartInfo.FileName = Properties.Settings.Default.CSVersion +"\\CODESYS\\Common\\CODESYS.exe"; p.StartInfo.Arguments = " --Profile=" + qoute(Properties.Settings.Default.CSProfile) + " --culture=en" + " --project=" + qoute(path + "\\" + proj) + " --runscript=" + Properties.Settings.Default.LastOpenProjectPath + "\\INPUT_DATA\\SCRIPT\\Export.py" + " --scriptargs:" + qoute(path) ; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.UseShellExecute = false; p.StartInfo.CreateNoWindow = false; p.Start(); p.StandardOutput.ReadToEnd(); p.CloseMainWindow(); p.Close(); } }
Last updated: 2024-01-16

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 c3po on Visualisierung wechseln über SPS Variable Codesys 3.5 ^{CODESYS Forge talk (Post)}
kann das bitte noch mal jemand genauer beschreiben? Der Link funktioniert nicht, weil Codesys so schlau war seine Onlinehilfe abzuschalten. Das denen das nicht peinlich ist -.-
Last updated: 2024-08-26

Post by arwie on Shared memory between Python and Codesys ^{CODESYS Forge talk (Post)}
Hi, I wrote a tutorial how to do this. Fast variable exchange between CODESYS and PYTHON via shared memory: https://gist.github.com/arwie/ff56783d9a2fff52940de82ae1bc1a22
Last updated: 2024-10-04

Post by arwie on Read bytes from Codesys runtime into external Python script ^{CODESYS Forge talk (Post)}
Hi, I wrote a howto setup shared memory between CODESYS and Python. Working example code is linked. Fast variable exchange between CODESYS and PYTHON via shared memory: https://gist.github.com/arwie/ff56783d9a2fff52940de82ae1bc1a22
Last updated: 2024-10-04

Post by fil on Using Latch Variable in Alarm as input from text list ^{CODESYS Forge talk (Post)}
Good morning, I am currently working on a project where this would be of enormous value. Any input would be very welcome - thanks in advance. Best regards Fil
Last updated: 2025-03-06

Post by pernockham on Persistence Manager: Config File not found? ^{CODESYS Forge talk (Post)}
Confirmed. Variable types that should be excluded: BIT Pointer Interfaces Constants Arrays of non-persistent data types Docs: https://content.helpme-codesys.com/en/CODESYS%20Application%20Composer/ac_pm_definition_persistent_variables.html
Last updated: 2025-08-24

Post by leonekreiger on Persistence Manager: Config File not found? ^{CODESYS Forge talk (Post)}
Confirmed. Variable types that should be excluded: BIT Pointer Interfaces Constants Arrays of non-persistent data types Docs: https://content.helpme-codesys.com/en/CODESYS%20Application%20Composer/ac_pm_definition_persistent_variables.html Thank you, I have successfully fixed that error.
Last updated: 2025-09-26

Post by dogulas on numeric text box control ^{CODESYS Forge talk (Post)}
I am using TargetVisu in my v3.5 sp20 p6 (64-bit) project. I see no control that will allow me to bind, edit, and display a LREAL variable. Am I missing a library? If it exists, why can't I see it?
Last updated: 2025-10-02

Post by reinier-geers on Axis declare ^{CODESYS Forge talk (Post)}
In motioncontrol every block start with Axis. How can i make a variable to make my own FB ? Somthink like : _Axe : pointer to Axis_Ref_MC := Axis_1 ;
Last updated: 2024-02-13

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