Post by dkugler on Webvisu client connection monitoring ^{CODESYS Forge talk (Post)}
you can give this code snippet a try. It's extracted and simplyfied from my code: Install VisuElemBase lib if not installed yet. Execute in visu task: VAR pClientData : ARRAY [-1..100] OF POINTER TO VisuElemBase.VisuStructClientData; END_VAR VisuElemBase.g_ClientManager.BeginIteration(); pClientData := VisuElemBase.g_ClientManager.GetNextClient(); WHILE pClientData <> 0 DO pClientData[pClientData^.GlobalData.GlobalClientID] := pClientData; END_WHILE You have to make shure every no longer updated pointers in the array have to be deleted and no longer used by your code! Usage of this pointer access at your own risk :-) Works with SP16. From SP17 and newer there will be warnigs etc. using this solution as I remember. It will be great, if Codesys publishes a example or give a hint how to accesse this client values with the VisuUtil lib or other future-proof way!
Last updated: 2024-09-09

Post by opineiro on Stack overflow with really simple function ^{CODESYS Forge talk (Post)}
Hi, I have an issue with a function which sends a message through API Rest. I'm using a function from httpCLient library. I have tested this function inside a program and it works fine. But when I want to use it inside a function (so I can call it simultaneously from 2 different points on the main program) it gives a stack overflow error. In detail it says: "C0297 Stack Overflow on Main Task. Stack sizes... Call hierarchy:" I have simplified as much as I can the function, but I'm hitting a wall with this. Anybody has an idea of what's wrong? Thanks!
Last updated: 2024-09-16

Post by climblinne on OPC UA Method - How to wait for result? ^{CODESYS Forge talk (Post)}
Hello, I am already able to run an OPC UA method in Codesys. Now my question, how can I interact with other tasks (e.g. read an SDO from EtherCAT and return it by the function)? The OPC UA method seems to be called only once (I tried to return BOOL or UINT values). Up to now I only found to do a while loop to wait for the result of the other task. Is there a better way to do it? Is this the way OPC UA functions should be used (for "not too long" function calls) or should I use another mechanism (method: Start, event: Finish, method: getResult)? Regards
Last updated: 2025-01-13

Post by elsmart on How to create custom visualisation components (widgets)? ^{CODESYS Forge talk (Post)}
Hello I'm currently working on a project where I need to implement visualisation in Codesys on Raspberry Pi via web browser. I'm uing Codesys IDE V. 3.5 and I was able to successfully run my program and visualisation using generic elements provided by Codesys on Raspberry Pi Compute Module 4. However I am dissatisifed by the limiations and looks of generic elements. I would like to create my own components for this specific task (like cyclic buffer with messege boxes or matrix of data structures). How do people develop their own visualisation components in Codesys and how to implement them in a project?
Last updated: 2025-05-27

Post by buczekj on About CPU Loading ^{CODESYS Forge talk (Post)}
This is a phenomenon that I have seen myself and with others. Texas instruments wrote an application note with this same issue. They noted with Codesys 3.5.19.10, that selecting CPU 1 as the EtherCAT task showed CPU spiking improvements over the performance of cores 0, 2, and 3. It appears to be linked to EtherCAT, are you configuring for use with distributed clocks? If so, I recommend choosing the 'Based on Input Reference' option. I have found it to reduce the CPU usage spike maximum slightly (see attached). See link to TI (also attached in case link breaks) https://www.ti.com/lit/an/spradh0/spradh0.pdf?ts=1723546111357
Last updated: 2025-07-01

Post by fedex03 on Read Global Variable from an IoT Device ^{CODESYS Forge talk (Post)}
Hello everyone, I am new to the forum, and to programming with CodeSys. I am dealing with IoT device for industry and I should check if a device is able to read/write global variables in an EtherNet/IP Master. Since I do not have an EtherNet/IP PLC, I thought of using CodeSys as a softPLC. I created a program with a set of global variables (GVL) and a task that increments them. I would like to know if I need to enable any options so that the global variables can be read by IoT devices. My device supports Class 2 Class (Explicit Messaging Connection) communication. Thank you in advance for your help.
Last updated: 2025-07-22

Post by jzhvymetal77 on IecVarAccessLibrary.IBaseTreeNode methon ^{CODESYS Forge talk (Post)}
I got this code working again. 3S/CoDeSys, your level of obfuscation and lack of documentation turns a simple task into a monumental complex challenge. The issue was that at some point the IecVarAccessLibrary changed and no longer allowed using IBaseTreeNode to retrieve a child or the number of children. The attached code has been updated to use IIecVarAccess6.VarAccBrowseGetChildByIndex instead. The code was also cleaned up but is still a work in progress. The current example only works one layer deep. This means native data types, arrays, and single-layer structures are supported. However, structure arrays and nested structures are not yet supported.
Last updated: 2025-08-25

Post by vformanek on irq-set piority is not working in plc-shell ^{CODESYS Forge talk (Post)}
Hello, I am currently having issues on CODESYS Control for linux SL with DTH expiring. I have followed several tutorials of creating a proper RT linux. Then I further configured the linux based on this tutorial: https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_performance_optimization.html Currently I am getting DHT expires in the communication and I am trying to increase of the priority of the network task which manages the PROFINET network adapter. I am following this tutorial: https://content.helpme-codesys.com/en/CODESYS%20PROFINET/_pnio_trouble_connection_failure.html But the irq-set is not changing the priority. See the image bellow....
Last updated: 2024-01-05

Post by davidbo on Does the new license policy means I have to upgrade everything? ^{CODESYS Forge talk (Post)}
We have several old project written with 3.5.17 and 3.5.18 and also some older Until now when a customer ordered a product from us. We just installed (we have a tested image) and added a license Now the license policy has changed and we have to buy a License Control Basic S or M However it only works with CODESYS Development System Version 3.5.19.10 or higher Does that mean we have to upgrade all our old products? That is not a simple task as a previous post has explained with weird error messages from CODESYS V3.5. Next we have to do rigorous testing of our applications afterwards. It is very expensive
Last updated: 2024-01-11

Post by timvh on CODESYS V3.5 SP15 Patch 2 won't open ^{CODESYS Forge talk (Post)}
This is almost always related to previously working with an additonal monitor. If you have placed CODESYS on that monitor, later start your laptop again and open CODESYS without that monitor, then Windows still places it in the previous position, but then it is not visible. So the solution by cehermanstad can be used to move it to the main screen to make it visible again. PS, another way to move it, is by pressing SHIFT and then right-click on the icon in the task bar, then select move. You can then move it with the arrow keys or your mouse.
Last updated: 2024-02-27

Post by david24 on Map in Codesys ^{CODESYS Forge talk (Post)}
Hello everyone, I have the task of programming a map. With the help of the visualization element "Table", I have managed to accomplish this. In the Input Configuration, I activated the option: "Write Variables", so that the user can change the values in the map. To test the program, I select the Online Mode (Simulation).There I change the values in the map. When restarting the program in CODESYS, the changes in the map are no longer there. Does anyone know an approach how to save the changes in the map? Thank you for your support Best regards David
Last updated: 2024-04-02

Post by francesco86 on Script python for write in a file Project information ^{CODESYS Forge talk (Post)}
Dear all, My python script can read a Codesys project and save in file the different POU, but the problem is that I don't able to read the project info from the obj list. Following of this message there is my python script. Can you help my? Best regards Francesco # encoding:utf-8 # We enable the new python 3 print syntax from __future__ import print_function import os import shutil import time import sys from datetime import datetime print("--- Saving files in the project: ---") print("sys.argv: ", len(sys.argv), " elements:") for arg in sys.argv: print(" - ", arg) if (len(sys.argv)>1): folderExportName = sys.argv[1] print(" folderExportName: ", folderExportName) exportPath = sys.argv[2]+ sys.argv[3]+ "\\"+ sys.argv[1] print(" File path: ", exportPath) # git has_repo=False #save_folder=r'E:\Tmp\ControlPlugins\ControlPlugins\Export' save_folder = exportPath if not os.path.exists(save_folder): os.makedirs(save_folder) else: a=os.listdir(save_folder) for f in a: if not f.startswith("."): sub_path= os.path.join(save_folder,f) if os.path.isdir(sub_path): shutil.rmtree(sub_path) else: os.remove(sub_path) elif f==".git": has_repo=True info={} type_dist={ '792f2eb6-721e-4e64-ba20-bc98351056db':'pm', #property method '2db5746d-d284-4425-9f7f-2663a34b0ebc':'dut', #dut 'adb5cb65-8e1d-4a00-b70a-375ea27582f3':'lib', #lib manager 'f89f7675-27f1-46b3-8abb-b7da8e774ffd':'m', #method no ret '8ac092e5-3128-4e26-9e7e-11016c6684f2':'act', #action '6f9dac99-8de1-4efc-8465-68ac443b7d08':'pou', #pou '6654496c-404d-479a-aad2-8551054e5f1e':'itf', #interface '738bea1e-99bb-4f04-90bb-a7a567e74e3a':'', #folder 'ffbfa93a-b94d-45fc-a329-229860183b1d':'gvl', #global var '5a3b8626-d3e9-4f37-98b5-66420063d91e':'prop', #property '2bef0454-1bd3-412a-ac2c-af0f31dbc40f':'tl', #textlist '63784cbb-9ba0-45e6-9d69-babf3f040511':'gtl', #global textlist '225bfe47-7336-4dbc-9419-4105a7c831fa':'dev', #device 'ae1de277-a207-4a28-9efb-456c06bd52f3':'tc', #task configuration 'f8a58466-d7f6-439f-bbb8-d4600e41d099':'m', #method with ret '261bd6e6-249c-4232-bb6f-84c2fbeef430':'gvl', #gvl_Persistent '98a2708a-9b18-4f31-82ed-a1465b24fa2d':'task', #task '085afe48-c5d8-4ea5-ab0d-b35701fa6009':'progInfo'#project information }; def save(text,path,name,tp): if not tp: tp='' else: tp='.'+tp+'.txt' with open(os.path.join(path,name+tp),'w') as f: f.write(text.encode('utf-8')) def print_tree(treeobj, depth, path): global info #record current Path curpath=path isfolder=False t='' #text tp='' #type # get object name name = treeobj.get_name(False) id = treeobj.type.ToString() if id in type_dist: tp = type_dist[treeobj.type.ToString()] #Print all type of objects #print("--Name: ", tp) else: info[id]=name if treeobj.is_device: deviceid = treeobj.get_device_identification() t = 'type='+str(deviceid.type) +'\nid=' +str(deviceid.id) + '\nver='+ str(deviceid.version) if tp == "progInfo": print("-- There is prog info, ", tp) print("-- It has textual declaration: , ", treeobj.has_textual_declaration) print("-- It has textual implementation: , ", treeobj.has_textual_implementation) print("-- It is folder: , ", treeobj.is_folder) print("-- It is children: , ", treeobj.get_children(False)) print("-- It is children len: , ", len(treeobj.get_children(False))) print("-- It is progInfo type: , ", type(treeobj.ScriptProject)) #for child in treeobj.get_children(False): # print_tree(child, depth+1,curpath) try: if treeobj.is_folder : #system.ui.prompt('folder:'+u, PromptChoice.YesNo, PromptResult.Yes) isfolder=true pass except: pass if treeobj.has_textual_declaration : t=t+'(*#-#-#-#-#-#-#-#-#-#---Declaration---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' a=treeobj.textual_declaration t=t+a.text if treeobj.has_textual_implementation: t=t+'(*#-#-#-#-#-#-#-#-#-#---Implementation---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' a=treeobj.textual_implementation t=t+a.text if treeobj.has_textual_declaration and not treeobj.has_textual_implementation: t=t+'(*#-#-#-#-#-#-#-#-#-#---NOT Implementation visible---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' if treeobj.is_task : exports=[treeobj] projects.primary.export_native(exports,os.path.join(curpath,name+'.task')) if treeobj.is_libman: exports=[treeobj] projects.primary.export_native(exports,os.path.join(curpath,name+'.lib')) if treeobj.is_textlist: treeobj.export(os.path.join(curpath,name+'.tl')) children = treeobj.get_children(False) if children or isfolder: if tp: curpath=os.path.join(curpath,name+'.'+tp) else: curpath=os.path.join(curpath,name) if not os.path.exists(curpath): os.makedirs(curpath) if t: save(t,curpath,name,tp) for child in treeobj.get_children(False): print_tree(child, depth+1,curpath) for obj in projects.primary.get_children(): print_tree(obj,0,save_folder) with open(os.path.join(save_folder,'ExportInfo.txt'),'w') as f: now = datetime.now() infTimeExecution = now.strftime("%Y-%m-%d %H:%M:%S") f.write("Export date and time: "+infTimeExecution + "\r\n" + str(info)) print("--- Script finished. ---") #system.ui.info('save ok') projects.primary.close()
Last updated: 2024-04-30

Post by francesco86 on Script python for write in a file Project information ^{CODESYS Forge talk (Post)}
Dear all, My python script can read a Codesys project and save in file the different POU, but the problem is that I don't able to read the project info from the obj list. Following of this message there is my python script. Can you help my? Best regards Francesco # encoding:utf-8 # We enable the new python 3 print syntax from __future__ import print_function import os import shutil import time import sys from datetime import datetime print("--- Saving files in the project: ---") print("sys.argv: ", len(sys.argv), " elements:") for arg in sys.argv: print(" - ", arg) if (len(sys.argv)>1): folderExportName = sys.argv[1] print(" folderExportName: ", folderExportName) exportPath = sys.argv[2]+ sys.argv[3]+ "\\"+ sys.argv[1] print(" File path: ", exportPath) # git has_repo=False #save_folder=r'E:\Tmp\ControlPlugins\ControlPlugins\Export' save_folder = exportPath if not os.path.exists(save_folder): os.makedirs(save_folder) else: a=os.listdir(save_folder) for f in a: if not f.startswith("."): sub_path= os.path.join(save_folder,f) if os.path.isdir(sub_path): shutil.rmtree(sub_path) else: os.remove(sub_path) elif f==".git": has_repo=True info={} type_dist={ '792f2eb6-721e-4e64-ba20-bc98351056db':'pm', #property method '2db5746d-d284-4425-9f7f-2663a34b0ebc':'dut', #dut 'adb5cb65-8e1d-4a00-b70a-375ea27582f3':'lib', #lib manager 'f89f7675-27f1-46b3-8abb-b7da8e774ffd':'m', #method no ret '8ac092e5-3128-4e26-9e7e-11016c6684f2':'act', #action '6f9dac99-8de1-4efc-8465-68ac443b7d08':'pou', #pou '6654496c-404d-479a-aad2-8551054e5f1e':'itf', #interface '738bea1e-99bb-4f04-90bb-a7a567e74e3a':'', #folder 'ffbfa93a-b94d-45fc-a329-229860183b1d':'gvl', #global var '5a3b8626-d3e9-4f37-98b5-66420063d91e':'prop', #property '2bef0454-1bd3-412a-ac2c-af0f31dbc40f':'tl', #textlist '63784cbb-9ba0-45e6-9d69-babf3f040511':'gtl', #global textlist '225bfe47-7336-4dbc-9419-4105a7c831fa':'dev', #device 'ae1de277-a207-4a28-9efb-456c06bd52f3':'tc', #task configuration 'f8a58466-d7f6-439f-bbb8-d4600e41d099':'m', #method with ret '261bd6e6-249c-4232-bb6f-84c2fbeef430':'gvl', #gvl_Persistent '98a2708a-9b18-4f31-82ed-a1465b24fa2d':'task', #task '085afe48-c5d8-4ea5-ab0d-b35701fa6009':'progInfo'#project information }; def save(text,path,name,tp): if not tp: tp='' else: tp='.'+tp+'.txt' with open(os.path.join(path,name+tp),'w') as f: f.write(text.encode('utf-8')) def print_tree(treeobj, depth, path): global info #record current Path curpath=path isfolder=False t='' #text tp='' #type # get object name name = treeobj.get_name(False) id = treeobj.type.ToString() if id in type_dist: tp = type_dist[treeobj.type.ToString()] #Print all type of objects #print("--Name: ", tp) else: info[id]=name if treeobj.is_device: deviceid = treeobj.get_device_identification() t = 'type='+str(deviceid.type) +'\nid=' +str(deviceid.id) + '\nver='+ str(deviceid.version) if tp == "progInfo": print("-- There is prog info, ", tp) print("-- It has textual declaration: , ", treeobj.has_textual_declaration) print("-- It has textual implementation: , ", treeobj.has_textual_implementation) print("-- It is folder: , ", treeobj.is_folder) print("-- It is children: , ", treeobj.get_children(False)) print("-- It is children len: , ", len(treeobj.get_children(False))) print("-- It is progInfo type: , ", type(treeobj.ScriptProject)) #for child in treeobj.get_children(False): # print_tree(child, depth+1,curpath) try: if treeobj.is_folder : #system.ui.prompt('folder:'+u, PromptChoice.YesNo, PromptResult.Yes) isfolder=true pass except: pass if treeobj.has_textual_declaration : t=t+'(*#-#-#-#-#-#-#-#-#-#---Declaration---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' a=treeobj.textual_declaration t=t+a.text if treeobj.has_textual_implementation: t=t+'(*#-#-#-#-#-#-#-#-#-#---Implementation---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' a=treeobj.textual_implementation t=t+a.text if treeobj.has_textual_declaration and not treeobj.has_textual_implementation: t=t+'(*#-#-#-#-#-#-#-#-#-#---NOT Implementation visible---#-#-#-#-#-#-#-#-#-#-#-#-#*)\r\n' if treeobj.is_task : exports=[treeobj] projects.primary.export_native(exports,os.path.join(curpath,name+'.task')) if treeobj.is_libman: exports=[treeobj] projects.primary.export_native(exports,os.path.join(curpath,name+'.lib')) if treeobj.is_textlist: treeobj.export(os.path.join(curpath,name+'.tl')) children = treeobj.get_children(False) if children or isfolder: if tp: curpath=os.path.join(curpath,name+'.'+tp) else: curpath=os.path.join(curpath,name) if not os.path.exists(curpath): os.makedirs(curpath) if t: save(t,curpath,name,tp) for child in treeobj.get_children(False): print_tree(child, depth+1,curpath) for obj in projects.primary.get_children(): print_tree(obj,0,save_folder) with open(os.path.join(save_folder,'ExportInfo.txt'),'w') as f: now = datetime.now() infTimeExecution = now.strftime("%Y-%m-%d %H:%M:%S") f.write("Export date and time: "+infTimeExecution + "\r\n" + str(info)) print("--- Script finished. ---") #system.ui.info('save ok') projects.primary.close()
Last updated: 2024-04-30

Post by cfam on Codesys Control for PLCnext (PLC - AXL F 2152) ^{CODESYS Forge talk (Post)}
Good day All I would like to share some information on this site for the Codesys team as well for the future members using Codesys Control for PLCnext if it is allowed. I hope that i Post it in the correct spot. Subject: Codesys, Codesys Control for PLCnext Objective: Using the following Phoenix components to built a PLC Rack and run it on Codesys: Hardware and Software used 1. 2404267, AXC F 2152 - Controller 2. 1088136, AXL F BP SE6 - Module carrier 3. 1088129, AXL SE DO16/1 - Digital module 4. 1337224, AXL SE PD16 GND - Potential distributors 5. 1088127, AXL SE DI16/1 - Digital module 6. 1337223, AXL SE PD16 24V - Potential distributors 7. 1088123, AXL SE AO4 I 4-20 - Analog module 8. 1088134, AXL SE SC-A - Cover 9. Codesys v3.5 SP19 Patch 4 10. Codesys Control for PLCnext V4.10.0.0 Process: Firstly I built the Rack according to the Phoenix Project+ Software tool. Where I rebuilt it onto my test bench . I used the PLCnext Engineer IDE from Phoenix and all Communications where up and running and my PLC program executed successfully. THEN I tried the same PLC Layout with Codesys and Codesys Control for PLCnext. It was not successful and gave me the "Error: Local Bus not Running". I searched the web for answers but was unsuccessful in finding a solution. So I tried to change my configuration and found that the following Modules COULD NOT be recognized by Codesys Control. The result was that the Local Bus Failed to run. 1337224, AXL SE PD16 GND - Potential distributors 1337223, AXL SE PD16 24V - Potential distributors Example 1, Resulted in "Error: Local Bus Not Running": Module carrier slot 1: 1088129, AXL SE DO16/1 - Digital module Module carrier slot 2: 1337224, AXL SE PD16 GND - Potential distributors Module carrier slot 3: 1088127, AXL SE DI16/1 - Digital module Module carrier slot 4: 1337223, AXL SE PD16 24V - Potential distributors Module carrier slot 5: 1088123, AXL SE AO4 I 4-20 - Analog module Module carrier slot 6: 1088134, AXL SE SC-A - Cover Example 2, Result "Successful": Module carrier slot 1: 1088129, AXL SE DO16/1 - Digital module Module carrier slot 2: 1088127, AXL SE DI16/1 - Digital module Module carrier slot 3: 1088123, AXL SE AO4 I 4-20 - Analog module Module carrier slot 4: 1088134, AXL SE SC-A - Cover Module carrier slot 5: 1088134, AXL SE SC-A - Cover Module carrier slot 6: 1088134, AXL SE SC-A - Cover Result: Codesys or Codesys Control for PLCnext, has a PROBLEM to identify the following Modules. 1. AXL SE PD16 24V - Potential distributors 2. AXL SE PD16 GND - Potential distributors Hope that this information could be useful in future. Best regards Jaco Pretorius
Last updated: 2023-12-06

Post by ryandmg on Web Client (HMI) Disconnects from Webvisu (Weidmuller u-OS) ^{CODESYS Forge talk (Post)}
Thanks So Much for the reply! Were using the Weidmuller UV66-ADV-10-CAP-W The HMI is pointed to the URL which is assigned through u-OS. Basically when you log into the controller's webserver via browser you can view the installed apps. One of which is the Codesys runtime. When you click on that it takes you to the visualization. That corresponding url is what the HMI is looking for. I apologize I don't have that on hand as I'm in the office right now. I don't think I tried connecting using the port you mentioned and https in lieu of the u_OS URL. I can certainly try. Out of the box the u-OS is set for HTTP. Since we're isolated I havent changed that yet. When this has happened while logged on via chrome on my laptop, simply refreshing brings the visualization right back. In the case of the HMI in kiosk mode, we power cycle the HMI to force a reconnect, log back in u-OS and the visualization is back.
Last updated: 2023-09-06

Post by danwoodlock on RPI Zero w - Edge gateway cant install ^{CODESYS Forge talk (Post)}
Hello all, First post. I recently acquired an RPI zero W from amazon, and have been using it with Codesys v3.5 SP19 patch 2. I first got it working yesterday, and after installing the runtime on the Pi, I was prompted to install the edge gateway. Installation of the edge gateway failed because of unsupported architecture, undeterred I was able to connect to the pi and program as I wanted. The issue I've noticed is that if I do not load anything to the pi overnight, I can then no longer connect to the pi and download, although I can still ping it from my pc. I found that if I power cycle the PI, I am then able to connect again, and it works as normal. I did some googling and found instances where people recommended downloading the newest edge gateway, which brings me here. Wondering if there are any suggestions, or if this is a known issue. I actually tried installing all 3 versions of edge gateway for science, but all fail with the same message. Thanks -Dan
Last updated: 2023-09-13

Post by riccardo on VisuElems.CurrentUserGroupId is not stable ^{CODESYS Forge talk (Post)}
GoodMorning everyone. I have a system that, in case of alarm, have to block. When the operator logs in must have to acknoledge the alarm and should operate in the system freely. To perform this I detect the logged User by (VisuElems.CurrentUserGroupID <> 0) with a similar code to the the following: PROGRAM AlarmMngt VAR alarm : BOOL:= FALSE; Ack : BOOL:= TRUE; PushBottonOpening : BOOL:= FALSE; Valve : BOOL := FALSE; Flag: BOOL := FALSE; END_VAR IF alarm AND Ack AND (NOT Flag) THEN valve := FALSE; PushBottonOpening := FALSE; Ack := FALSE flag := TRUE; ELSIF (NOT alarm) AND Ack THEN flag := FALSE; END_IF (* if the system is in alarm but there is a logged operator that acknowledge the alarm the system allows the valve opening.*) IF (VisuElems.CurrentUserGroupID <> 0) AND Ack AND Alarm AND PushBottonOpening THEN Valve := TRUE; ELSIF (VisuElems.CurrentUserGroupID = 0) AND Alarm THEN valve := FALSE; END_IF The problem I have is in the last 5 lines of the code: Even if there is a logged in user, the GroupID variable is subjected to a refresh that cyclically set for an instant it to 0 and this close the valve making difficult to the user to work Now I solved it creating a time hysteresys cycle but it is not a good solution. Someone is able to explane me why the GroupID variable is sobjected to this refresh and how to stabilize to avoiding it? Thank you in advance, Riccardo
Last updated: 2023-11-10

Post by trusty-squire on Confused by dwIpoTime input for SMC_Interpolator ^{CODESYS Forge talk (Post)}
Hi, Learning Codesys CNC, and I am confused by the dwIpoTime parameter. I have a basic demo application, using SMC_Interpolator feeding into SMC_TRAFO_Gantry2Tool2, which then sets the position of the x/y SM_Drive_Virtual axis. I also have a C axis which revolves the tool, which is controlled using a simple tangential angle calculation SMC_CalcDirectionFromVector. The GCode I'm using has feed/accel set at 500. The axis configuration limits are well above that (2000). What's strange is that, when I run the simulation, the feed speed changes drastically when I update the variable dwIpoTime. The larger the number, the faster it moves. What's going on here? The documentation only says "This variable has to be set for each call. It represents the cycle time in μsec." Why does it change the feed speed I'm seeing the in simulation? What is a good number to use? The example I was looking at set it at 5000. Screenshot attached.
Last updated: 2024-07-18

Post by edvard-munch on How I can get "Done flag" for "Modbus Slave Channel"? ^{CODESYS Forge talk (Post)}
This is from 10 years ago, I know. But I have been using (SLAVE_DEVICE.iChannelIndex = CHANNEL_NUMBER) AND (SLAVE_DEVICE.xDone) I suppose that it shows xDone for the channel that shows up in the iChannelIndex at the same cycle? It seems to be working properly for two devices that I have been using it before But now I have another device and using two write channels, for one register each. One channel works properly and returns DONE flag When another channel is triggered, I see that it shows up in iChannelIndex, but flag DONE not received, but no Error for the channel. Also, when i check the register in the device it's evident that data has been transferred. Is this could happen sometimes with CODESYS, so DONE flag not received? Or this is a problem with a given device? With this certain register
Last updated: 2024-12-19

Post by mp9876 on Problem using MeasureFrequence FB ^{CODESYS Forge talk (Post)}
Hi everyone, new at Codesys and PLC programming in general. I am using Codesys Win V3.5 SP20 I would like to measure an encoder's frequency output (obtaining that pulse train from Factory IO) and intended to use the MeasureFrequence FB (Intern/CAA/Utilities/CAA Mathematics/3.5.19.0). As mentioned in the title what I need to measure is low frequency, such as lower than 40hz (a cycle every 25mS) or so; I could even go lower frequency if required as this is for test purposes) therefore I am not expecting problem measuring a low frequency with that FB The library in question appears to be installed as I can retrieve it from the Library Repository. I can also see it from the Device's Library Manager. Problem arises when I am trying to instantiate this particular FB. I go like this: VAR MeasF:MeasureFrequence; END_VAR Please note that as soon as I start typing the "MeasureFrequence", the MeasureFrequence comes out as a viable option in auto-typing; seems to indicate that the FB is recognized somehow. But there is no way I can compile this as it comes back with the following: C0046: Identifier 'MeasureFrequence' not defined. Tried to rename that to ABC instead of MeasF; same issue. Possibly that the library is not properly installed ? Placeholder ? I would greatly appreciate a bit of guidance if possible. Thank you and regards, Mike
Last updated: 2024-06-24

Post by jonasz on Deploy LicenseServer for Linux SL ^{CODESYS Forge talk (Post)}
Good morning, I'm digging into this topic because I'm curious about resolving my problem in a test environment. In my previous message, I asked about the CODESYS Safe Timeprovider SL package (4.18.0.0), which I saw in the illustration. I noticed that it runs as a service. I am asking about this because from the perspective of an "ordinary" user, this service provides easier access to the settings of the time provider's operating parameters. The basic time provider configuration is outlined at https://content.helpme-codesys.com/en/CODESYS%20Control/_rtsl_virtual_safe_time_provider.html. Why my questions? They stem from my specific case, which is experiencing timeout issues. I know that my environment is currently only a test environment. I'm assuming a real-world scenario in which I won't be able to achieve a better result with my configuration, and I will ultimately need to increase the time provider's cycle time. By running the time provider service, I can easily influence the time provider's operation and thus eliminate the problem. I know, I know, safety systems are not life-enhancing extras.
Last updated: 2025-11-19

Post by mrkm-dic on CODESYS: Combining Master Redundancy with EtherCAT Ring Topology – Is it Supported? ^{CODESYS Forge talk (Post)}
Hello, I would like to ask whether it is technically supported (and practically achievable) to combine CODESYS Master Redundancy with EtherCAT ring (loop) redundancy in the same system. System setup CODESYS version: CODESYS 3.5.21.40 CODESYS Control SL for Weidmuller u-OS-4.12.2.0 Controllers (Masters): Weidmuller UC20-M4000 ×2, configured as Active / Standby using CODESYS redundancy EtherCAT Slaves: Weidmuller UR20-FBC-EC ×3, supporting EtherCAT ring / line break detection Topology: EtherCAT ring (loop) Main question Is it officially supported to use: ・CODESYS PLC/Master redundancy (Active/Standby) and ・EtherCAT ring topology (for cable redundancy) at the same time? Expected behavior Our expectation is: ・When the Active PLC fails, the Standby PLC becomes Active ・The Standby PLC then takes over the role of EtherCAT Master ・EtherCAT communication is re-established ・I/O control continues after reinitialization (a short interruption is acceptable; no strict bumpless requirement) We do not expect completely seamless / zero-cycle switchover, but we want to understand: ・Whether this combination is supported by design ・Or whether there are known limitations or restrictions when EtherCAT ring mode is used together with Master redundancy Clarification At this stage, the question is mainly about feasibility and support, not about a specific error message yet. Any official guidance, limitations, or real-world experience would be greatly appreciated. Thank you in advance.
Last updated: 2026-02-05

Post by annd on Migration von "CODESYS Control for PFC200 SL" zu WAGO FW26 "CODESYS V3.5.19.2" ^{CODESYS Forge talk (Post)}
Hallo, da Wago nun von eCockpit zum offenen "CODESYS Development System V3" wechselt, möchte ich meinen bestehenden 750-8212 von der PFC200 SL auf die Wago Firmware umstellen. Welche Schritte sind dabei notwendig? Den Controller würde ich auf die aktuelle FW 26 updaten und die 3.5.19.2 von Wago mit den Descriptions verwenden. Reicht es im Codesys Projektbaum mit "Gerät aktualisieren" auf den Wago Controller zu wechseln? Es wird dann statt dem "Pfc200Bus"ein leerer K-Bus und ein leerer Com-Port angezeigt. Müssen die einzelnen Module dann darunter neu angelegt und alle E/A Variablen manuell neu eingetragen werden? Das exportieren und danach wieder importieren funktioniert nicht, weil die Namen bzw. Adressen unterschiedlich sind. Ist das so richtig? Kann der Block "Modbus_COM_Port - Modbus_Master_COM_Port - Modbus_Slave" so bleiben wie bisher oder muss das auch unter dem neuen COM-Port neu angelegt werden? Für ein paar Hinweise wäre ich dankbar. Schöne Grüße, annD
Last updated: 2023-11-17

Post by ahuckphin on Issues with Modbus Slave with Raspberry Pi ^{CODESYS Forge talk (Post)}
I have a DFRobot RS485 temperature & humidity sensor (SEN0438) connected to my Raspberry Pi via a USB to RS485 adapter. I am able to connect and read the sensor data when running a python code locally. However in Codesys, I encounter this error "A bus error has occurred." and "There was no response in time". Could this be because of Modbus Server Channel and Modbus Server Init configuration on my part? Admittedly I am new to Codesys. To get to this stage, I: 1. added some lines to CODESYSControl_User.cfg 2. added "Modbus_COM" in Codesys and set "Serial Port Configuration" under "General" 3. added "Modbus_Master_COM_Port" in Codesys and checked transmission mode is set to "RTU" 4. added "Modbus_Slave_COM_Port" in Codesys and checked server address is set to 1 (also set 1 in my sensor) 5. added 1 channel and 1 init for "Modbus_Slave_COM_Port" under "Modbus Server Channel" and "Modbus Server Init"
Last updated: 2024-07-10

Post by andrax on Bosch BME 280 bzw 688 Sensor per I2C Bus steuern und Daten in Codesys verarbeiten ^{CODESYS Forge talk (Post)}
Die Geräte Bibliothek von Stefan Dreyer ist dafür gedacht, um Treiber für deine Sensoren zu erstellen, damit sie an einem MUX-Board betrieben werden können. Auch ist ein Betrieb ohne MUX-Board möglich. Der Aufbau ist relativ einfach und besteht aus folgenden Komponenten: -Initialize (hier wird die .devdesc.xml eingelesen) -BeforeWriteOutputs (ruft initDevice auf und ist für ausgehende Signale gedacht) -initDevice (initialisiert den Sensor) -AfterReadInputs (Selbsterklärend, Werte einlesen und Signalkonversation) Bei meinen Sensoren habe ich es immer so gemacht. Zuerst habe ich mit die .devdesc.xml gebaut bzw. eine Vorlage umgeschrieben, wobei Parameter 1-10 für ein Mux-Board reserviert sind. In der .devdesc.xml definierst du alle wichtigen Parameter für den Sensor. Danach schreibst du die Initialize und liest die Werte ein. InitDevice ist Fleißarbeit. Für die meisten Sensoren liegt immer ein Pythonscript oder was in C bei. Du gehst die Scripte durch und baust es in Codesys nach. Im letzten Schritt baust du die AfterReadInputs. Signale einlesen und Conversation. Du solltest dir auch ein I2C-Logic Analyzer zulegen. Da Teil ist sehr hilfreich um die I2C Kommunikation mitzulesen. Wenn es irgendwo klemmt, siehst du sofort an welcher Stelle du suchen musst. Ich hab hier den AZ-Delivery Logic Analyzer! Grüße Andre
Last updated: 2025-01-11

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