Post by ph0010421 on Axis EtherCAT address ^{CODESYS Forge talk (Post)}
Hello SDO will write to the drive, not the axis, so you need to pass in the ethercat slave: VAR_IN_OUT Axis: IoDrvEthercatLib.ETCSlave; END_VAR Then you can get the address with: Axis.PhysSlaveAddr (as UINT)
Last updated: 2025-03-07

Post by paulorb on STRUCT AT %MW1000 ^{CODESYS Forge talk (Post)}
Hi I am trying to use STRUCT to parse commands from Modbus/TCP, Modbus client will fill the bytes related to a specific command (type, parameters), then PLC (Codesys) will access the command parameters. A STRUCT will simplify a lot the process of parsing the data, so I don't need to parse byte per byte, address will be mapped to a struct and I can use it for parsing the data. From what I understood, the compiler does not allow me to specify the location of the struct for a %MW register. VAR_COMMAND AT %MW1002: structGenericModbusCommand; This will throw: Bad declaration, use '%ML' for 'structGenericModbusCommand' variable But If I change it to %ML, when you go online you see that it is actually allocating the struct in another memory address. When we go online, on GVL we can see: VAR_COMMAND. structGenericModbusCommand %ML1002 commandType COMMANDTYPE %MB8016 ... %MB8020 I am not specifying a pointer or a reference it is a struct type, why is it mapping to a %MW location (random one). How can I control where it is mapping to? I need a consistent way to map STRUCT to specific modbus address. Is it possible? Thanks, Paulo Note I am using a Codesys OEM: Schneider Machine Expert Logic Builder (M241)
Last updated: 2024-08-13

Post by imdatatas on Auto Declare window disappears by itself in the Ladder editor ^{CODESYS Forge talk (Post)}
Hello Everyone, The "Auto Declare" window disappears by itself in the Ladder editor. For example, a new function block is wanted to be added to the Ladder editor. (For example; MC_Jog block and instance name will be fbMcJog). To do this, "Empty box with EN/ENO" is added to the ladder line from the Toolbox on the right and when you type MC_Jog in the empty box and press enter, normally the "Auto Declare" window appears and you are expected to be asked to write the instance name here. However, this "Auto Declare" window closes itself immediately, it does not wait for the user to enter a value or close the window. I often encounter this situation in many IDE versions. Does this seem like a bug? If anyone has encountered a similar problem while creating a new program name, function or function block instance name regarding the "Auto Declare" window and knows a solution, I would be glad if you could share it. Best wishes Imdat
Last updated: 2025-03-06

Post by jzhvymetal77 on VarAccGetAddress does not return the correct address for TYPE_ARRAY or TYPE_USERDEF. ^{CODESYS Forge talk (Post)}
VarAccGetAddress does not return the correct address for TYPE_ARRAY or TYPE_USERDEF. When you use VarAccGetNode, it returns a proper IBaseTreeNode if you provide the full path of an array element or structure element, and it even provides the correct data type. The problem is that with TYPE_ARRAY, it returns the start address of the array rather than the indexed element. With TYPE_USERDEF, it only returns the offset of the element instead of the actual address. This causes many issues with nested structures or arrays of structures, since it requires manually calculating the address based on the parent IBaseTreeNode. See attached image and example.
Last updated: 2025-08-28

Post by tokamk on Dynamic setting of the modbus tcp/ip slave ip address ^{CODESYS Forge talk (Post)}
Hello, I'm working on a project which includes Panel-PC which communicates with a PLC through Modbus TCP/IP. On the PLC I have a CODESYS code which has Modbus slave objects. The Modbus slave objects have to have manually set IP address in order for them to work properly and the Ip address has to be the PC-Panels's IP. This project is going to a customer and they're using their own IP address realm. So, my question is that is it possible to configure these slaves in some other way, so that the customer doesn't need to modify the CODESYS project? I was thinking that would it be possible to set the IP address of these slaves from external source?
Last updated: 2024-02-15

Post by hardcoder on EtherCAT Mailbox Gateway ^{CODESYS Forge talk (Post)}
Hi all I found that in the last Ethercat master release (4.8.0.0) the Mailbox Gateway feature has been added. This would be useful for me to connect to a specific slave in my system, since its configuration software supports this type of gateway communication. Anyway I don't find usage information or examples. At the moment I tried to enable it in the ethercat master device settings and I configured with an IP address on the subnet of the ethercat adapter (i.e. ethercat nic configured with static ip 192.168.10.100 subnet 255.255.255.0, mailbox gateway configured to 192.168.10.30). I expected it would have responded to ping commands on the address but nothing happens. I am missing something?
Last updated: 2024-12-11

Post by swol on HTML 5 - Controls -> Change Content-Security-Policy settings ^{CODESYS Forge talk (Post)}
Sorry for being late to the party... so it is not possible to use the webbrowser tool to display external websites in a visu anymore? As it is not possible to simply "adjust the ContentSecurityPolicyIncludeTrustedOrigins setting in the automatically generated webvisu.cfg.json file" as stated in the docs? We need to display data read from a Raspberry Pi (part of our computer network) in our webvisu. We used to do it by entering the Pi's IP address as the URL variable in the webbrowser element but now (I don't know since when, I'm new on the job) "The page’s settings blocked the loading of a resource (frame-src) at 'IP address' because it violates the following directive: “default-src 'self' 'unsafe-inline'”. What are the options for displaying the data?
Last updated: 2025-11-11

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 dnordenberg on BOOL variable in OPC UA and modbus simultaneously ^{CODESYS Forge talk (Post)}
How can I have an BOOL variable that is read/write in both modbus TCP server and from OPC UA at the same time? Variables with %MX.n %QX.n addressing which is used for BOOL/coils in modbus server is not allowed in OPC UA symbol list on Schneider M251 controllers. I have already asked on Schneiders forum but there are not a lot of codesys experts over there :( So OPC symbols can't have a address and the modbus TCP server needs a address. So how should I do it then? It seems like an impossible combination. Since I want read/write access from both ways I can't just simply make a second variable and assign it the value of another since it would be a one way assignment. I also tried using VAR_CONFIG which then makes the address syntax %Q or %M in my main variable list and that fools OPC UA Symbol Configuration to allow it and then I add the complete %MX.n address of it in the VAR_CONFIG list. This semi works, I can toggle the BOOL from modbus but the OPC UA symbol seems to be read only. It displays symbol status but nothing happens when I toogle it. I think I need another way to have the variables and symbols pointing to the same bits in memory... My plan B is to write a BOOL array compare FB that saves a history bit from previous cycle and if that does not match current status at next cycle for either the OPC symbol or the modbus variable then it copies the new status over to the other. Maybe ugly but it's like my last alternative. Kind regards David
Last updated: 2025-07-14

Change IO-Link Device Interface connected to a Profinet-Slave at Runtime ^{CODESYS Forge talk (Thread)}
Change IO-Link Device Interface connected to a Profinet-Slave at Runtime
Last updated: 2025-03-19

Package Download Error: The response ended prematurely, with at least 11522184 additional bytes expected. error ^{CODESYS Forge talk (Thread)}
Package Download Error: The response ended prematurely, with at least 11522184 additional bytes expected. error
Last updated: 2022-11-11

Changing the Cycle Interval of a Task at Runtime (PLC Running) ^{CODESYS Forge talk (Thread)}
Changing the Cycle Interval of a Task at Runtime (PLC Running)
Last updated: 2018-07-17

__NEW vs FB Factory for one-time creation of FB's at start-up ^{CODESYS Forge talk (Thread)}
__NEW vs FB Factory for one-time creation of FB's at start-up
Last updated: 2023-01-15

Going online from 2 different PC. (Not at the same time) ^{CODESYS Forge talk (Thread)}
Going online from 2 different PC. (Not at the same time)
Last updated: 2022-04-13

7 inputs and 8 outputs. only 3 outputs can be TRUE at once ^{CODESYS Forge talk (Thread)}
7 inputs and 8 outputs. only 3 outputs can be TRUE at once
Last updated: 2018-11-15

Installing V2.3 for Turck BL20 at same time as Bosch V12. ^{CODESYS Forge talk (Thread)}
Installing V2.3 for Turck BL20 at same time as Bosch V12.
Last updated: 2012-05-15

Reading value of whole struct variable at online mode by script ^{CODESYS Forge talk (Thread)}
Reading value of whole struct variable at online mode by script
Last updated: 2020-04-05

the version of at least one library has changed .. which ? ^{CODESYS Forge talk (Thread)}
the version of at least one library has changed .. which ?
Last updated: 2012-08-03

Does all programs in a task calls exactly at the same time ? ^{CODESYS Forge talk (Thread)}
Does all programs in a task calls exactly at the same time ?
Last updated: 2016-08-05

How to change visualization size, or initiate automatic detection at runtime? ^{CODESYS Forge talk (Thread)}
How to change visualization size, or initiate automatic detection at runtime?
Last updated: 2020-04-08

How to verify a CAN message is received at a specific rate. ^{CODESYS Forge talk (Thread)}
How to verify a CAN message is received at a specific rate.
Last updated: 2022-03-01

Going online from 2 different PC. (Not at the same time) ^{CODESYS Forge talk (Thread)}
Going online from 2 different PC. (Not at the same time)
Last updated: 2022-04-13

Periodic Collection of Value at Any Time From an Ever-Changing Value ^{CODESYS Forge talk (Thread)}
Periodic Collection of Value at Any Time From an Ever-Changing Value
Last updated: 2019-03-23

[Beaglebone Black] Run python scripts and CoDesys runtime at the same time to control GPIO ^{CODESYS Forge talk (Thread)}
[Beaglebone Black] Run python scripts and CoDesys runtime at the same time to control GPIO
Last updated: 2021-03-17

Going online from 2 different PC. (Not at the same time) ^{CODESYS Forge talk (Thread)}
Going online from 2 different PC. (Not at the same time)
Last updated: 2022-04-13

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