Post by ernesto881124 on ernesto881124 ^{CODESYS Forge talk (Post)}
Hello good morning everyone I would like to ask a question, is it possible to directly connect a device that only contains modbus RTU communication through an R-45 connector, directly to the PC? Or would you need an intermediate device to achieve communication? It would be of great help to me because I cannot achieve communication between the Codesys simulator plc and a Fuji Frenic mini VFD, please help me if anyone has had the same experience. Thank you so much
Last updated: 2023-09-13

Post by jeffgamsby on Accessing ModbusTCP addresses from python ^{CODESYS Forge talk (Post)}
Hi, I am new to modbusTCP and I am trying to access Input registers from codesys (3.5.SP13). The offset is 16#0000 and I am trying to access Channel 1[24] %IW24 to pull analog values. I am using pyModbusTCP and I need to supply a modbus address and the number of registers to read. What does 16#0000 mean in terms of the actual offset, how do I translate this number plus the channel to access this info via python? Any help would be appreciated, thank you.
Last updated: 2023-09-20

Post by kislov on Change modbus server parameters from program ^{CODESYS Forge talk (Post)}
Use in IEC-code: Modbus_Serial_Device.UpdateComPortSettings(...) https://content.helpme-codesys.com/en/libs/IoDrvModbusSerialSlave/Current/pou-ModbusSerialDeviceDiag/UpdateComPortSettings.html Take note: "Only possible if server is disabled (see xEnable Input)" So: Modbus_Serial_Device.xEnable := FALSE; Modbus_Serial_Device.UpdateComPortSettings(...) Modbus_Serial_Device.xEnable := TRUE; Please note that after PLC reboot the values from the GUI (from your screenshot) will be applied again. So you need to save values from HMI in RETAIN and restore them after start of application.
Last updated: 2024-07-17

Post by naps on Welchen I-Port benötige ich? ^{CODESYS Forge talk (Post)}
Hallo, ich versuche eine 750-653(konfiguriert per iocheck) über die Wago Modbus Lib einzusetzen. Ich scheitere im moment an dem Korrekten I-Port. Ich habe es mit 75x_653 und IoConfig_Globals.75x653 versucht, jedoch bekomme ich folgenden fehler: ------ Übersetzungslauf gestartet: Applikation: Device.Application ------- Code typisieren... Code erzeugen... [FEHLER] Unbenannt7: POU_1 Device: SPS-Logik: Application: C0032: Typ 'DED.CAADiagDeviceDefault(caa device diagnosis, 3.5.20.0 (caa technical workgroup))' kann nicht in Typ 'WagoTypesCom.I_WagoSysComBase(wagotypescom, 1.6.2.3 (wago))' konvertiert werden Übersetzung abgeschlossen -- 1 Fehler, 0 Warnungen : Kein Download möglich Wie kann ich den die Karte benutzen?
Last updated: 2024-10-01

Post by garrian on How to write multiple coils (Modbus FC15) ^{CODESYS Forge talk (Post)}
Thanks for your reply. I belive it is contiguous, I'm writing to adress 0 to 4. Or, do you mean something else? Well, something is happening. If I on the client set adress 1,2,3 to true, only 1 is set to true on the server side. On the client side, the data is array of word. But on the server side, the coils are array of bool. Holding register is array of word on server side. Can this be a problem? Attached screenshot of how it looks at the server side.
Last updated: 2024-11-17

Post by garrian on How to write multiple coils (Modbus FC15) ^{CODESYS Forge talk (Post)}
Thanks! As far as I can see, the client can only send words. And on the server side there are an array for each of the functions: bool for coil and discrete, word for holding and input registers. I assume I can use holding register, then use bit mapping on the words instead of coils. But I really want to use the FC15/coils.
Last updated: 2024-11-17

Post by tim2508 on Werte von NodeRed an Codesys für Raspberry ^{CODESYS Forge talk (Post)}
Guten Abend liebe Community, Im Rahmen meiner Technikerarbeit muss ich ein Gewächshaus mit einem RaspberryPi und Codesys erstellen. Mein Problem liegt hierbei bei den Sensoren. Ich bekomme über NodeRed alle Sensor Signale ausgelesen jedoch bekomme ich sie nicht im Codesys übertragen. Hat hier jemand evtl. eine Idee ? wenn ja am besten mit Codebeispiel. Habe generell an Modbus oder MQTT gedacht. Vielen Dank im Vorraus Tim
Last updated: 2025-02-19

Post by ivan-g on MODBUS ^{CODESYS Forge talk (Post)}
Hi There, I took over a project from a colleague (in GTB) who left the company. When I took over his project, it wouldn't compile because some libraries were missing. I managed to recover quite a few libraries, but I can't find the library that contains the block functions shown in the image. Here are a few examples: Fb_RegMel_ISO Fb_DefModbus FbDecalConsSalSO Fb_Autor_FreeCool_CTA_C I'm a little stuck at the moment, so if you see a Facebook post that speaks to you, don't hesitate to get in touch! Thank you in advance for your help.
Last updated: 2025-08-05

Post by ivan-g on MODBUS ^{CODESYS Forge talk (Post)}
Hi There, I took over a project from a colleague (in GTB) who left the company. When I took over his project, it wouldn't compile because some libraries were missing. I managed to recover quite a few libraries, but I can't find the library that contains the block functions shown in the image. Here are a few examples: Fb_RegMel_ISO Fb_DefModbus FbDecalConsSalSO Fb_Autor_FreeCool_CTA_C I'm a little stuck at the moment, so if you see a FB that speaks to you, don't hesitate to get in touch! Thank you in advance for your help.
Last updated: 2025-08-05

Post by camjam on BOOL variable in OPC UA and modbus simultaneously ^{CODESYS Forge talk (Post)}
I have come across this. The only way i could get it to work would be to define a word that is also the same address as the Bools. eg %MX600.0 through to %MX600.15 would be individually defined in the variables and them have another variable word defined at %MW300. You still need to break out the word in what ever program you are using to read/write the OPCUA tags.
Last updated: 2025-08-18

Post by wind-11 on Simulation Modubus ^{CODESYS Forge talk (Post)}
Hallo zusammen, ich bin über die Arbeit auf ein Problem in der Simulation gestoßen. In einem Test-Projekt haben wir eine Modbus Verbindung aufgebaut. Dies wollten wir mit Test-Werten simulieren. Verbindung hat auch funktioniert, jedoch sind leider die Werte eingfrohren und melden keine "laufenden Daten". (Bild im Anhang) Da es meine ersten Berührungspunkte mit Codesys sind und mein Kollege an anderer Stelle weiter arbeitet, hatte ich gehofft, dass vielleicht hier jemand eine Idee hat. MfG und schon jetzt ein Danke vorweg.
Last updated: 2024-03-22

Post by ph0010421 on General question about library versions ^{CODESYS Forge talk (Post)}
Hello I can't find anything to read on the subject so I'll ask here. Up to now, when adding a (for example) Modbus Master, I've selected the version <= the RT version, so if I'm using SP13 Patch 3, I can use a library that doesn't exceed this. I've no idea if this is correct, but it's always worked. Can someone explain the 4.x.x.x libraries that have appeared; are they tied to a RT version? The controller I use is now at SP18Patch60, so should I continue to use 3.5.xxx or change? thanks
Last updated: 2024-05-29

Post by mubeta on Some 'pathetic' errors in SoftMotion program ^{CODESYS Forge talk (Post)}
Hello everyone, I have a very simple program for the process, but it's driving me crazy and I can't see the problems I'm left with: Short topological description: Dual Core Berghof controller with softmotion runtime version 3.5.19.30; Two axes with servodrive on canopen bus, clocked distributed from master; Ethercat I/O node; 2 ms ethercat task, 2 ms canopen bus cycle time; I/O objects of the canopen master and canopen drives connected to the ethercat task cycle; Problem 1: Two separate programs each manage their own axis and drive, with separate state machines. A first axis moves primarily in velocity, except having to position itself absolutely at a predetermined point at the end of the job; the second axis, on the other hand, is a paper unwinder that changes, for each job cycle, from actions in absolute, relative, and cam displacement with the master axis. Well, the state machine of both axes was written in such a way as to call running the useful FB and change it on state change in this way: CASE i_stateMachine OF 0: o_Power(Enable := TRUE, bRegulatorOn := FALSE, bDriveStart := FALSE, Axis := o_PaperUnwinderAxis); o_MoveAbs(Execute := FALSE, Axis := o_PaperUnwinderAxis); o_MoveRel(Execute := FALSE, Axis := o_PaperUnwinderAxis); o_CamSelect(Execute := FALSE, Master := o_MachineAxis, Slave := o_PaperUnwinderAxis, CamTable := cam_PaperUnwinder); o_CamIn(Execute := FALSE, Master := MachineEncoder, Slave := o_PaperUnwinderAxis); o_CamOut(Execute := FALSE, Slave := o_PaperUnwinderAxis); o_SetPosition(Execute := FALSE, Axis := o_PaperUnwinderAxis); IF ... THEN i_StateMachine := 10; END_IF; 10: o_Power( Enable := TRUE, bRegulatorOn := TRUE, bDriveStart := TRUE, Axis := o_PaperUnwinderAxis ); IF o_Power.Status THEN i_StateMachine := 20; END_IF; 20: (* Avanzamento carta *) o_MoveAbs( Execute := TRUE, Position := o_Somewhere, Velocity := 25.0, Acceleration := 3666.7, Deceleration := 3666.7, Jerk := 48000.0, Direction := MC_DIRECTION.positive, Axis := o_PaperUnwinderAxis ); IF o_MoveAbs.Done THEN o_MoveAbs(Execute := FALSE, Axis := o_PaperUnwinderAxis); i_StateMachine := 30; END_IF 30: d_HomingPosition := ...; o_SetPosition( Execute := TRUE, Position := d_HomingPosition, Mode := FALSE, Axis := o_PaperUnwinderAxis ); (* ... *) IF o_SetPosition.Done = TRUE THEN o_SetPosition(Execute := FALSE, Axis := o_PaperUnwinderAxis ); o_LogServer.Append(sMessage := '...', lscClass := LOGSERVER_CLASS.ALWAYS, sdt := o_CommonsMgrData.systime.sdtLocal); i_StateMachine := 40; END_IF; 50: ... The code above is a sketchy example of what I wanted to write. But it gives me a spot problem: in some, the state change results in a drive error, which is unrecoverable except with a reinitialization via SM3_ReinitDrive(). Things are improved a little if in the program I always run the call of all softmotion blocks in this way: o_Power(Axis := o_PaperUnwinderAxis); o_Jog(Axis := o_PaperUnwinderAxis); o_Halt(Axis := o_PaperUnwinderAxis); o_MoveAbs(Axis := o_PaperUnwinderAxis); o_MoveRel(Axis := o_PaperUnwinderAxis); o_CamIn(Master := MachineEncoder, Slave := o_PaperUnwinderAxis); o_CamOut(Slave := o_PaperUnwinderAxis); If I don't execute all the calls of all the motion FBs used, when exchanging machine state often (but not always), the axis goes into error with event id THE_FB_WASNT_CALL... Done a little diagnostics it seems that the FBs return the bDone, before they are completely terminated. I tried doing the machine state exchange not with the bDone bit of the FBs, but with the 'standstill' state of the axis. It didn't seem to change anything. Problem 2: During the use SM3_ReinitDrive() I get the erro in the log: "NetID 0: SDO read error for object 16#607C..." Assuming that the device involved it's one of the two servodrive, (no others device are present in the network), I don't found any object 0x607C in the 'possible object list in/out' of the two drive, and I don't understand where this object can be listed. So any ideas and suggestions regarding these two issues will be very, very welcome. If you need the source project, I am willing to send it.
Last updated: 2024-07-17

Post by kurtk on dynamic modbus devices ^{CODESYS Forge talk (Post)}
I am CODESYS neophyte getting my wheels on. My goal is to re-platform an existing PLC application written in 61131 ST I've got the majority of the code/variables in a compilable form - excluding all the IO and comms nuances I am not sure whether this the right forum An important functionality which I implemented on the other platform was totally dynamic modbus devices... Most configurations I have come across impose static MB configs in which all configured devices MUST be present and functional... I have monkeyed around with MB enough to know that herding a half dozen MB cats into a working config can be tricky. I just do them one at a time and dynamically turn them on/off in whatever combination is convenient with ID, IP, baud, parity etc being runtime tweakable. I am totally curious whether this is possible with codesys, or whether its device configuration corrals one into a static cage which requires re-building the code to support flexible variations. Best regards
Last updated: 2025-08-19

Post by kurtk on runtime dynamic modbus devices ^{CODESYS Forge talk (Post)}
I am CODESYS neophyte getting my wheels on. My goal is to re-platform an existing PLC application written in 61131 ST I've got the majority of the code/variables in a compilable form - excluding all the IO and comms nuances I am not sure whether this the right forum An important functionality which I implemented on the other platform was totally dynamic modbus devices... Most configurations I have come across impose static MB configs in which all configured devices MUST be present and functional... I have monkeyed around with MB enough to know that herding a half dozen MB cats into a working config can be tricky. I just do them one at a time and dynamically turn them on/off in whatever combination is convenient with ID, IP, baud, parity etc being runtime tweakable. I am totally curious whether this is possible with codesys, or whether its device configuration corrals one into a static cage which requires re-building the code to support flexible variations. Best regards
Last updated: 2025-08-19

Post by acc00 on Main Task cycle too long leading to PLC Fail ^{CODESYS Forge talk (Post)}
I have 2 Wago PFC200 PLC, running with Runtime SP19 Patch 5, with the Redundant application. The PLC communicates as Modbus Master with at this moment 15 Modbus Slaves -later there will be 28 in total- (Drives, Power management units,...). These devices are connected in 2 rings (1 ring of Drives, 1 ring of Power Management units), with 2 Managed Moxa Switches being part of the ring. Each PLC is connected to one of these switches. The issue I'm encountering is that the Cycle time of the Active PLC goes very high when I'm closing the Drive ring (simulating an issue on one Cabinet supply, resulting in that one Drive shut down, which can happen on field quite often). As a result of this long cycle, the PLC fails and goes to Exception, and the Passive PLC does not take control of the system. A normal cycle is around 30ms for the Main task, and a few ms for the Ethercat task. When I monitor with Profiler, I see that in this Maximum Cycle, the main Task is only taking 13ms, so I'm not sure where the PLC is hanging for so long. Is the remaining cycle time the Redundant management/sync or something else? Thank you in advance.
Last updated: 2024-03-08

Post by paro on Modbus Client Request Not Processed ^{CODESYS Forge talk (Post)}
Hi, Problem in your code is that you are not calling the ClientFb cyclic. Please look at the Example from CODESYS: https://forge.codesys.com/prj/codesys-example/modbus/home/Home/ Your code works if the client fb is called cyclic! IF NOT initDone THEN initDone := TRUE; // configure clientTcp clientTcp(aIPaddr:=Ethernet.IPAddress, uiPort:=502); // configure clientSerial clientSerial(iPort:=SysCom.SYS_COMPORT2, dwBaudRate:=SysCom.SYS_BR_115200, byDataBits:=8, eParity:=SysCom.SYS_EVENPARITY, eStopBits:=SysCom.SYS_ONESTOPBIT, eRtuAscii:=ModbusFB.RtuAscii.RTU); // configure clientRequestReadCoils_1 clientRequestReadCoils_1(rClient:=clientTcp, uiUnitId:=42, udiTimeout:=TO_UDINT(T#10MS)); // configure clientRequestWriteSingleRegister clientRequestWriteSingleRegister(rClient:=clientTcp, uiUnitId:=43, udiTimeout:=TO_UDINT(T#10MS)); // configure clientRequestReadCoils_2 clientRequestReadCoils_2(rClient:=clientTcp, uiUnitId:=44, udiTimeout:=TO_UDINT(T#10MS)); // configure clientRequestReadInputRegisters clientRequestReadInputRegisters(rClient:=clientTcp, uiUnitId:=44, udiTimeout:=TO_UDINT(T#10MS)); END_IF // call the client FB's clientTcp(); clientSerial(); // call client request FB's clientRequestReadCoils_1(rClient:=clientTcp, xExecute:=TRUE, uiStartItem:=2, uiQuantity:=3, pData:=ADR(aDataCoils_1[0])); // for more details see Example_TCP, especially ClientRequest control (xExecute, xDone, xError). IF clientRequestReadCoils_1.xDone THEN // get data from aDataCoils_1 ... END_IF clientRequestWriteSingleRegister(rClient:=clientTcp, xExecute:=TRUE, uiItem:=3, uiValue:=123); clientRequestReadCoils_2(rClient:=clientTcp, xExecute:=TRUE, uiStartItem:=2, uiQuantity:=3, pData:=ADR(aDataCoils_2[0])); clientRequestReadInputRegisters(rClient:=clientTcp, xExecute:=TRUE, uiStartItem:=16, uiQuantity:=3, pData:=ADR(aDataInputRegisters[0]));
Last updated: 2024-05-29

Post by mikek10 on HTTP Client TCP Init Error ^{CODESYS Forge talk (Post)}
Hi, I tried posting in the discussion for the HTTP Client example but perhaps that is not monitored? I have been using http client successfully for approximately 12 months, however in recent weeks I have begun to get TCP_INIT_ERROR when attempting to communicate. The only resolution seems to be power cycling and then the connection begins to work again for a time. I am not aware of any changes to code or libraries between working ok and now. Cold reset does not resolve, only power cycle. It seems the error from NBS.TCP_Client is 6002 which I think is invalid_addr However the address is the same when working and not working?
Last updated: 2024-07-04

Post by sigurdrb on Codesys and error messages, warnings exceptions etc. ^{CODESYS Forge talk (Post)}
Hi, I tried some different libraries (CmpApp etc.) to find some global variables that I could read out as a variable in the codesys environment. Do any one of you know which libraries are best suited for this, and how I can read it out? My goal is to send messages, warnings etc. to the system that communicates to the PLC. Currently if something goes wrong I need to see the logfiles, or go online with the controller. I think I could save a lot of time if I could read the errors from our user interface that is connected to the PLC by TCP/IP.
Last updated: 2024-11-06

Post by matt-purcell on Which Lib to use, connect to a socket with URL instead of IP address ^{CODESYS Forge talk (Post)}
Hello, I have a new project and I need to connect to a TCP socket using the URL instead of an explicit IP address, myendpoint@mydomain.com Which library is best suited for this? This is for a new enterprise project, the endpoint is a server in a datacenter running some real time application. We have big IP, it will automatically reassign the IP address to the backup server if a crash occurs so an explicit IP won't work for me. I've done this in RS logix, working now to migrate that code over to codesys. Thanks in advance!
Last updated: 2024-06-17

Post by muhq on Profinet connection to Siemens CP343-1 Lean (IO-Device/Slave) ^{CODESYS Forge talk (Post)}
Hi, I am quite new to Codesys and I try to do a Profinet connection to an Siemens PLC (315-2DP) with CP343-1 Lean Modul. I already configured the Siemens PLC, exported the GSDML. Then I added a new project in Codesys, added following moduls: - Ethernet - PN_Controller - Imported Profinet Device via GSDML importer When I start the programm everything looks fine but I always get the message "Stopped Profinet" and no data is available This is only for a small test. Therefore I start to do that on a Windows 10 with Development System. Later I will try to realize this on Raspberry. Ethernet Adapter is configured (192.168.1.1 / 24) Firewall deactivated WinPCap is installed S7-Station seems to be found ('fuadazenzitest') Can please somebody help me?
Last updated: 2023-08-26

Post by seppi on Establishing communication between a Raspberry Pi 4 and an Arduino UNO R3 using I²C. ^{CODESYS Forge talk (Post)}
Hello everyone, I want to establish communication between my Arduino and my Raspberry Pi via I²C, but I have no idea how to make it work. However, it should work because there are many examples available, although none of them were programmed using Codesys, but rather using Python. My Raspberry Pi will be the master and is supposed to exchange measurement data such as speed and battery capacity with the slave (Arduino). I would be very grateful if someone could help me with my problem. Here is another link that could be helpful. However, I can't find the mentioned libraries
Last updated: 2023-12-03

Post by seppi on Raspberry 4 I²C with Arduino UNO R3 ^{CODESYS Forge talk (Post)}
Hallo zusammen Ich möchte meinen Arduino und meinen PI miteinander kommunizieren lassen via I²C doch ich habe keine Ahnung wie das funktionieren soll. Aber es müsste funktionieren da es viele Beispiele dazu gibt jedoch wurde keines der Beispiele mit Codesys programmiert sondern über Python. Mein PI wird der Master sein und soll mit dem Slave (Arduino) Messdaten wie Geschwindigkeit und Akkukapazität und so weiter austauschen. Wenn mir bei meinen Problem jemand weiterhelfen könnte währe ich sehr Dankbar. Hier noch ein Link der Hilfreich sein könnte. Ich finde aber die angegeben Bibliotheken nicht. https://forge.codesys.com/forum/en/773/genmed-documentation.pdf
Last updated: 2023-12-03

Post by alez on CANopen safety , SRDO error behavior ^{CODESYS Forge talk (Post)}
I have a project in which there is a Safety device in CANopen, and the PLC interfaces with it as Master. I would like to understand if it is possible to set the behavior in case one of the SRDOs that I receive from the slave is no longer received. From what I have seen, if the SRDOs are not received, the CANopen safety status becomes "Not in progress" and the mapped variables freeze at the last value detected. I want to understand if it was possible to set the variables connected to the SRDOs to take a default value (e.g. zero) in the event of a CANOpen error during reception.
Last updated: 2024-07-15

Post by siscu on Raspberry i2c master device ^{CODESYS Forge talk (Post)}
I want to implement an extended I2C master for Raspberry Pi Control. I was hoping for it to be as easy as creating a library with a FB that extends i2cMaster and associating it with a device following the forge drivers documentation, but I haven't managed to make it work as the driver behaves only as an i2c slave. I'm thinking this is because the forge forum only talks about extending i2c, and the master portion is omitted since most users won't want to add a custom one. I'd like to know if I'm doing something wrong. Is it really possible to make an I2C master extension device? If so, are there public examples we can check out? Any info on this topic will be appreciated.
Last updated: 2024-10-16

Sort by relevance or date