Post by marekxc on Little endian to Float from Modbus RTU ^{CODESYS Forge talk (Post)}
Maybe try going back to step one and: Var Reg1: WORD; Reg2: WORD; Reg12: DWORD; Value: REAL; end_var // program Reg1:= 4096; Reg2:= 14884; Reg12:= (reg2 * 65536) + reg1; Value:= DWORD_TO_REAL(Reg12);
Last updated: 2023-12-28

Post by forest on SM Drive license error ^{CODESYS Forge talk (Post)}
Hi, when it comes about license, I used INVTmatic Studio, which uses Codesys, for programming INVT plc. I bought Codesys Modbus license, it was not expensive, and then realised that INVT didn't have License Manager option (greyed out in program) which is needed for using of Codesys License. I contacted support from INVT, but developers told me that option is still not available. So depending on environment for programming Codesys, you can or not use Modbus license. Good thing about this version of Modbus TCP it works both direction. I could send commands and receive feedbacks from drive. But communication stops after 30 mins. So I used simple version of ethernet modbus which is somewhere in INVT or Condesys library (I can check tomorrow) which works only one way. I could send cmd to drive, and control it, but didn't have any feedback, like some readings back in PLC. which is bad, but at least I could start it and it didn't fail after 30 mins.
Last updated: 2024-01-10

Post by mozburg on v3.5 SP19 - Modbus TCP Devices - Channel Limit? ^{CODESYS Forge talk (Post)}
Has there been any progress on this issue? Currently running sp19 patch 5 with all packages updated but unable to add more channels...
Last updated: 2024-01-18

Post by dim54 on MBChannel ^{CODESYS Forge talk (Post)}
Hello! I am interested in the Modbus Slave channel parameter uiReadLength to use in the ST-program (see picture). How to read the value of uiReadLength in a ST-program? Only Edwin the Great and Terrible can answer this question.
Last updated: 2024-01-22

Post by irshad on Modbus TCP/IP slave communication errow ^{CODESYS Forge talk (Post)}
While reading the value of a slave device, it shows error frequently and i need to restart my PLC for getting the communication back. In codesys it shows the slave in Red color with error status. How to solve the above
Last updated: 2024-02-03

Post by nano on Dynamic setting of the modbus tcp/ip slave ip address ^{CODESYS Forge talk (Post)}
habe a look to this faq, this should work for u https://faq.codesys.com/plugins/servlet/mobile?contentId=24510471#content/view/24510471
Last updated: 2024-02-17

Post by timvh on Timeout Error in Modbus Communication with WAGO PFC200 and iEM2050 Meter using 750-652 Module ^{CODESYS Forge talk (Post)}
I'm not sure, but maybe you have to configure the 750-652 first with the WAGO-IO-CHECK software to set it in RS485 mode?
Last updated: 2024-02-27

Post by ph0010421 on Sending Sequential Modbus TCP Packets ^{CODESYS Forge talk (Post)}
Hello You'll need to write a proper sequence to send, then wait for confirmation, and then move on to the next step. Use the CASE statement in ST. It's perfect for creating a sequence.
Last updated: 2024-03-08

Post by dawidr on Timeout Error in Modbus Communication with WAGO PFC200 and iEM2050 Meter using 750-652 Module ^{CODESYS Forge talk (Post)}
Did you manage to solve the problem with time out? I got the same issue and I've no idea what I'm doing wrong.
Last updated: 2024-04-07

Post by dawidr on Timeout Error in Modbus Communication with WAGO PFC200 and iEM2050 Meter using 750-652 Module ^{CODESYS Forge talk (Post)}
Did you manage to solve the problem with time out? I got the same issue and I've no idea what I'm doing wrong.
Last updated: 2024-04-07

Post by vincentger on v3.5 SP19 - Modbus TCP Devices - Channel Limit? ^{CODESYS Forge talk (Post)}
Any resolution on this? I have currently 75 channels in my project that i brought up from SP18, which means i am 65 Channels above the new limitation?
Last updated: 2024-04-09

Post by marcolim on Slow modbus digital input response ^{CODESYS Forge talk (Post)}
Hi francoinf, I've the similar problem and similar configuration. I did with an Arduino Board loaded by a ModbusRTUServer application on it. What I've notice is the slowly acquisition when release the digital signal (e.g. pin2) when it gets off. Anyone have suggestion?! Thanks
Last updated: 2024-04-13

Post by marcolim on Slow modbus digital input response ^{CODESYS Forge talk (Post)}
[Update]. My issue's solved, I applied the resistors in Pull-down configuration on each digital input. In thus configuration never happened "floating or delaying" acquisition on SoftPLC/Arduino Board.
Last updated: 2024-04-15

Post by timvh on IoDrvModbusTCP_Diag not defined when using MODBUS ^{CODESYS Forge talk (Post)}
Most likely related to the Device Diagnostics functionality. Double click on your device (PLC), go to the tab "PLC settings". Enable the advanced option "Enable diagnosis for devices". Build your application again.
Last updated: 2024-04-15

Post by mbmik on IoDrvModbusTCP_Diag not defined when using MODBUS ^{CODESYS Forge talk (Post)}
Thanks alot for your time and help! I quickly tested the suggestion, as it makes a lot of sense. Unfortunately the erros still appear as before. The settings was already set before, and i tried turning it off.. no effect..
Last updated: 2024-04-16

Post by hyet on IoDrvModbusTCP_Diag not defined when using MODBUS ^{CODESYS Forge talk (Post)}
Currently seeing the same issue here, with a project moved from 3.5.19. Diving into it too to see if i can find the cause
Last updated: 2024-05-01

Post by guilhermeleao on How to communicate 2 pcs that are using CODESYS ^{CODESYS Forge talk (Post)}
I need to connect 2 computers on the same network that are running codesys, so that they can receive and change variable values from each other. This connection must preferably be made using Modbus.
Last updated: 2024-05-06

Post by zer0g on Modbus Client Request Not Processed ^{CODESYS Forge talk (Post)}
Hi, I have the same problem as the guys above. Any solution or hint in the right direction is appreciated. Codesys version 3.5.19.2, Lib version: 4.4.0.0. Thank you!
Last updated: 2024-05-29

Post by hwopereis on How to use Application Trigger in Modbus TCP Server ^{CODESYS Forge talk (Post)}
I'm now circumventing the problem by creating a separate TCP client for all Write actions. Upon registering a changed variable, I enable this client, until the change is processed.
Last updated: 2024-07-01

Post by dantheman on Connecting to SoftPLC Only Works By Turning Off Modbus Ethernet Port ^{CODESYS Forge talk (Post)}
It's all good btw, learned that the runtime doesn't isolate the networks that are involved so changing the ethernet subnets away from the Wi-Fi's subnet was all I needed (maybe some config file changes helped, can't say for certain)
Last updated: 2024-08-08

Post by esmith on OPTO22 Groov Epic PR2 Modbus Comms Dropping out every 2 hours and 4 Mins ^{CODESYS Forge talk (Post)}
I think I am having a similar issue. Have you found out what was causing this problem?
Last updated: 2024-09-10

Post by i-campbell on MODBUS TCP REGISTERS CODESYS V3.5 ^{CODESYS Forge talk (Post)}
codesys is in hex and starts at 0 your other program is set to decimal and maybe starts at 0 or 1, I can't tell.
Last updated: 2024-10-12

Post by hanpekel on Reading request counter value from modbus server in application ^{CODESYS Forge talk (Post)}
Any way I can read the value of the 'request counter' (see screenshot) in my application. Amount of client connections is easily found using ModbusTCP_Slave_Device.uiClientConnections; But for request counter it does not seem to be that simple.
Last updated: 2024-10-16

Post by banialuk on Modbus TCP Server ^{CODESYS Forge talk (Post)}
Hello, I have poroblem with define input in function block modbusFB.serverTCP 'dataModel', in my aplication I need starting Input Registers from 3000, and I must define this in 'data Model' but I dont now how exacly to do it. Anybody now somethin about this?
Last updated: 2024-10-19

Post by winki on Modbus TCP & RTU with Control for Linux SL ^{CODESYS Forge talk (Post)}
I do not have error anymore using nic with eth0 value. But my network it still 172.17.0.3 like the first picture.
Last updated: 2024-10-23

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