Hi Joca,

usually the devices have input and output registers, where the input registers are used for commands and settings. Maybe you can share the datasheet of your device?

Nicolai

Hi Gianni, could you please share the image version of your RevPi and the version of the installed revpi nodes? Also the kernel logfile (/var/log/kern.log or dmesg) and revpi node logfile could be helpful in order to find the root cause of the delay. Do you use any other software on the RevPi which ...

Hi Joca, just to clarify if I understood your project requirements correct: You want to collect data from 4 modbus TCP slaves and export the collected data to your SCADA system via Modbus? The first part can be done by configuring an individual modbus TCP master for each slave (https://revolutionpi....

Hallo Tuscan, bevor du das Image per USB auf den RevPi flashen kannst, musst du diesen wie in der Anleitung beschrieben, mit Hilfe von rpiboot in den Massenspeichermodus versetzen. IMPORTANT: Make sure that you have backed up your CODESYS license before you flash a new image to your device! See here...

Hello WANG,

do you mean the register address in the extended data dialog? The address format is decimal.

BR Nicolai

Hello LEOMENA, as you already pointed out the problem is very likely the fact, that your program needs the graphical environment. The revpipyload is designed to run your program in background as a system service which is completly decoupled from the session which is started by the graphical environm...

Hi garysn, there is no Delphi library as far as I know, but you can probably access the process image directly via /dev/piControl. For some examples have a look into the article about using with C: https://revolutionpi.com/picontrol/?noredirect=en_US Using ioctl with lazarus: https://www.freepascal....

Hi jce, I remember a similar experience with devices running older image as you do. Please update to our latest image (buster) as your release has already two successor releases (stretch and since a few months buster). You can find the instructions in our tutorial section: https://revolutionpi.com/t...

Hi Joca, please have a look at our tutorials regarding the configuration of our (virtual) Modbus modules: https://revolutionpi.com/tutorials/modbus/?noredirect=en_US. For Modbus RTU you will need either a RevPi Connect with an integrated RS485 interface or a Core3 with an external USB to RS485 adapt...

Hi, please remove any register configuration and restart the modbus driver / reset the action. Is it still != 0? Regarding the raw address: I have a Modbus RTU meter connected to my RevPi and having the same issue that the register address is specified with 30007, but I have to use 7 in order to get...