I found the reason.
In Pictory, I reconfig the RevPi connect, MIO, and DIO. I can connect them succefully. But I can not communication with my devices (Flow meter) via RS485.
Then I open /etc/CODESYSControl.cfg and Add

[SysCom]
Linux.Devicefile=/dev/ttyUSB

MIO and DIO did not work, and the ...

Hello Yongchaow,

please have a look the Codesys checklist .
What do you means with "serial coms". Do you get an error message when you try to connect to the unit?

Best Regards

Ulrich Kouatang Biakoup | Technical Support


Hi, Ulrich
I have finish the checklist,
1. RevolutionPiBridgeV1.2.1.0 ...

Hello Yongchaow,

please have a look the Codesys checklist .
What do you means with "serial coms". Do you get an error message when you try to connect to the unit?

Best Regards

Ulrich Kouatang Biakoup | Technical Support


I found a reason but not all. I solved the serial communication problem ...

Hello Yongchaow,

please have a look the Codesys checklist .
What do you means with "serial coms". Do you get an error message when you try to connect to the unit?

Best Regards

Ulrich Kouatang Biakoup | Technical Support


I have check the checklist:
1. CODESYS Control for Raspberry Pi MC SL ...

Several days ago, I can connect to my devices via serial coms successfully. But I do not know what I changed, and there are several problems. I can not connect to my devices via serial coms, and I can not read data from IOs of MIO and DIO.

2023-03-23 224239.png

Then I piTest via SSH and found ...

Several days ago, I could not connect my RevPi via CODESYS but website worked well. So I installed a new image and reinstall the CODESYS to fix it. Now I can connect the machine but I can not restore the license. I did all thing step by step based on the manual on the website. But there is the ...

When I wanted to test my MIO, I found there were no MIO in the Pictory 1.4.2. So I upgrade the Pictory. But it can just upgrade to 1.4.7. I do not know what's wrong with it. When I type "sodu apt-get update", all the souces are InRelease.