iX Talk

Posted: **Tue Sep 30, 2014 9:10 pm**

Dear Officer.

Thank you for your time for the message.

I am green hand for PLC and HMI Programing.

the following picture show my setting for PLC and HMI

However, My HMI still can not connect to my PLC with COM1(RS232 to RS485).

Please help me where I need change so I can fix it.

Thank you very much

Best Regards

Mei Yixin

Posted: **Wed Jan 22, 2020 12:26 pm**

Hi EndlessSoySouce,
One piece of this puzzle is missing. What is the pin out for your PLC and is a null modem or straight serial cable being used?

Also, the mention of the RS232 to RS485 is odd COM1 on the T7A can only be 232.

Often when we encounter cases such as this it is due to a cabling/configuration issue.

The use of Telegram on the RTS control could also be an issue and forcing a login is not supported i would look into these settings.

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