RS232 to RS485 converter

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  • August 11, 2021 at 11:04 am #9391
    MilanJo
    Participant

    I use RS232 to RS485 converter with MAX232 and SN75176 chips. I want to use RTS signal for data enable on SN75176 chip.
    How do I set the RTS signal to be active only when sending data, for serial communication – modbus RTU over RS485?
    When I select the RTS option in “Serial Port Properties” – RTS pin on serial port is always active.
    thanks for help

    August 11, 2021 at 3:56 pm #9398
    Mikhail
    Moderator

    This feature requires changes in the source code of the serial communication channel. In Rapid SCADA 6, which is not ready yet, it will be possible to develop a custom communication channel with the needed logic. However, may be it’s easier to change the converter.

    August 12, 2021 at 9:08 am #9399
    MilanJo
    Participant

    Thank you for your prompt response. We are looking forward to the new version of SCADA.

    • This reply was modified 2 years, 8 months ago by MilanJo.
    August 12, 2021 at 2:44 pm #9402
    Mikhail
    Moderator

    Will you develop a custom communication channel by yourself or prefer ordering the development?

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