Modbus poll vs temco modbus poll for external devices

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  • I used software to simulate third-party devices
    N-8-2 and Baudrate is19200 ， I connect this devices to T3BB’s RS485 sub port .

I set Both T3BB’s RS485 Subport and Main port to Modbus Master . The result’s is Got timeout error .

If Only set the RS485 subport to Modbus

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Master , to read the third-part device data it is OK. ( * Modbus data is forwarded to third-party devices through the T3BB network)

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So, if you want to use third-party devices (via modbus) and connect to Temco devices, you just have to configure one of the RS485 ports and just line up Unused ports (because third-party devices don’t complete part of the command line that supports Temco).