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Home Forum Configuring LinuxCNC ClassicLadder Modbus TCP vs RS-232/485 questions

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TOPIC: Modbus TCP vs RS-232/485 questions

Re:Modbus TCP vs RS-232/485 questions 19 Jul 2012 08:55 #22210

  • bigalex
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Maybe if you have a TCP/IP to RS485 gateway you can handle on the RS485 side different Modbus slaves (i.e. Schneider Electric TSXETG100) .

MODBUS TCP/IP (IP ADDRESS 192.168.1.50) ---> TSXETG100 ---> RS485 ---> MODBUS SLAVE #2 ---> MODBUS SLAVE #3 ---> MODBUS SLAVE #10

In this case you can communicate in Modbus TCP/IP 100Mbit till the gateway but the real speed is related to the slower side RS485.

:blink: bigalex
Last Edit: 19 Jul 2012 08:59 by bigalex.
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Re:Modbus TCP vs RS-232/485 questions 23 Jul 2012 10:14 #22349

  • VNR
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Maybe if you have a TCP/IP to RS485 gateway you can handle on the RS485 side different Modbus slaves (i.e. Schneider Electric TSXETG100) .
MODBUS TCP/IP (IP ADDRESS 192.168.1.50) ---> TSXETG100 ---> RS485 ---> MODBUS SLAVE #2 ---> MODBUS SLAVE #3 ---> MODBUS SLAVE #10
In this case you can communicate in Modbus TCP/IP 100Mbit till the gateway but the real speed is related to the slower side RS485.
Yes, the Remote I/O Delta RTU-EN01 have an aditional RS-485 port, and the manual says that i can use it as master and poll some Rs-485 slave devices and map the response to internal registers. I will try it next week.
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