WEG RS485-ETH-N, User Manual, Page: 20 / 32

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20 | Ethernet / Serial Gateway - RS485-ETH-N
Serial communication parameters of the serial device in slave status are as follows:
Baud Rate 57600
Stop Bit 1
Parity None
Tabela 3.4: Server Mode Serial Communication Settings
1. MODBUS TCP query created by the software in the computer is sent to the network via Ethernet port.
2. Being connected to the same network, RS485-ETH-N takes MODBUS TCP from the Ethernet port and converts
it to MODBUS RTU query.
3. RS485-ETH-N forwards the converted query to the serial device via serial port and waits for response until
timeout period expires (1 second is assumed to be enough for this scenario).
4. Serial device forwards the data that comes from RS485-ETH-N and that correspond to MODBUS RTU query
to RS485-ETH-N in the form of MODBUS RTU response from its serial port. RS485-ETH-N receives the
response from its serial port and converts it to MODBUS TCP response.
5. RS485-ETH-N sends the converted MODBUS TCP response to the network via Ethernet port.
6. Software in the computer notifies the user by using MODBBUS TCP response it had received from the network.
Taking this into account, serial communication and gateway settings of RS485-ETH-N should be
configured as follows:
Figura 3.9: Server Mode Communication Example