Multi-Host Mode - Ebyte NB183 User Manual

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NB183S&NB183_User Manual
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5.4.3 Multi-host mode

Relatively simple protocol conversion, only one Modbus master station can exist, while the multi-master mode can
access multiple Modbus TCP masters at the same time. When multiple Modbus masters access at the same time, the
Modbus gateway will perform bus occupancy scheduling (RS-485 bus Only one request can be processed at a time, while
the multi-host mode will be sorted according to the TCP request, and other links will wait), so as to solve the bus conflict
problem (currently, in the single-server mode, up to 9 Modbus TCP host connections are supported, and the multi- When
connecting hosts at the same time, attention should be paid to the matching of the request interval and the timeout time.
Otherwise, the serial port transmission rate is much lower than the Ethernet transmission rate, resulting in packet loss.
TCP server mode, and the slave can only be in the serial port, otherwise it will not work properly.
With the increase of the number of hosts, the Modbus timeout time should be increased accordingly. If multiple hosts are
required to make continuous high-speed requests, it is recommended to use a "storage gateway", and it is recommended
to configure "simple protocol conversion" when no multiple hosts are used.
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