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the "port" parameter to 502 (the Modbus server's port). The Modbus gateway is
thus enabled.
If the serial port RTU device is the slave station, then the host computer Modbus
TCP software connects to port 502 of Modbus gateway. At this time, Modbus
gateway needs to work in TCP server mode. If the serial port RTU is the main
station, the Modbus gateway works on the TCP client side, and the destination IP
fills in the IP of the computer on which the Modbus TCP software resides, and the
destination port is generally 502.
7.2 Storage Modbus Gateway
7146 is a Modbus gateway with register storage. Compared with ordinary
ZLAN5142 (the end of which is 2 or 0 is non-storage), 7146 can save the read
contents of the registers in the gateway. In this way, the speed of Modbus TCP
query can be greatly improved, and the performance is superior when supporting
multi-host access.
