DAEnetIP3
User Manual
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57
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12.2.
Applications
The main purpose of the UART is creating RS485 network accessed over single
IP (figure 49). Each DAEnetIP3 has serial address from 0 up to 254 (00-FE). The
address 255 (FF) is reserved for emergency situations. For RS485 network it must
be used UART<->RS485 converter (for example SN75176B).
Figure 49.
RS485 network with many DAEnetIP3.
Each DAEnetIP3 can be accessed over TCP/IP socket. This may be done over
WAN/LAN/WLAN. This controller is used to be said
TCP/IP<->serial bridge
. When
TCP/IP packet is received then it is checked if it is valid command and if the serial
address is the same and if yes then executes the command. In all cases the data
which has come in the TCP/IP socket is retransmitted out to the UART port. Then
(over RS485 usually) the data (command) is propagated to the rest DAEnetIP3
controllers in this serial network.
It is true the opposite
– when data is coming in to the UART port, it is decoded
(eventually) and resend to the TCP/IP socket (if there is established TCP/IP
connection or not).
Of course UART port may be used not only with UART<->RS485 converters, but
with UART<->RS232 (MAX232), UART<->USB (FT232) and other UART converters.
