(7) Connect to the SMS-531 and download these parameters to it.
2.
Modbus RTU commands
(1) Connect COM2 (RS-232) or COM3 (RS-485) of the SMS-531 to the Host.
(2) Sending the Modbus commands from the Host to the SMS-531 to transmit the
alarm SMS as follows:
SMS-531 User's Manual v1.1
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