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(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:
Commands and Description:
Sending Alarm SMS
Commands
(Hex)
1. The SMS-531 receives the Modbus command then sends the alarm
message.
2. The content of the alarm SMS is "On Message" of Alarm Channel0
Description
message.
3. The alarm SMS would send to the defined phone groups.
The phones defined in the group0 would receive the SMS after 10 seconds.
Result
The content of the SMS is "Channel0 ON"
Command 01 05 00 00 FF 00 8C 3A
Response 01 05 00 00 FF 00 8C 3A
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SMS-531 User's Manual v1.1
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