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(5) Connect to the SMS-531 and download these parameters to the SMS-531.
(6) Select the "System->Voice File Management" to download or confirm the voice
files of the Alarm0 ON/OFF and Alarm1 ON/OFF are in the SD card.
2.
Modbus RTU command
(1) Connect to COM2(RS-232) or COM3(RS-485) of the SMS-531 by RS-232 or
RS-485 of the Host.
SMS-531 User's Manual v1.1
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