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7. Troubleshooting
Item
Trouble state
1
STA is always on
2
STA led is blanking per 50 ms.
The GT-531 Series Utility can
3
not connect to the SMS-531
4
Can not receive the SMS
The defined phone received an
5
abnormal SMS
The SMS-531 is not replied by
6
Modbus command
Can not hear the voice alarm
7
from the SMS-531
SMS DBS could not received the
8
SMS from SMS-531
SMS-531 User's Manual v1.1
Solution
1. Check SIM card.
2. Check Antenna.
3. Check the 3G signal strength.
It shows the SIM card needs to input PIN or
PUK code. The SMS-531 is not set these code
or the wrong codes. You can set these code
in "System->Input PIN/PUK".
1. Check STA LED blinking every 1 sec.
2. Check the COM port wire connection.
Please confirm the transmitter's phone number
is in the groups.
The SMS-531 support only Unicode SMS.
Confirm the defined SMS content is Unicode.
1. Confirm the wire connection.
2. Confirm the Modbus ID of the SMS-531.
3. Confirm the COM port configuration.
Confirm the SD card is normal and the voice file
is in it.
User must add "ALARM;" to the start of the
short message.
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