P/N 466-5520-ML • REV C • ISS 16DEC19 3 / 42
LEDs
In the following LED descriptions, a flash is defined as 250 ms
on and 250 ms off. Groups of flashes are separated by 1 s off.
MI_ST (D1)
The MI_ST LED (green) displays the status of the
communication interface to the panel.
Table 2: MI_ST LED status
Power on (in case none of the cases
below are valid)
No power or power failure
Initialization OK, waiting for
communication
Everything OK, communication running
Failure in communication, waiting for
reinitialization
RSSI (D2)
The RSSI LED (green) indicates the field strength or signal
strength found by the GSM module. The number of flashes
indicates the level.
Table 3: RSSI LED status
No field strength (no network detected)
Field strength indication from poor (1) to excellent (5)
NET (D3)
The NET LED (green) indicates the status of the network. The
meaning of the number of flashes is described in Table 4
below.
Table 4: NET LED status
Registered to home network
Registered to roaming network
DATA (D4)
The DATA LED (green) indicates the status of the GPRS/LTE
communication.
Table 5: DATA LED status
GPRS/LTE is not available
GPRS/LTE is available, connection established
GPRS/LTE is available, connection established, sending data
GPRS/LTE is available, connection not established
CALL (D5)
The CALL LED (yellow) indicates status of the audio
information transmitted to the central station.
Table 6: CALL LED status
PSUE (D6)
The PSUE LED (red) indicates the status of the power supply.
Table 7: PSUE LED status
SIME (D7)
The SIME LED (red) indicates the status of the SIM card. The
meaning of the number of flashes is indicated in Table 8 below.
Table 8: SIME LED status
HB (D8)
The HB LED (red) indicates that the device is running.
Table 9: HB LED status
ATS7340 is not operational
ATS7340 is not operational