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UM0934 Datasheet(PDF) 96 Page - STMicroelectronics

No. de pieza UM0934
Descripción Electrónicos  ST7570 S-FSK power line networking System-on-Chip
PDF  113 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0934 Datasheet(HTML) 96 Page - STMicroelectronics

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Extended functions
UM0934
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Doc ID 17389 Rev 2
Figure 24.
Alarm reception
7.2.3
Alarm repetition
If the node is a Server and is configured as REPEATER or ALWAYS_REPEATER (through
the MIB object 000Bh, Section 6.5.12) it repeats the alarms by sending NTX alarms. After
the transmission is complete, it ignores all alarms that it eventually receives in the next NREJ
time-slots.
If a CMD_AlarmRequest is sent during the alarm reception, repetition, or the reject window,
the ST7570 provides a positive confirm message without sending any additional alarms.
Figure 25
shows the behavior of a server, configured as REPEATER, (node 2) with NRX = 2,
assuming that node 1 is transmitting an alarm burst with NTX = 8 and NREJ = 9.
Figure 25.
Alarm repetition
Alarm
Reception (N
RX)
Reject Window (NREJ)
Alarm
Indication
NODE 1 (Initiator of alarms):
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
1
2
NODE 2 (Receiver):
Alarm RECEPTION
Alarm IGNORED
Alarm TRANSMISSION
Alarm
Reception
(NRX)
NODE 1 (Initiator of alarms):
NODE 2 (SERVER, repeater):
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
1
2
Reject Window (N
RE J)
2
3
4
5
6
7
8
1
Alarm
Repetition (NTX)
1
2
3
4
5
6
7
8
9
Alarm RECEPTION
Alarm IGNORED
Alarm TRANSMISSION
Alarm
Indication



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