8. How easyE4 works internally
8.4 NET network
NET-ID1

NET-ID 2
PT16
ï¿«
GT 01
Parameter
NET-ID 1
PT 16
Station 4 sending a network marker [bit and word] to all stations.
NET-ID4

NET-ID 2
NET-ID 5
NET-ID 7
N 125
ï¿«
4 N 125
4 N 125
4 N 125
NW30
ï¿«
4 NW 30
4 NW 30
4 NW 30
This basic principle applies to all network markers in all data formats:
Network markers overlap in the various data formats
N1-8
N9-16
N17-
24
N25-
32
N33-
40
N41-48
N49-56
N57-64
NB1
NB2
NB3
NB4
NB5
NB6
NB7
NB8
NW1 NW2 NW3 NW4
ND1 ND2








N65-
72
N73-
80
N81-
88
N89-
96
N97-
104
N105-
112
N113-
120
N121-
128
NB9
NB10
NB11
NB12
NB13
NB14
NB15
NB16
NW5 NW6 NW7 NW8
ND3 ND4
etc.
Life signs NET stations
In order to make it possible for all NET stations within a group to be able to know
whether NET stations important to them are still communicating, each station cyc-
lically sends a heartbeat every second (1 s). If a heartbeat is not received, the cor-
responding error bit ID01 – 08 will be set to "1" until a heartbeat is detected.
Remote Run
If this flag is set, the NET stations in a group with NET-ID 02 through 08 will follow the
current operating mode of the NET station with NET-ID 1 (RUN or STOP).
easyE402/24 MN050009ENEaton.com
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