Mitsubishi Electric MELSEC-L SERIES Basic User Manual page 144

Remark
The following is the outline of the internal process of an E71 when data is received in the "No Procedure" control method or
by broadcast communications. (The values specified in the buffer memory addresses 0
IP addresses and port numbers of the E71 in the own station as well as those of connected devices.)
Data received
Is the IP address of the
own station E71 the same as that of the
receive data request destination?
Is Destination
IP address FFFFFFFF
(Simultaneous Broadcast)
Is Destination Port No. FFFF
The application data of the received data is stored
in the fixed buffer.
Fixed buffer reception status signal (address:
5005 ) turns on.)
H
*1 When all the bits of the area expressing the host address of the IP address of the receive data request destination are 1,
proceed to "YES".
142
NO
YES
NO
?
H
YES
(Simultaneous Broadcast)
NO
?
H
YES
(Simultaneous Broadcast)
address (subnet address)
in the IP address of the own station
E71 the same as the network address (subnet
address) of the received data?
Are all the bits of the host address
of the received data 1?
*1
IP address the same as that of the receive
data request source?
Port No. the same as that of the receive
data request source?
The received data is ignored (discarded)
because it has not been sent to the own station.
, 1 and 28 to 5F
H H H
Is the network
YES
Is Destination
YES
Is Destination
YES
are used for the
H
NO
NO
NO