Mitsubishi Electric MELSEC-L Series - Page 144

142
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
H
, 1
H
and 28
H
to 5F
H
are used for the
IP addresses and port numbers of the E71 in the own station as well as those of connected devices.)
*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".
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
H ?
(Simultaneous Broadcast)
Is Destination Port No. FFFF
H ?
The application data of the received data is stored
in the fixed buffer.
Fixed buffer reception status signal (address:
5005
H ) turns on.)
The received data is ignored (discarded)
because it has not been sent to the own station.
Is Destination
Port No. the same as that of the receive
data request source?
Is Destination
IP address the same as that of the receive
data request source?
Is the network
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?
YES
NO
YES
(Simultaneous Broadcast)
YES
(Simultaneous Broadcast)
NO
*1
NO
YES
YES
YES
NO
NO
NO