Mitsubishi Electric Melsec Q Series User Manual page 83

3 COMMUNICATIONS VIA OTHER NETWORKS
Conversion
method
Automatic response system
IP Address computation system
Table exchange system
Use-together system
The automatic response
system can be set.
3 - 14
(4) Use-together system
(a) Overview of the Use-together system
1) This method uses both the IP address computation system and the table
exchange system.
2) Select this method to access other stations with the same Network No.,
accessing other stations in other networks or accessing Ethernet with different
Network No., and relaying from other networks to the Ethernet network
system.
3) The set target Ethernet module can be installed either at a
communication request source station, communication relay station, or
communication request destination station.
(b) Conversion processing of the Use-together system
1) When a communication request message (command frame) to access
other station is received, the communication request message is sent to
the next station obtained by the table exchange system at first.
2) If the IP address of the Ethernet module cannot be obtained by the table
exchange system, the IP address is obtained by the IP address
computation system in order to send the communication request message.
3) The response message (response) to the communication request
message is returned based on the return IP address and the data in the
conversion table or the stored data.
REMARKS
The relationship between the Convert Format and definition of the Ethernet module
installed station is as follows.
Communication request source station
1
( )
1 For the external device that completed the communication, the station can be a
communication request source station or a relay sending station.
Communication relay
receiving station
Ethernet module installed station definition
Communication relay station
Relay receiving station Relay sending station
: Can be designation
Communication request
source station
CPU
Communication relay
sending station
CPU E71 E71
(Communication relay station)
Communication request
MELSEC-Q/L
Communication request
destination station
1
( )
: Cannot be designated
E71
Ethernet
Ethernet
CPU E71
destination station
3 - 14