Convert Format Between The Network No./Station Number And Ip Address/Port Number - Mitsubishi Electric Melsec Q Series User Manual

3 COMMUNICATIONS VIA OTHER NETWORKS

3.3.2 Convert format between the Network No./station number and IP address/port number

The automatic response
system can be set.
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The process overview of the conversion method set by the Station No. <-> IP information
screen for performing the other station access via Ethernet module using the CC-Link IE
Controller Network, CC-Link IE Field Network, MELSECNET/H, MELSECNET/10 relay
communication function is explained.
Select one of the conversion methods to set.
(1) Automatic response system (Convert format of Ethernet module
default value)
(a) Overview of automatic response system
1) The automatic response system differs from the other convert
format in that designations can only be made when the Ethernet
module installed station is the communication request destination
station or communication relay receiving station.
2) The partner station IP Address or port number setting are not
necessary with this conversion method; therefore, relay
communications via other networks can be performed easily.
Communication relay
receiving station
(b) Convert format of Automatic response system
1) When the Ethernet module receives other station access
communication request message (command frame) from the CC-
Link IE Controller Network, CC-Link IE Field Network,
MELSECNET/H, MELSECNET/10 relay communication function,
the send source Network No., IP address, and UDP port number in
the request message, are stored internally.
The response message (response) for the communication request
message is returned to the destination IP address and UDP port
number calculated from the stored Network No. and station number.
Therefore, by receiving the other station access communication
request message first, the communication partner stations can be
maintained.
2) The maximum number of station information that can be set is 64.
When more than 64 other station access communication request
message is received, the Ethernet module starts deleting from the
oldest data to store the station information in the newly received
message communication request message.
However, it is ignored if the station information is the same as the
station information already stored.
Communication request
Communication relay
sending station
CPU E71 E71
Information from the same station is not stored twice.
MELSEC-Q/L
source station
CPU E71
Ethernet
Ethernet
CPU E71
Communication request
destination station
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