Convert Format Between The Network Number/Station Number And Ip Address/Port Number - Mitsubishi Electric Q03UDVCPU User Manual

3.5.2
Convert format between the network number/station number
and IP address/port number
This section provides an overview of the processing of the conversion method that is set in "Station No. <-> IP
Information Setting".
(1) Automatic response system
The automatic response system can only be specified when the CPU module is the request destination station or
relay receiving station.
There is no need to set the IP address and port number of the partner station.
The automatic response
system can be set.
Request message
Previous
station
When the CPU module receives other station access request message (command frame), the send source
network number, IP address, and UDP port number in the request message, are stored internally. The response
message (response) for the request message is returned to the destination IP address and UDP port number
calculated from the stored network number and station number. Therefore, by receiving the other station access
request message first, the communication partner stations can be maintained.
The maximum number of station information that can be set is 64. When more than 64 other station access
request messages are received, the CPU module starts deleting from the oldest data to store the station
information in the newly received request message. However, it is ignored if the station information is the same
as the station information already stored.
*1 Information from the same station is not stored twice.
CHAPTER 3 CONNECTION OF PROGRAMMING TOOLS AND GOT
Relay receiving station
CPU
module
Relay station
Relay
CPU
receiving
module
station
*1
Request source station
CPU
module
Ethernet
Relay sending station
CPU
module
Request destination station
Relay
sending
Response message
station
3
Next
station
39