The Roles Played By The Various Areas - Panasonic FP2 ET-LAN Technical Manual

4.3.2 The Roles Played by the Various Areas

Initialization information setting area <Addresses 200H to 22FH>
These are used in the initialization processing of the ET-LAN unit.
-
These specify basic information such as the addresses and node numbers of source stations, and the
-
re-send setting time for the TCP.
These are also used to specify the area settings for the communication buffer used for transparent
-
communication.
Routing information setting area <Addresses 230H to 24FH>
These are used in the initialization processing of the ET-LAN unit.
-
These are specified when communication is being carried out from the ET-LAN unit with a node on an
-
Ethernet, through a router.
These are used to specify router IP addresses and sub-network masks.
-
These do not need to be set if communication is being carried out only on the network to which the
-
source station is connected.
Connection information setting area <Addresses 250H to 2CFH>
These are used for open processing of the ET-LAN unit.
-
These specify TCP and UDP settings, the method used for opening the ET-LAN unit, and the IP
-
addresses and port numbers of the node at the other end.
These can be specified separately for each connection, and are divided into eight blocks.
-
Initialization information notified area <Addresses 2D0H to 2DFH>
When the initialization processing for the ET-LAN unit has been completed successfully, the specified
-
conditions are stored at these addresses.
The contents stored here include source node IP addresses, MEWTOCOL station numbers, and other
-
information.
If the initialization processing was not completed successfully, the error code is stored here.
-
Connection information notified area <Addresses 2E0H to 35FH>
When the open processing for the ET-LAN unit has been completed successfully, the specified
-
conditions are stored at these addresses.
The contents stored here include IP addresses and port numbers for the destination nodes, and other
-
information.
If the open processing was not completed successfully, the error code is stored here.
-
Handshake area <Addresses 360H to 37FH>
This is the area in which the handshake takes place between the CPU unit and the ET-LAN unit.
-
The requests and completions for various types of processing such as initialization, opening, and
-
communication are carried out here, as well as confirmation that processing has been completed.
If the I/O is being used for the handshake, these addresses do not need to be used.
-
Error log area <Addresses 380H to 3FFH>
Error-related information such as the contents of communication errors and unsuccessfully completed
-
processing, as well as the contents of unit errors, are stored here as error codes.
Up to 14 codes can be stored here at one time for each unit.
-
The contents of these addresses can be confirmed using the shared memory readout menu in the
-
programming tools.
4-6