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5.3
LAN communication specification
External control via LAN is available. Use a serial communication cable to connect control devices such as
PCs and the MSD, and then control the MSD and get its status using commands. For character notation of
commands, refer to the ASCII codes or control using commands, use ports 6000 to 6999, 1100, and 23.
Connection will be disconnected if no communication for 30 seconds or longer after connection. For setting of
LAN, see section "7.11 LAN settings".
Physical layer
Network layer
Transport layer
Application layer
Turns green when a connection between the
MSD and hub or switch is established.
LAN connector
8 pin RJ-45 connector
(MSD rear panel)
The MSD supports Auto MDI/MDI-X, which distinguishes and switches straight/cross cables automatically.
5.3.1
The number of TCP-IP connections
The MSD can connect up to eight connections (8 ports) simultaneously. If the MSD is controlled from nine or
more PCs, they may not be connected to the MSD.
For nine or more connections, use your software to establish and close TCP-IP connections for each sending
and receiving communication commands. By doing so, connections are occupied and released in the MSD
side so that logically eight or more connections (eight or more ports) can be connected.
[Table 5.2] LAN communication
10BASE-T (IEEE802.3i)/100Base-TX (IEEE802.3u)
ARP, IP, ICMP
TCP
Port used for command control: 23, 1100, 6000 to 6999
Port used for WEB browser control (HTTP): 80, 5000 to 5999
HTTP, TELNET
1
8
Pin #
1
2
3
4
5
6
7
8
[Fig.5.5] LAN connector
The orange LED blinks when data is transmitted
or receivd.
Signal name
MDI
TX+: Transmitted Data+
TX-: Transmitted Data-
RX+: Received Data+
NC: Not connected
NC: Not connected
RX-: Received Data-
NC: Not connected
NC: Not connected
23
MSD-804FD User's Guide
MDI-X
RX+: Received Data+
RX-: Received Data-
TX+: Transmitted Data+
NC: Not connected
NC: Not connected
TX-: Transmitted Data-
NC: Not connected
NC: Not connected
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