IDK MSD-804FD - Manual (Page 6)

MSD-804FD Users Guide (Command Guide)
6
1.2 LAN Port
The MSD-804FD controls peripheral devices externally using LAN. Connect control devices such as
computers and the MSD-804FD with LAN, and then control the MSD and acquire the status using commands.
For command character notations, see “2 ASCII code”. For 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 LAN settings, refer to “8.11 LAN Settings” in the Users Manual.
[Table 1.2] Spec of LAN communication
Physical layer 10BASE-T (IEEE802.3i)/100Base-TX (IEEE802.3u)
Network layer ARP, IP, ICMP
Transport layer
TCP
Port used for command control: 23, 1100, 6000 to 6999
Port used for WEB browser control (HTTP): 80, 5000 to 5999
Application layer HTTP, TELNET
[Figure 1.2] LAN connector
1.2.1 The number of TCP-IP connections
The MSD-804FD can connect up to eight connections (eight ports) at a time. If the MSD is controlled from
nine or more computers, 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, ports are occupied and released in the MSD side so
that logically eight or more connections (8 ports) can be connected.
Your PC software MSD-804FD
TCP-IP
connection → (Occupied by 1 port → 7
ports free)
Send command
(@xxx) →
← Send back command (@xxx)
TCP-IP close → (Release 1 port → 8 ports
free)
[Figure 1.3] Increasing connections