Operator Terminal System Manual - 11276916.pdf

Network Functions and Communication
9 Network functions in the terminal
Storing HTML files
via FTP
An FTP standard client, such as [DOP Tools] \ [DOP FTP Client], is used for transferring
and saving HTML files to and on the terminal.
See section "FTP server" on page 233.
The files are stored in (transferred to) the HTML library in the terminal file system.
File names must be assigned in DOS format (8.3). The length of the file name is limited
to eight characters. HTM is used as suffix.
The file INDEX.HTM must always exist.
Recommendations and restrictions for network communication
Optimal signal transfer is required for fast and efficient communication between terminals
and controller in a terminal network (BDTP network). Read the section "Efficient
communication" in chapter 7.1 and observe the requirements for optimizing the network
function in the terminals. A maximum of 3000 signals can be transferred in a terminal
network.
Example 1 A terminal network consists of three clients and a server. Each client can access 1000
signals. This means the server has to transfer 3000 signals to the individual clients. This
is also the case if the address ranges for the signals in the clients are identical. This way
the signal transfer capacity in the network is utilized optimally.
Example 2 The server should retrieve the addresses that were required by the clients. The server
then requests the controller status and sends it to the relevant client.
Example
A terminal network (BDTP network) consists of a server and five clients. Each terminal
contains 50 alarms with the same address. This means for the server that 50 addresses
need to be requested by the controller. In addition, the server must send 50 alarms to
the respective client (5 x 50). Consequently, the server must distribute 250 alarms in the
network.
250 System Manual – DOP11A Operator Terminals