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Server Properties Configuration
36 Chapter 5 Manual Documentation Number: ESP901-902_0508m
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communications are ideal for 5 seconds the Serial Server will reset and
make itself available for another client connection.
TCP Alive Timeout
The Serial Server monitors TCP activity. If TCP activity stops for the
length of time specified in this field the connection will be closed. This
field can be set to any value between 0 and 255 minutes. If zero, or no
value, is entered into this field the server will not disconnect.
Connection Mode
The Connection Mode field has three options: Server, Client and
Client (no heartbeat). When Client or Client (no heartbeat) is
selected the Connection at field automatically becomes active
(allowing the user to select
Power up or Data Arrival).
• When using the
Virtual COM Port feature, select Server.
• When using a
TCP or UDP Socket program, select Server.
• When using
Paired Mode communication between two serial
servers set up one as a Client and the other as a Server.
• When connecting to a server that does not support
Heartbeat,
select
Client (no Heartbeat).
Delimiter HEX 1 and Delimiter HEX 2
These fields allow the user to enter two ASCII characters (in hex
format) that delimit the beginning and end of a message. When a
message with both these delimiters is received at the serial port, the
data contained in the serial buffer is placed in an Ethernet packet and
sent out the Ethernet port. If only Delimiter 1 is set (Delimiter 2 is zero
or blank), upon receiving Delimiter 1 the ESP901/902 will put all the
data in the serial buffer in an Ethernet packet and send it out the
Ethernet port. If serial data greater than 1 kilobyte is received it will
automatically be placed in an Ethernet packet and sent out the Ethernet
port .
Force Transmit
This field allows the user to set a maximum time limit between
transmissions of data. The value set in this field multiplied by 100 ms
determines the Force Transmit time. When the elapsed time reaches the
time configured in this field, the TCP/IP protocol will pack the data
currently in the serial buffer into a packet and send it out the Ethernet
port.