CIE-H14 User Manual Ver. 1.1
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http://www.ezTCP.com
6
Serial Communication Modes
CIE-H14 provides RS232 to TCP/IP conversion function along with input/output port
monitoring and controlling function.
6.1
TCP Server
In this mode, CIE-H14 functions as a TCP server. CIE-H14 waits for a TCP connection from
remote hosts. Once one of hosts tries to connect to CIE-H14, it responses to that request.
After the connection is established, CIE-H14 converts the raw data from the serial port to
TCP/IP packets and sends the packets to the network and vice versa.
6.1.1
Key parameters
Local Port
This is a server’s port number which is used in the TCP connection.
Event Byte
With setting event bytes, users can handle the serial data before a TCP connection is
established.
Value
Description
0
CIE-H14 does not send the data.
Otherwise
(512 or under)
CIE-H14 sends the data right after a connection is established.
512 or under bytes are strongly recommended.
Table 6-1 Event Byte
Timeout
If there is no data transmission for the specific time, CIE-H14 terminates the
established TCP connection.
Notify IP Change
This function is for notifying information about changed IP address to a server. Not
only the TCP/UDP protocol but Dynamic Domain Name Service (DDNS) can be used.
Restriction of Access(ezTCP Firewall)
Users can block TCP connections from unauthorized hosts by using this option. Both
IP and MAC address are available.
