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4.3.3 Configuration (continued)
B) Terminal Server
TCP/UDP*:
The iServer supports
TCP
and
UDP
protocols (default is TCP). If UDP is
selected, it can be configured either for Broadcast UDP or Directed UDP. In case of
Broadcast UDP, the iServer will transmit the data to every node on the network. This
can be accomplished if the Remote IP Address is set to 255.255.255.255.
The Broadcast UDP is a practical solution when one iServer needs to communicate
with multiple nodes over the network. In the case of directed UDP, the iServer will
transmit the data to a specific node on the network. This can be accomplished if the
Remote IP Address is set to the IP address of that specific node.
Server Type:
Continuous
mode sends the temperature, pressure and humidity to the
Ethernet, every two seconds. It is mainly used to send readings to a remote display or
logger.
Command
(default) mode needs a command to query the iServer to send the
response back to querying device.
Number of Connections:
The range is from
0 to 5
. If 0 is selected, the Terminal
Server feature is disabled. This means that no network connection can be made to
the sensor connected to the iServer. If 1 is selected, only one network connection
can be made to the iServer’s sensor. Any number higher than 1 would allow that
number of network hosts to read from the iServer simultaneously (default is 5).
Port:
(default 2000) is the default TCP port number for the port to which the sensor is
connected. Ports 1000 (used for HTTPget, refer to
Section 4.5
), 2002, 2003, and 2004
are reserved for internal use.
Terminal Server usually describes a device that exchanges data between
Ethernet/TCPIP networks and RS-232/RS-485 systems. With this iServer,
the data is obtained digitally from the sensor (irrelevant to RS-232 or RS-485
interface) and can be accessed from anywhere on the network.
A computer program, such as Mail Notifier, OPC Server, iLog or HTTPget can
send TCP requests and obtain readings using the Terminal Server feature.
C) Remote Access
Remote IP Address:
iServer can establish a connection to a remote device (e.g. an
iLD Remote Display with an Ethernet iServer embedded board).
Remote Port:
(default 2000) the port number for the remote device to which the data
is sent (e.g. an iLD Display).
Remote Access:
** Remote Access can be enabled and disabled. If enabled, the
iServer can send its data to a remote node on the same network (the “Remote IP
address” and “Remote Port” must be entered).
*TCP/UDP: when UDP mode is selected, Remote Access should be disabled
and Remote IP and Port are the UDP remote listening IP and Port. If the Remote
IP is set to 255.255.255.255, the UDP packet becomes a broadcasting packet
which will allow any device listening to the Remote port to receive the packet.
**If Remote Access is enabled, Terminal Server is automatically disabled.
