Advantech EKI-1521, User Manual

Page: 16 / 92

EKI-1521/1522/1524 User Manual 10
2.1.5 Serial Tunneling Mode
Two native serial devices can communicate over an Ethernet network without any
intermediate host PC and software programming. Serial Tunneling is very simple to
use. You can use Advantech Serial Device Server Configuration Utility to designate
one serial port as the tunneling master and another serial device server port as the
tunneling slave.
Figure 2.6 Serial Tunneling Mode
2.1.6 UDP Server/Client Mode
UDP is used primarily for broadcasting messages over a network. In the UDP server
mode, EKI-1521/1522/1524 access max. 8 hosts’ UDP message. In the UDP client
mode, EKI serial device servers transmit UDP message to max. 16 hosts simulta-
neously.
2.1.7 Control Mode
In controlling mode, the EKI serial device server presents a modem interface to the
attached serial device: it accepts AT-style modem commands to connect / disconnect
to other networking device. If you want serial device running application program to
connect/disconnect to different devices by request, you can use controlling mode.
The controlling mode provides three kinds of modem AT-style commands. The serial
devices can use these commands to control EKI-1521/1522/1524 connecting or dis-
connecting to remote networking devices. Thus intelligent serial devices such as
stand-alone PLC will send /receive data to/from devices one by one via Ethernet.