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2.1.1 Virtual COM Port Mode
EDG series provide a virtual COM driver that works on Windows NT/
2000/XP systems. This driver establishes a transparent connection
between Host and serial devices. The driver will be installed on your
computer automatically while you install COM port mapping utility. You
have to use COM port mapping utility to configure the mapping between
the EDG serial ports and local COM ports on the host computer.
2.1.2 Data Mode
In Data mode, EDG-4508(R)+ and EDG-4516(R)+ can establish the a
TCP connection to a pre-defined host computer or device while serial
data arrives. EDG-4508(R)+ and EDG-4516(R)+ will terminate the
connection by the setting of Data Idle Timeout. This operation mode
supports 4 simultaneous connections. The Data mode provides a certain
amount of transparence and flexibility in transmitting data between
devices. If you wan to transmit data to any networking device from serial
device directly, data mode is a very perfect selection.
In data mode, the data from the serial port of one EDG-4508(R)+ and
EDG-4516(R)+ can be automatically sent to the other networking device,
without the need for an intermediate PC. Thus, serial devices will be no
longer bundled with operation system and behave like network devices to
send /receive data via Ethernet.
2.1.3 Control Mode
In controlling mode, the EDG-4508(R)+ and EDG-4516(R)+ 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 modem AT-style commands. The
serial devices can use these commands to control EDG-4508(R)+ and
EDG-4516(R)+ to connect or disconnect to remote networking device.
Thus, intelligent serial devices such as stand-alone PLC will send /receive
data to/from devices one by one via Ethernet.
7
Chapter 2
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