eWON General Reference Guide - eWON wiki

General Reference Guide eWON Configuration
3.3.2.3.2 Web configuration
You get access to the COM1 (or COM2) VIRTUAL PORT CONFIGURATION page by following this path from the Main Menu navigation bar:
Configuration/System Setup/General/Net services/Virtual Com :
Figure 17: eWON Virtual COM port configuration page
You may first choose the COM port you want to configure in the COM Port: scrolling menu. You can then define the following parameters:
Control Description
Port Type Choose the port type between RawTCp, Telnet RFC2217 or Disabled.
TCP Port
Poll Signal Interval
Debug
Always accept new clients
Inactivity Timeout
Line parameters
HW Mode
The PC will have to connect to that TCP/IP port to communicate through the eWON serial port.
REM: if multiple VCOM are defined on the same eWON, they must all use a different TCP/IP port.
This parameter is only used in TELNET RFC2217 mode. In that mode the eWON will scan the modem port for
changes in modem line input levels (CTS, DSR, DCD, RING) thus this parameters defines the scan rate. The
default value of 100msec should be fast enough for most applications.
Activate the recording of debug info for VCOM. When activated, this function slows down the overall
perfomance of the eWON.
All debug info will be accessible in the Diagnostic->Real Time Log menu.
When a PC is connected to the eWON, then a socket is opened by the PC to the eWON. If for example the PC
suddenly switches off, the eWON will not know that the socket should be closed, and when the PC will try to
connect again, the eWON will refuse the connection. This option is provided in order to avoid that situation;
when checked, the eWON will always be ready for a new connection, and the new connection will replace the
previous connection. This means also that if one PC is connected to the VCOM port, and that another PC tries
to connect with this option checked, the new PC connection will be accepted and the existing PC connection
will be closed.
There is another way to avoid that an unused but opened socket prevents access to the eWON (if the
previous option has NOT BEEN checked). If you set this option with a value different of 0, then the eWON will
close its VCOM socket if there is no communication for a given amount of time. If serial communication is
supposed to occur all the time this option can be useful, but if silence in communication is expected, then this
option will obviously not apply.
Except for HW Mode, which is an "hardware parameter" (only configurable in the eWON), these parameters
are only used when the port is configured in RAW TCP mode, because in TELNET RFC2217 mode the PC
virtual port will usually change them. In any case, this will define the initial or default values.
Hardware Mode represents the hardware behavior of the serial link. Available values are :
• HalfDuplex
• FullDuplex with HardWare handshaking (default)
• FullDuplex with NO handshaking
REM: This mode cannot be controlled remotely by RFC 2217
Table 11: eWON virtual COM port configuration controls
RG-001-0-EN ver 1.14 eWON® - 02/05/2012 - ©eWON sa Page 21