B&B Electronics Vlinx VESP211, Руководство пользователя

Страница: 50 / 67

Section 8 - Description of Serial Server Properties Vlinx VESR4x4 Serial Server
Page 50 of 67 www.bb-elec.com/
www.bb-europe.com/
Delimiter 1, Delimiter 2 and Delimiter Removal
.
Delimiters and Delimiter
Removal enable you to control how characters received on a serial port are
sent across the network. Delimiters are ASCII characters specified by the user
when configuring the serial server. The serial server takes action when it
recognizes the specified character(s) on its serial port.
 Delimiter 1 is a start delimiter. The range of ASCII values is 1 through
255.
 Delimiter 2 is an end delimiter . The range of ASCII values is 1 through
255.
 Delimiter Removal controls removing of Delimiter 1 and Delimiter 2
from the received characters before the received characters are sent to
the network.
How Delimiters Work. When only Delimiter 2 (the end delimiter) is
enabled, characters received by the serial port are accumulated in a
buffer. When the end delimiter is received on the serial port, the buffered
characters, including the end delimiter, are sent to the network. All
characters received after the end delimiter are again buffered until
another end delimiter is received.
When both Delimiter 1 (start delimiter) and Delimiter 2 (end delimiter)
are enabled, characters received by the serial port will be discarded until
the start delimiter character is detected on the serial port. The serial
server then buffers the start delimiter character and all subsequent
characters received after it until the end delimiter is detected. When the
end delimiter is received, the buffered characters, including the start and
end delimiters, are sent to the network.
When Delimiter Removal is enabled it removes the delimiter character(s)
before sending the other characters across the network.
DHCP (Dynamic Host Configuration Protocol) is a protocol used on special
servers that supply IP addresses to network nodes on request.
When DHCP is enabled on the serial server, on power up it sends a DHCP
request to the DHCP server, which assigns a dynamic IP address, subnet
mask, and default gateway to the serial server.
When DHCP is disabled (static IP addressing), the IP Address, Subnet Mask
and Default Gateway fields must be set manually by entering the appropriate
addresses in these fields. If you do not know what addresses to use in these
fields, ask your network administrator.