Planar Wallnet, Настройка и эксплуатация

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UDP Notes
72
as in: “telnet 192.168.12.12 57”, where
192.168.12.12 is the IP address of the WallNet.
Once connected, press [Enter] to see the “#
Clarity ASCII protocol server ready (TCP).\r\n”
message from WallNet, or type in any display
ASCII command (e.g. “OP--PATTERN?”) to do
simple interactive tests.
UDP Notes
• Because UDP is connectionless by nature,
more than one simultaneous client
application can be supported using UDP
datagrams.
• If WallNet receives an empty line (no
command text, followed by a CR or LF), it
responds with “# Clarity ASCII protocol server
ready (UDP).\r\n”.
• The UDP method can have an advantage over
TCP, since there is no connection to maintain,
and multiple applications can interact with
the wall instead of one application tying up
the one TCP supported connection.
General Notes
• If WallNet relays a command to the wall, but
receives no characters in response, it answers
“# ERR no RS232 reply\r\n”. This may not be
an error at all, but is the normal condition
when the command sent to the wall contains
wildcard address characters, such as
“OP**PATTERN=NONE”. The client
application should be aware of this and
handle (or ignore) it gracefully.
• If for any reason WallNet is unable to open its
serial port, it sends “# ERR unable to open
serial port.\r\n” in response to any command
sent by the client application.