Planar Wallnet, Настройка и эксплуатация

Страница: 75 / 88

69
ASCII Command Service
ASCII Command Service
WallNet has an optional network service that
relays commands received over the network out
its serial port. It responds with any reply received
from the displays connected to the serial port.
The format of the commands is exactly the same
as regular RS232 commands for the particular
display product. To get command details for the
specific display type, refer to the documentation.
The ASCII Command Service is disabled by
default as a security measure. To enable the
service, check the
Enable ASCII command
service checkbox on the Access Control page of
the WallNet Admin section of WallNet’s menus.
Be sure to save the WallNet configuration if
you want to make this change permanent.
The general sequence of events are as follows:
1 WallNet reads printable ASCII characters
from the network up to the first carriage
return (CR) or linefeed (LF).
2 Once a CR or LF character is read from the
network, WallNet then sends the whole line
out the serial port and waits for a reply.
3 WallNet reads printable ASCII characters
from the serial port up to the first CR or LF.
4 Once a CR or LF character is read from the
serial port, WallNet then sends the whole
response line back to the network
application.