W&T 58031, Руководство пользователя

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93
W&T
Configuration of the serial port
Subject to error and alteration
n
Pin: RTS & Pin: DTR
The following functions can be assigned to the outputs
RTS and DTR:
1. Flow Control – If this function is turned on, the
Com-Server handles the RS232 flow control through the
corresponding output. The ready state for serial data is
signaled by a HIGH signal (+3...12V). If the memory limit
of the input buffer is reached, the line is set to LOW (-
3...-12V).
2. Show Connection – The output is switched to the
serial port depending on an existing TCP connection.
HIGH (+3...12V) indicates an existing connection.
3. NO (Default=HIGH) – The outputs are not used by
the Com-Server and carry a constant HIGH level
(+3...12V). A network application can use the control
port of the Com-Server (see „Enhanced services of the
Com-Server“) to temporarily influence the level.
4. NO (Default=LOW) – The outputs are not used by
the Com-Server and carry a constant LOW level (-3...-
12V). A network application can use the control port of
the Com-Server (see „Enhanced services of the Com-Ser-
ver“) to temporarily influence the level.
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PIN: CTS und PIN: DSR
The inputs CTS and DSR can be assigned the following
functions:
1. Flow Control – The serial flow control is performed
using the corresponding pin. Serial data are output only
if the input was set to HIGH (+3...12V) by the connected
terminal device.
2. OPEN/CLOSE – Connection This option for TCP
connection building and ending can be used to control
connection building and ending in all Com-Server client
operating modes. If the IP address and the TCP port are
stored in the Com-Server, a HIGH level (+3...12V) on the
corresponding input establishes a connection. The
connection is closed with a LOW level (-3...-12V).