Mounting and Installation
6NH7811-0AA22 © Siemens AG 2002 All Rights Reserved
2-14 MD2 Modem (07/2002)
Table 2-12 Settings on the 10-pin DIL switch (character recognition)
Setting on
DIL Switch
Meaning
1234
OFF
ON
5678910
Character recognition asynchronous 11 bit :
This Character recognition mode must be set if the transmitted
message consists of a series of asynchronous characters, 11-bit each
(1 start bit, 8 data bits, 1 parity bit, 1 stop bit).
This is the standard setting for sending SINAUT ST1 or SINAUT ST7
messages. In this case message format FT 1.2, based on 11-bit
asynchronous characters, is normally used for transmitting over
dedicated lines.
1234
OFF
ON
5678910
Character recognition asynchronous 10 bit :
This Character recognition mode must be set if the transmitted
message consists of a series of asynchronous characters, 10-bit each
(1 start bit, 8 data bits, 1 stop bit).
This setting is required for transmitting SINAUT ST7 messages over
dedicated lines with the optional FT 2 message format. This format is
based on 10-bit asynchronous characters.
1234
OFF
ON
5
6789
10
MID off, idle state 0 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. Message intervals are not detected. The FSK transmitter
has to be switched off at the end of a message. The MD2 then gives 0
signal to the DTE.
1234
OFF
ON
5
6789
10
MID off, idle state 1 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. Message intervals are not recognized. The FSK
transmitter has to be switched off at the end of a message. The MD2
then gives 1 signal to the DTE.
1234
OFF
ON
5
6789
10
MID on (interval ³ 12 bit), idle state 0 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. If the receive signal is in the idle state (= 0 signal) for at
least 12 bits long, a message interval is recognized.
1234
OFF
ON
5
6789
10
MID on (interval ³ 12 bit), idle state 1 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. If the receive signal is in the idle state (= 1 signal) for at
least 12 bits long, a message interval is recognized.
1234
OFF
ON
5
6789
10
MID on (interval ³ 24 bit), idle state 0 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. If the receive signal is in the idle state (= 0 signal) for at
least 24 bits long, a message interval is recognized.
1234
OFF
ON
5
6789
10
MID on (interval ³ 24 bit), idle state 1 :
This Character recognition mode must be set if the transmitted
message consists of a series of any synchronous or asynchronous
characters. If the receive signal is in the idle state (= 1 signal) for at
least 24 bits long, a message interval is recognized.
Note
Details about the individual character formats are available in Chapter 4
Operating Modes and Character Recognition.
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