Data Distribution Board Lbb 3512; Introduction; Hall Displays; 10.2.2 Required Ansi Support - Bosch DCN Manual
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- Installation and user instructions manual (114 pages) ,
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- User manual (24 pages)
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External Interface Manual
10
Data Distribution Board LBB 3512
10.1
Introduction
The DCN Data Distribution Board (DDB) is a DCN unit that is used to implement several features in the DCN
system. It has a serial output for connecting the various types of hall displays and digital outputs that can be
switched by inputs on another DDB or by the interpreter units connected to the DCN network. For information
on DDB DIP-switch settings, connector pins, etc. please refer to DCN Installation and Operation manual
[INST_MAN].
10.2
Hall displays
10.2.1 Introduction
A DCN hall display is a device that shows conference information to the public, usually on some kind of large
LED screen. The standard DCN hall displays contain an internal DDB. It is possible to connect a different
display to a DDB board as long as it is capable of handling the serial data sent by the DDB. To be able to use
the hall displays the LD application must be running.
For hall display the DDB must be set in passive mode with one of the hall display addresses as specified in
the Installation and Operating manual [INST_MAN]. Since passive mode is used on the DDB it is possible to
connect several DDB using the same address. Each of these will receive the same information.
Note: Except for the numeric display, all hall displays require that the DDB is set for a 19200 baud
connection. The numeric display can be connected to either 9600 or 19200 baud. The RS232 settings;
baud-rate (9600 or 19200) ,8 data-bits, 1 stop-bits, no parity, no handshake.
The serial data sent from the DDB to the display consists of ASCII text with ANSI escape codes for special
functions. Additionally, the <CR> should be interpreted as "move the cursor to column 1 of the current line".
The <LF> should be interpreted as "move the cursor 1 row down in the current column".
The status display is a special case. It receives ANSI codes and binary data.
10.2.2 Required ANSI support
The hall display connected to a DDB should be capable of handling all the ANSI escape codes specified in
this section. (Not all of these codes are currently in use but they should be implemented in the hall display for
future compatibility.)
Note: Whether ANSI co-ordinates start at 0 or 1 is often a matter of debate. The DCN defines the top-
left corner of the display as having co-ordinates (1,1).
<esc>[<line number>;<column number>H or
<esc>[<line number>;<column number>f
Cursor position: Moves the cursor to the specified position. If you do not specify a position (e.g. "<esc>[;H"),
the cursor moves to the upper-left corner of the screen (line 1, column 1). Both versions have the same effect.
<esc>[<numlines>A
Cursor up: Moves the cursor up by the specified number of lines without changing columns. If the cursor is
already on the top line, this sequence should be ignored. If omitted, numlines has a default value of 1.
<esc>[<numlines>B
Cursor down: Moves the cursor down by the specified number of lines without changing columns. If the cursor
is on the bottom line, this sequence should be ignored. If omitted, numlines has a default value of 1.
<esc>[<numcolumns>C
Cursor right: Moves the cursor to the right by the specified number of columns without changing lines. If the
cursor is already in the far right column, this sequence should be ignored. If omitted, numcolumns has a
default value of 1.
<esc>[<numcolumns>D
Cursor left: Moves the cursor to the left by the specified number of columns without changing lines. If the
cursor is already in the far left column, this sequence should be ignored. If omitted, numcolumns has a default
value of 1.
<esc>[2J
Erase display: Clears the screen and moves the cursor to the home position (line 1, column 1).
<esc>[K
Erase line: Clears all characters from the cursor position to the end of the line (including the character at the
cursor position). The cursor remains in the same place.
Bosch Security Systems B.V. | 2004 April | External Interface Manual
en | 41
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