26 U02124ML-01-UK
ADDENDUM TO 6155AS OWNERS MANUAL
From revision B of the program code, the 6155AS display incorporates
additional features.
The 6th character of the display will now show "b" at power-up.
ASCII
hex
Code Keyboard
character
Function
04 EOT Ctrl D Switches the display to behave to a sub-
set of BS4504
12 DC2 Ctrl R Sets the display to 25% brightness
14 DC4 Ctrl T Sets the display to 100% brightness
18 CAN Ctrl X Sets the display to 50% brightness
(normal)
02 STX Ctrl B Start message (BS4504)
03 ETX Ctrl C End message (BS4504)
Table. 1 Additional recognised codes.
BS4504 SUB-SET PROTOCOL.
The display powers-up normally responding to any valid received
characters. If the character EOT is received at any time the 6155AS
changes to a sub-set of the BS4504 protocol.
The four characters immediately following EOT are then interpreted as the
group number (sent twice) and the ID number (sent twice).
If these characters correspond to the EQUIVALENT ADDRESS of the
display set on the front panel DIP switches (see Table.2) the display
becomes active. Otherwise it ignores all further characters until EOT is
again transmitted.
Once active, the STX character starts the recognition and display of
characters. ETX is used as a terminator and inhibits further operation and
also causes the “strobe" function when operating in MODE 2.
Rev Eco. No Date By CHK
A U10142 28 Nov 90 GH
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