L3 Systems KeyAT, Manual

Page: 21 / 42

KeyAT Keyboard Port Adapter
L3 Systems 13 5/19/2007
Turn around setting
Data can be sent and interpreted one line at a time, or be
processed immediately. The default setting is for line turn
around mode (~L). This is better for automated control and
provides more reliable interaction. Immediate turn around
mode (~I) can better simulate keyboard operation. The setting
persists until the next ~I or ~L command, or until power is
cycled.
~L Line Turn Around
- Set to a line oriented basis, each
line must end with an <ENTER> or <CR>, hex OD.
~F Send <CR> mode
- This allows the <CR> to be sent on to
the computer as an <ENTER> key. (Note: address 58
sets this mode, see page 4.) A ~C command will clear
this.
~I Immediate Turn-around
- Data is interpreted 'on-the-
fly'. Note that in this mode <ENTER> or <CR> (Hex 0D)
is not a special character, and passed on to the
computer. XON/XOFF flow control is provided. However,
caution should exercised, as it is easy to overrun the
PC’s keyboard receive buffer. (Note: special address 59
sets this mode, see page 4.)
~Pnn Set Turn Around Delay (nn milliseconds)
- This sets
the delay that the KeyAT waits before responding to a
command. The default setting in non-addressed mode is
0, and in addressed mode the default setting is 3
milliseconds. (Note: you must send two digits. For 7
milliseconds, send ~P07.)
Keyboard Monitor
The KeyAT can send either binary key codes (~M) or ASCII
translations (~Q) of keys struck at the local keyboard through
to the RS-232/RS-485 port. The QWERTY monitor can be used