19
20
~Pnn
Set Turn Around Delay (nn milliseconds) - This sets the
delay that the Model 2003 waits before sending data in
response to a command. The default setting in non-
addressed mode is 0, and in addressed mode the default set-
ting is 3 milliseconds. (NOTE: You must send two digits, i.e.
for 7 milliseconds, send ~P07)
5.6 KEYBOARD MONITOR COMMANDS
~M
Monitor ON - Turns keyboard monitor on
~N
Monitor OFF - Turns keyboard monitor off
5.7 OTHER COMMANDS
~T
Test Model 2003 - This command to the Model 2003 causes
it to undergo tests to validate the keyboard and computer
interface. You will see the keyboard LED’s cycle, testing the
keyboard interface. You should see on the PC screen:
TEST:7 (With the number cycling from 0-7)
The serial port displays:
Test: <ENTER> to stop
The test runs until <ENTER> is received.
~?
Request Status - The format of the response is:
AA-EEDDMBTV
where
AA is the address setting
-
is a dash character, Hex 2D
EE is a error status:
00-No Errors
01-Parity Error
02-Framing Error 03-Parity and Framing
DD LED status (bit field -0=OFF, 1=ON
b0-Scroll lock b1=Num Lock b2=Caps
Lock
M Mode setting (~C, ~H, ~K, or ~S)
B
Binary or ASCII Transfer Setting (~A or ~B)
T
Turn Around Setting (~I or ~L)
V
Monitor Setting (~M or ~N)
5.8 MULTIDROP OPERATION
If the DIP switch address setting is not zero, Model 2003 looks for
an address select prefix to any buffer received. The address must be
the first byte of the transmission and the high bit set. Address 1 is hex
81, Address 2 is hex 82, etc. If you send a command to address 80,
all Model 2003s will read the command.
When sending data to the Model 2003 in multi-drop mode, the
Model 2003 will return a single byte colon character when it receives
the message. This does not mean that you can send another buffer
can be sent but rather that the Model 2003 received the message and
the host can go on to talk to other devices. If a proper delay cannot be
assured, you should poll the device until it responds before sending
another buffer.
5.9 LED INDICATORS
The Model 2003 features three front panel LEDs that monitor data
activity on the keyboard and RS-232/RS-485 ports. Figure 10 shows
the front panel location of each LED. Following Figure 10 is a descrip-
tion of each LEDs function.
Keyboard
Turns solid yellow when the keyboard is
sending to the Computer. Blinks whenever
the Model 2003 is processing a command
from the RS-232/485 port. If Model 2003 is
set with an address, the LED blinks yellow
when it receives its address.
Receive
Blinks red when Model 2003 receives data
or commands on the RS-232/RS-485 port.
Transmit
Blinks green when Model 2003 transmits
data through the RS-232/RS-485 port.
Figure 3. Model 2003 Front Panel Switches
Ke
yboard
Receiv
e
Tr
ansmit
Address Rate
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
Data Rate
7
8
9600
4800
2400
1200
O
O
C
C
O
C
O
C
Open =
Closed =
➔➔
MODEL 2003 RS-232/RS-485
Keyboard Adapter
