11
INTERFACE CARD RS 232/422 OPERATION
RS 232/422 SET-UP:
All serial communication mode changes must be
done through serial communications. Mode
changes cannot be done through the front panel.
To initialize the unit, place a jumper between pin
7(+12V )[bottom board] and pin 1(init) (DB -9
connector) on initial power up. The unit de-
faults to: 300 baud rate,"MARK" parity and de-
vice number 01. To enter the program mode you
must set your terminal for 300 baud rate and
"MARK" parity. Next, type D1(s), (s)= space
bar. The unit will echo back "DEVICE #1:".
Now type EP (enter program) and a carriage
return (enter). The unit will echo back "PRO-
GRAM SETTING". You are now in the pro-
gramming mode.
SETUP PROCEDURE:
The following sections consists of the communi-
cations setup options as they appear in the
menu. (If you wish to exit the program mode, at
any time you can hit the "escape key" (Hex
Code: 1B) and the unit will save the changes
made but not effect the remaining data values.)
When each section of the setup menu is dis-
played, the current data will appear in the < >
signs. If you wish to change the data, type in
the number of the desired choice and press return
(enter). If you wish to keep the current data,
simply press return.
DEVICE NUMBER:
Each unit in the hook-up must be assigned it's
own device number (1 to 99). Zero is reserved
for a dedicated hook-up to only one terminal,
and it's transmit output line remains in an "on"
active state. The device number is entered in the
program mode. The unit will prompt you:
DEVICE# <XX>?
If XX is the desired device number press return
(enter), If not enter the desired number after the
question mark and press return (enter).
BAUD RATE:
The baud rate is the speed at which data is trans-
mitted, expressed in bits per second. Baud rates
of 300, 600, 1200, 2400, 4800 or 9600 are avail-
able. When in the baud rate section of the menu,
the unit will list :
BAUD RATES:
1:300 2:600 3:1200
4:2400 5:4800 6:9600
then prompt you:
BAUD RATE <300>?
Press return (enter) if this is the desired baud rate
or enter the assigned number of one of the six
possible baud rates. If an invalid baud rate is
entered the unit will prompt you to choose an-
other baud rate. This will occur until a valid
baud rate is entered or escape is pressed.
PARITY:
Parity is a bit of information that is inserted be-
fore the stop bit and is used to help check if the
transmission is correct. When setting the parity
you may select "ODD" (parity bit is logic 0 if
total number of logic 1's in the first seven data
bits is odd), "EVEN" (parity bit is logic 0 if total
number of logic 1's in the first seven data bits is
even), "MARK" (parity bit is always logic 1 -
High / Mark) or "SPACE" (parity bit is always
logic 0 - Low / Space). If a "MARK" parity is
chosen, it will appear that two stop bits are used.
Use the "MARK" parity with terminals using
parity "OFF" or "NONE". These terminals ig-
nore the parity. The unit does not check the
parity but does transmit the parity chosen. When
setting the parity, the unit will print:
PARITIES:
MARK-0 SPACE-1 EVEN-2 ODD-3
Then the unit will prompt you:
PARITY<MARK>?
If this is the desired parity press return (enter), if
it isn't enter the number of the desired parity then
press return (enter).
