Omega DPF76 - Manual (Page 22)

17
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 defaults to: 300
baud rate,"MARK" parity and device 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 "PROGRAM SETTING". You are now in the program-
ming mode.
SETUP PROCEDURE:
The following sections consist of the communications 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 displayed, 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 transmitted,
expressed in bits per second. Baud rates of 300, 600, 1200,
2400, 4800 or 9600 are available. 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 another 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 before 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 ignore 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).
STROBE LIST:
The serial interface card is also equipped with a strobe line.
When the strobe line is triggered, a chosen set of data will be
transmitted to be displayed or printed. The selections for the
display list are entered in the program mode. Enter "1" to add
selections to the list and enter "0" to delete selections from the
list. The seven available items for the strobe display list are:
(1) Preset A, (2) Preset B, (3) K-Factor A, (4) K-Factor B, (5)
Rate of A, (6) Count A, (7) Count B. In the "A net B" mode
Count A will display the Net Count and Count B is an invalid
command and the unit will transmit useless data. When
setting the strobe list the unit will print :
ENTER STROBE LIST:
DO NOT DISPLAY-0 DISPLAY-1
The unit will prompt you:
PRESET A<DISPLAY>?
PRESET B<DISPLAY>?
K-FACTOR A<DISPLAY>?
K-FACTOR B<DISPLAY>?
RATE<DISPLAY>?
COUNT A<DISPLAY>?
COUNT B<DISPLAY>?
If the above choices are entered, when the strobe line is
triggered (3-30V positive pulse) the unit will transmit:
DEVICE# 1:
PA XXXXX
PB XXXXX
KA XXXXX
KB XXXXX
DR XXXXXX
DA XXXXXX
DB XXXXXX
(SEE COMMANDS BELOW FOR DESCRIPTION OF COM-
MAND CODES).
Each time the strobe line gets triggered the unit will transmit
this data unless the program mode is entered and the strobe
list altered.
After these four items have been entered they will remain
unaltered unless the program mode is entered again and the
values changed. The unit is now set and must be addressed
by its device number to come on line again.