16
This section applies to units which have the
serial communications interface option. Up to
99 units can be linked together. Unit status
can be accessed and many menu items can
be entered through the serial port. Data is
transmitted at selected baud rates using stan-
dard eight bit ASCII characters and one “stop”
bit. The unit does not check or transmit a parity
bit.
UNIT I.D. (DEVICE #)
Each unit in the hookup must be assigned a
unit number from 1 to 99. This can be entered
through the front panel (see step 5 of the
programming section). If “00” is assigned, the
unit can not be brought on line through the
serial port. The units will remain in an “off” high
impedance state until addressed by the as-
signed unit number. Once a unit is addressed,
do not address another unit until the data has
been sent and any data requested has been
transmitted back.
BAUD RATE
The baud rate is the speed at which data is
transmitted, expressed in bits per second.
Baud rates of 300, 1200, 2400 or 9600 are
available. Select the desired baud rate from
the menu. (see step 5 of the programming
section).
PRINT LIST
The serial interface card is equipped with a
strobe line. When the strobe line is activated
a user selectable set of data (print list) is
transmitted. This transmission can be sent to
a computer or printer. The print list consists of
eight selectable items: COUNT, RATE, PEAK,
VALLEY, PRE A, PRE B, LOW SET, HIGH
SET. The list can be entered through the front
panel (see step 5 of the programming section)
or through the serial port (read on).
HELP
A help command has been installed for easy
access of the command and data variables.
When help is needed, type a “?” and press
return (enter) whenever a unit is on line. The
following list will be transmitted:
D#XX:
S Set
E Exam
R Reset
G Lock
L*List
C*Count
R*Rate
P*Peak
V*Valley
A*PreA
B*PreB
L*Lo Set
H*Hi Set
J Lo Out
K Hi Out
N Norm
D Unit
E Input
G Hy/DrA
I Hy/DrB
M Time
T Baud
W Lock
X Meter
Y A Typ
Z B Typ
O Code
F RDec
Q TDec
U TFact
The unit transmits the unit ID (D#XX) as well as
the variables for the corresponding commands
and data. A “*” indicates that the data is
available for the print list.
RS 232/422 OPERATIONS
Содержание INT-69R
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