DO
Default Operating Parameters
The
D
efault
O
perating command affects four modes of operation - 1) how the PPT handles a command
when a parity error occurs, 2) a value that represents the number of PPTs on the RS-232 bus, and 3)
noise protection when running in the continuous pressure (
P4
) mode.
(Default:
DO=E0N
)
Inquiry: *dd
DO
Action: *dd
WE
*dd
DO=
{
E
|
R
} or
*dd
DO=
numPPTs
or
*dd
DO=
{
N
|
P
}
EEPROM Store: *dd
WE
*dd
SP=ALL
E
Execute the command in the event of a parity error.
R
Reject the command in the event of a parity error.
..............................................................................................................................
numPPTs
RS-232 configuration only
A decimal number from 0 to 9.
The number 0 should be used if a single PPT is connected. When 2 or more PPTs are
on the bus, the correct number is calculated by dividing the number of PPTs by 10
and rounding up to the next whole number.
..............................................................................................................................
N
Normal
operation.
P
Noise protection when running in the
P4
continuous mode. This option reduces the
chance that noise will cause transmission to stop during continuous
P4
pressure
readings. In this mode, the PPT will respond normally to computer sent commands
that are transmitted as a contiguous character string, but ignores commands that are
typed in manually. In this mode, the
P4
command can only be interrupted manually
by rapidly entering 3 suspend characters ($)
and
an asterisk (*). Once the pressure
readings have stopped, the desired command can be entered within a 5 second period.
Otherwise, the continuous pressure readings will resume.
Note
: To run
P4
for a RS-485 unit, the
TO=C
option must be set.
4 5
