Campbell 21X Operator's Manual page 105

SECTION
9.
INPUT/OUTPUT INSTRUCTIONS
when done
measuring.
B
Trigger option
0 - Trigger
immediately
1 - Trigger
if above
limit (high)
2 - Trigger
if
below
limit (low)
3 - Trigger on rising
edge
4
-
Trigger on falling
edge
C
Destination
0 - Input Storage
1 -
Serial port 9600
baud
2
-
Serial port 76,800
baud
D
Measurement
0
- Ditferential
measurement
1
-
Single-ended
measurement
05: FP
Scan interval(ms, minimum
0.97 x reps, limited to 0.97-
50ms)
06: FP
Number of
scans (units of
1
000)
O7: 4
Trigger offset; the number
of samples saved before
trigger (not used with serial
output)
08: FP
Trigger limit (mV, unscaled
measurement)
09: 4
Excitation
voltage (mV)
10:
4
1st input location in which to
store data
11: FP
Multiplier (not used with
serialoutput)
12: FP
Otfset (not used with serial
output)
*** 26
TIMER
***
FUNCTION
This instruction will reset
a
timer or store the
elapsed time registered by the timer in an Input
Storage location.
Instruction 26 can be used
with Program Control instructions
to
measure
the elapsed time between specific input
conditions. There
is
only one timer and it
is
common to
alltables
(e.9.,
if
the
timer is reset
in
Table
1
and later
in
Table 2,
a
subsequent
instruction
in
Table
1
to read the timer will store
the elapsed time since the timer was reset
in
Table
2).
Elapsed time
is
tracked
in 0.1 second
increments but displayed as an
integer.
For
example, a 20 second elapsed
time
is d
as
"200".
The time starts over after reaching
a
maximum value of 65,536 - about 109 minutes.
The
timer is also reset in response to certain
keyboard entries:
When
tables are changed and compiled wit
the *0 Mode, the timer is reset
automatically.
When
tables are changed and then
compiled
in
the *B Mode, the timer
is
automatically reset and Tables
1
and 2 are
disabled. Entering
u*Oo
at
this point enables
both
tables and resets the timer.
3.
Entering ""6" after changing the tables
compiles
the programs, but does NOT
the timer.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
lnput location no. of
elapsed
time (or enter
0
to reset)
Input locations
altered:
1
(0
if
timer is being
reset)
*** 101
SDM-|NT8
***
The 8
channel IntervalTimer (lNT8)
is a
measurement module
which provides
timing information to the datalogger. Each
of
the 8 input channels may be independently
configured to detect either rising or falling
of either high level or
a low level signal.
Each
channel may be independently programmed.
See the SDM-lNT8 manualfor detailed
instructions and examples. This instruction
is
not in all PROM options.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
1.
2.
01:
9-12
01:
Address of
|NTS