Campbell Scientific CR10X Measurement and Control System - Manual (Page 146)

SECTION 9. INPUT/OUTPUT INSTRUCTIONS
9-14
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
3 - Serial port
76,800 baud to
SM192/716
D Measurement
0 - Differential
measurement
1 - Single-ended
measurement
05: FP Scan interval (ms,
minimum 1.333 x reps,
limited to 1.333-50 ms)
06: FP Number of scans (units
of 1000)
07: 4 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
serial output)
12: FP Offset (not used with
serial output)
Input locations altered: number of scans plus
number of samples saved before trigger
*** 24 CALIBRATION ***
FUNCTION
Put 19 calibration values into input locations. If
C (--) is keyed before entering the input
location, then the automatic calibrations are
simply displayed, not measured. Otherwise, the
calibration takes place only when Instruction 24
is executed; automatic calibration is disabled
(Section 13.7).
PARAM. DATA
NUMBER TYPE DESCRIPTION
01: 4 Input location number,
key C (--) for results of
automatic calibration
Input locations altered: 19
*** 25 PORT READ ***
FUNCTION
The status of a group of ports selected by a
mask is read and placed in an input location.
The status is a base 2 representation of the
ports converted to base 10. Port 1 is the least
significant bit. For example, if all ports are read,
and the port status is as follows:
PORT C8 C7 C6 C5 C4 C3 C2 C1
VALUE 128 64 32 16 8 4 2 1
STATUS 0 0 1 1 0 0 1 0
(0=low,
1=high)
Base 10 equivalent: 32 + 16 + 2 = 50
50 will be stored in the input location.
The mask is also base 2 representation; 1
indicates the port is to be read, 0 results in a 0
for the port regardless of the status of the port
(AND operation). For example, if 50 (see above
example) is entered for the mask, ports 2, 5,
and 6 are read. If only ports 4 and 5 are high,
the status will be 16 (port 4 is not read).
NOTE: Voltages in excess of 5.5 volts
applied to a control port can cause the
CR10X to malfunction.
PARAM. DATA
NUM. TYPE DESCRIPTION
01: 4 MASK (0-255)
02: 4 INPUT LOCATION TO
STORE RESULT
Input locations altered: 1
*** 26 TIMER ***
FUNCTION
This instruction will reset a timer or store the
elapsed time registered by the timer in seconds in
an Input Storage location. Instruction 26 can be
used with Program Control Instructions to measure