vii
Selected Operating Details
1.
Storing Data
— Data is stored in Final Storage only by Output Processing
Instructions and only when the Output Flag is set (see Overview).
2.
Storing Date and Time
— Date and time are stored with the data in Final
Storage
only
if the Real Time instruction, 77, is used (see Section 11).
3.
Data Transfer
— On-line data transfer from Final Storage to peripherals
(printer, Storage Module, etc.) occurs only if enabled with Instruction 96 in
the datalogger program (see Sections 4 and 12).
4.
Final Storage Resolution
— All Input Storage values are displayed as high
resolution with a maximum value of 99999. However, the default resolution
for data stored in Final Storage is low resolution, with a maximum value of
6999. Results exceeding 6999 are stored as 6999 unless Instruction 78 is
used to store the values in Final Storage as high resolution values (see
sections 2 and 11).
5.
Floating Point Format
— The computations performed in the CR10X use
floating point arithmetic. Campbell Scientific’s 4-byte floating point num-
bers contain a 23-bit binary mantissa and a 6-bit binary exponent. The
largest and smallest numbers that can be stored and processed are
9 x 10
18
and 1 x 10
-19
, respectively (see Section 2).
6.
Erasing Final Storage
— Data in Final Storage can be erased without
altering the program by using the *A Mode to re-partition memory (see
Section 1).
7.
ALL memory can be erased
and the CR10X completely reset by entering
98765 for the number of bytes left in Program Memory (see Section 1).
8.
Password/Program changes during power-up
– When primary power is
applied to the CR10X, it tests the Flash memory and loads the current
program into RAM (see page vii and Section OV.5). If the ring line on the
9-pin connector is raised during this memory test, there will be a 128 second
delay before the program is compiled and run. This delay provides a
mechanism whereby you can edit or change the program before compiling
takes place. This feature can be useful if, for instance, you have a bad or
corrupt program in which you want to make minor corrections, or if you
have forgotten the various security passwords.
To raise the ring line, press any key on the CR10KD Keyboard/Display or
call the CR10X from a PC during power-up (i.e. while
‘HELLO’
is
displayed on the CR10KD).
If you press any key on the CR10KD during the power-up
sequence, either deliberately or inadvertently, you will raise the ring
line as described above, and initiate the 128 second delay. This can
cause confusion to new users who are unaware of the feature. You
will also experience similar problems if your communication
program is active and you initiate a power-up sequence while the
PC is attempting to communicate with the CR10X.
NOTE