Manually Initiated Data Output - *8 Mode; Cassette Tape Option; Mode Entries - Campbell Measurement and Control Module CR10 Operator's Manual

Display
Key ID:DATA
*8 08:00
A 01:XX
A 02:XXXXX
A 03:XXXXX
A 04:00
4.2 MANUALLY INITIATED DATA
OUTPUT - *8 MODE
Data transfer to a peripheral device can be
manually initiated in the *8 Mode. This process
requires that the user have access to the CR10
through a terminal or the Campbell Scientific
Keyboard/Display. The *8 Mode allows the
user to retrieve a specific block of data, on
demand, regardless of whether or not the CR10
is programmed for on-line data output.
If external storage peripherals (cassette,
Storage Module, etc.) are not left on-line, the
maximum time between site visitations and
data retrieval must be calculated to ensure that
data placed in Final Storage are not lost due to
write-over. In order to make this calculation,
users must determine: (1) how large their Final
Storage is, (2) how many Output Arrays are
being generated, (3) how many low and/or high
resolution data points are included per Output
Array, and (4) the rate at which Output Arrays
are placed into Final Storage. When
calculating the number of data points per
Output Array, remember to add 1 overhead
data point (2 bytes) per array for the Output
Array ID.
For example, assume that 29900 locations are
assigned to Final Storage (*A Mode), and that 1
Output Array, containing the Array ID (1 memory
location), 9 low resolution data points (9 memory
locations) and 5 high resolution data points (10
memory locations), is stored each hour. In
addition, an Output Array with the Array ID and 5
high resolution data points (11 memory locations)
is stored daily. This is a total of 491 memory
SECTION 4. EXTERNAL STORAGE PERIPHERALS
TABLE 4.2-1. *8 Mode Entries
Description
Key 1 or 2 for Storage Area. (This window is skipped if no memory has
been allocated to Final Storage Area 2.)
Key in Output Device Option. See Table 4.1-1.
Start of dump location. Initially the TPTR, SPTR or PPTR location; a
different location may be entered if desired.
End of dump location. Initially the DSP location; a different location
may be keyed in if desired.
Ready to dump. To initiate dump, key any number, then A. While
dumping, "04" will be displayed in the ID field and the location number
in the Data field. The location number will stop incrementing when the
dump is complete. (Any key aborts transmission after completion of
the current data block.)

4.3 CASSETTE TAPE OPTION

4.3.1 CASSETTE RECORDER
locations per day ((20 x 24) + 11). 29900 divided
by 491 = 60.90 days. Therefore, the CR10 would
have to be visited every 60 days to retrieve data,
because write-over would begin on the 61st day.
Most likely the user would want to retrieve data
more often than this to perform a general
checkout of the station.
The output device codes used with the *8 Mode
are the same as those used with Instruction 96
(Table 4.1-1), with the exception of "all data to
tape" (09, with *8 all data between the start and
stop locations is always written) and the options
to transfer data from one Final Storage area to
the other (80, 81). Table 4.2-1 lists the
keystrokes required to initiate a *8 data dump.
The Model RC35 Cassette Tape Recorder or
equivalent can be left attached to the CR10 for
continuous on-line data recording or it can be
periodically taken to the CR10 site for the
manually initiated retrieval of the data
accumulated in Final Storage. The *8 Mode is
used to manually initiate tape transfer.
The RC35 Cassette Recorder offered by
Campbell Scientific is an inexpensive recorder
for use with the CR10 (also compatible with the
21X and CR7 dataloggers). The
record/playback function of each RC35 is
tested along with a head alignment procedure
prior to shipment. CR10/RC35 connections are
made with the SC92A Cassette Write Only
Interface or the SC93A Cassette Read/Write
Interface. The CR10 controls the on/off state of
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