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SECTION
4.
EXTERNAL STORAGE PERIPHERALS
External
datf
storage devices
are used
to
provide
a data transfer medium that the user can carry from
the
test
site
tO
the
tab
and
to
supplement the internal storage capacity of
the
21X, allowing longer
periods betvveen visits to
the site.
The standard data storage
peripherals for
the
21X are the cassette
tape (Sectiott 4.3)
and the Storage Module (Section
4.4).
Output
to
a
printer or related device is also
possibte
(Seption
4.5).
These
peripherals are connected to
the
21X through the
I
pin serial connector.
Data output
lo
a
peripheral device can take
place
ON-LINE (automatically, as
paft of
the
21X's routine
operation)
ol
it can
be MANIJALLY INITIATED. On-line data transfer
is
accomplished with lnstruction 96
or with
the
"1
Mode (Section
4.1).
Manual initiation is done
in the
*8
or
*9
Modes (Section 4.2).
Regardless
Qf
the method, the source of any
data transferred is Final Storage.
A modem isSnother type
of
peripheral that can be connected to
the
21X.
Communication
via
a modem
(Telecommtlpications)
is
discussed
in Section
5.
The
21X
output data to multiple
peripherals (i.e., a tape recorder, modem, and Storage Module
could all be
at the same
time).
However, only
one cassette recorder and only one modem
may
be
to
the
2lX
at
any one
time. lt
is
possible
to
connect two Storage Modules, although
it
is seldom
The
21X
tellwhether or not
a
5M192
or
5M716 Storage Module
is
present.
When
lnstruction 96
or
*9
is
used
Module is
send
data to one
of
these Storage Modules,
the
21X will not send data if the Storage
connected (Section 4.4.2).
4.1
DATA TRANSFER
.
INSTR
96, *4 MODE
On-line
dataltransfer
is
accomplished with
Instruction $6
entered
in
the datalogger
program. T{re.4
Mode
is retained from earlier
soltware
to
rtnaintain
compatibility with existing
programs. tfse
only
one method to enable
output. lf u{ing
lnstruction 96,
do not enable
output
in
thd.4
Mode.
4.1.1
TNSTRUOTION
96
Instruction 96 enables output
to external storage
peripherals
Under
program
control' This
instruction rhust be included
in
the datalogger
program
for on-line data transfer to take place.
Instruction
96 needs to be included only once
in
the program tables, and should follow the Output
Processing
fnstructions. The suggested
programmirlg
sequence
is:
1.
Set the
Putput
Flag.
2.
lf you
v'iish
to set
the output array lD, enter
Instructfon
80 (Section
1
1).
3.
Enter
tfle appropriate Output Processing
Instructfons.
4.
Enter Instruction 96 to enable the on-line
transfer of Final Storage data to the
specified
device.
lf outputting
to both tape
and
a Storage Module or printer option,
lnstruction
96 must
be
entered twice.
Instruction
96 has a single parameter which
specifies
the peripheralto
enable. Table
4.1-1
lists
the output device codes.
TABLE
4.1-1. Output
Device Codes
for
lnstruction
96
CODE
DEVICE
00
Tape.
Data
transferred in blocks
of 512 Final
Storage Locations
lx
Printer, Printable ASCII
2x
Printer, Binary
30
SM192/716 Storage Module
31
Send filemark
to
SM192216
x
= BAUD RATE CODE
0
300
1
1200
9600
76,800
2
3
4-l
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