Campbell 21X Manual do Operador descarregar pdf (Página 53)

SECTION

4.

EXTERNAL STORAGE

PERIPHERALS

3. Insert

the

plugs

on the free

end

of the

SC92A

or

SC93A

into

the DC-IN

and MIC

(and

Ear if

SC93A)

jacks

on the recorder.

4.

Simultaneously

press

the

RECORD

and

PLAY

buttons on the recorder

to set it

for

recording. With

the DC-IN

Jack

plugged

in,

the tape will not move

untilthe

dump

occurs.

5. To

test connections manually

initiate

transfer

by keying in

the

*8

commands as

listed in

Table

4.2-1.

The

tape

should

advance

as data is

transferred.

lf the Start

of dump location is

equalto

the End of

dump location,

the 21X willwrite

a

"dummy"

block

of data to tape.

lf

you

are leaving the recorder

on-line

(tape

enabled

with Instruction

96) it is a

good

idea to

write

a dummy

block of data to tape

(5

above) to

ensure

that

the recorder

is

correctly

connected.

Leave

the 21X in the

*0

Mode.

4.4

STORAGE MODULE

(SMl92n161

The

Storage Module stores data in

battery

backed

RAM. Backup is

provided

by

an

internal

lithium

battery.

Operating

power

is

supplied

by

the 2'lX over

pin

1 of

the 9

pin

connector.

When

power

is applied to the

Storage Module,

a

File

Mark

is

placed

in the

data

(if

a File Mark is

not

the last

data

point

already in storage).

The

File Mark

separates data. For

example,

if

you

retrieve

data

from

one 21X,

disconnect the

Storage Module

and connect it

to a second 21X,

a File Mark is

placed

in

the data. This

mark

follows

the data from the first

21X but

precedes

the data from

the

second.

The

SM192 has 192K

bytes of RAM

storage; the

SM716 has

716K bytes. Both

can be

configured

as either ring

or fill and stop memory.

4.4.1

USE

OF TWO STORAGE MODULES

It is

possible

to connect two Storage

Modules to

the 21X for

on-line storage.

One module

must

be

configured

as

fill

and stop

and the

other as

ring memory

(see

Storage Module

operator's

manual

for

configuring information).

Data

is

written

to both

modules simultaneously.

The

module

configured as fill

and stop

quits

accepting

data once

it is full

while

that with

the

ring

memory

continues to store new

data

over

old. The

Storage

Modules

must

be

retrieved

before the module configured

as ring memory

wraps

around memory

a second

time.

4.4.2

STORAGE MODULE

USE WITH

TNSTRUCTTON

96

.

When

output

to the

Storage Module is

enabled

with

Instruction 96, the

Storage Module(s) may

be either left with the 21X

for on-line

data

transfer

and

periodically

exchanged,

or

brought

to the site for data transfer.

USE

OF STORAGE

MODULE

TO PICK UP

DATA

The 21X

can

tellwhen

the Storage Module

is

connected.

Each time

Instruction

96

is executec

and there is

data

to output,

the

21X

checks

for

the

presence

of the Storage Module.

lf

a

Storage Module

is not

connected no data are

sent

and the Printer

Pointer

(PPTR,

Section

2.1)

is not

advanced.

When

a Storage

Module is

connected,

two

things happen:

1.

lmmediately upon connection, a File

Mark is

placed

in the Storage Module Memory

following

the last

data stored.

2.

During the

nelt

execution of Instruction 96,

the 21X detects the Storage Module and

outputs

all

data between

the

PPTR

and

the

DSP localion.

The File Mark allows the

operator to distinguish

blocks of data

from

different dataloggers or fron

different visits to the field"

lf

the SM is

just

brought

to the site to

pick-up

data, the SC90 Serial Line Monitor

can be

used

to

visually

confirm that data were

transferred.

The

SC90

contains

an LED which lights during

data

transmission.

When

the light

goes

OFF

data transfer is complete

and the SM can

be

disconnected

from

the 21X.

4.4.3

*9

DUMP TO STORAGE MODULE

In

addition

to the

on-line data

output

procedures

described above, output from 21X FinalStorage

to

the SM192 and SM716 can be manually

initiated

in the

*9

Mode. The

procedure

for

setting up and transferring

data

is

as follows:

4-6

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