Campbell 21X Manuel de l'opérateur télécharger pdf (Page 31)

1.5.2

*A

MODE

The

*A

is used

to 1) determine

the

number of

allocated

to

Input,

Intermediatel and

Final Storage;

2) repartition

this 3)

check the

number

of bytes

remaining

in

memory;

4)

erase

Final

Storage;

an{

5)

to completely

reset the

datalogger.

*A

is keyed,

the first

value

displayed

is

{he

number of memory

locations

allocated to lhput

Storage.

Press A to

advance

through the

fiemory

values.

Table 1.5-2

describes

what the

values seen

in

the

*A

Mode

represent.

i

Description

of

Data

The number

of

memory

locations

currently

allocated

to

Input Storage.

This

value

can

be

changed

by

keying in the

desired

number

(minimum

of 28,

maximum

limited

by

available

memory).

The

number of

memory

locations

currently

allocated

to Intermediate

Storage.

This

value can

be

changed by

keying

in

the

desired

number

(limited

by available

memory).

A

03:

XXXXX

The numberof

memory

locations

currently

allocated

to

Final

Storage.

This

number

is

automatically

altered

when

the

number of

memory

locations

in lnput and/or

lntermediate

Storage

is

changed.

A minimum

of

768

locations are

always

retained

in Final

Storage.

A O4:XXXX

The

number

of bytes

remaining

in Program

memory

(978

bytes total).

Entering

978

will

ERASE

ALL

MEMORY

and

put

the

21X

through

the

initial

SECTION

1. FUNCTIONAL

MODES

The

numbers of

memory locations

allocated

to

Input,

Intermediate and

Final Storage

default at

power-up

to

the

values in

Table 1.5-1.

The sizes of

Input and

lntermediate

Storage

may be altered

by keying

in

the desired

value

and entering

it by

keying A.

The

size

of

Final

Storage

will

be adjusted

automatically.

When

lnput Storage

is increased

beyond

28

locations, all of

Input Storage

comes

out of

Final

Storage and

the

memory

previously

allocated to

lnput Storage

(112

bytes)

goes

unused.

This

is

because

memory

allocated to minimum

Input

Storage

is bounded

by

write

protected

program

memory.

When

more Input

Storage

is required,

Input Storage

must be

moved to

where-a

contiguous

block

of memory

is

available.

One

Input

or

Intermediate

Storage

location can

be

exchanged

for two Final

Storage

locations

and

vice-versa.

A

minimum

28 Input and

768

Final Storage

locations wiIIALWAYS

be

retained.

The size of

Intermediate

Storage

may

be

reduced to 0.

Alldata

in Intermediate

and

FinalStorage are

erased

when

memory is

repartitioned.

This

feature

may be

used to clear

memory

without

altering

programming.

The

number of

locations

does

not actually

need

to

be changed;the

same

value can be

keyed in and

entered.

After

repartitioning

memory, the

Tables must be

recompiled.

Becompiling

erases

lntermediate

Storage.

Recompiling

with

*0

erases

Input

Storage;

recompiling

with

*6

leaves lnput

Storage

unaltered.

lf lntermediate

Storage

size

is

too small

to

accommodate

the

programs

or

instructions

entered,

the

program

will

not

compile

and the

"E:04"

ERROR

CODE

will be displayed;the

size

of

Intermediate

Storage

must be

increased

before

the

program

willcompile.

Final Storage

size

can be

maximized

by

limiting

Intermediate

Storage size

to the

minimum

number

of memory

locations

necessary

to accommodate

the

programs

entered.

The

number of

Final Storage

locations and

the

rate at

which data are stored

determines

how

long

it

willtake

for

Final

Storage

to

fill, at which

point

new data

willwrite over

old.

Key

Disdlay

Entry lD:

fata

*A

01:

|XXX

I

A

or'1.***

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