Campbell Scientific CR10 CR10 Measurement and Control - Page 40

SECTION

1.

FUNCTIONAL

MODES

indicates the

flag

is

set.

In

the

above example,

Flags 4 and

7

are

set.

To toggle

a

flag, simply

press

the corresponding number. To

return

to

displaying

the

input location, press

"A".

Entering appropriate flag

tests

into

the

program

allows manual control of program execution.

Forexample, to

manually start the,execution of

Table

2:

enter

lnstruction 91 as the first

instruction

in

Table

2.

The

first

parameter

is

25

(do if Flag

5

is low), the second parameter

is 0,

go

to end of program

table.

lf

Flag

5

is low,

all

subsequent instructions

in

Table 2 will

be

skipped.

Flag

5

can

be

toggled from the

*6

Mode, effectively starting and stopping

the

execution

of

Table

2.

1.3.3

DISPLAYING AND TOGGLING

PORTS

The current status

of

the

use/s

pofis

can

be

displayed by hitting

"0"

while looking at

an

input

location (e.9.,

.640).

Ports are displayed left to

right

as

C8,

C7,

...

,

C1 (exactly opposite to the

flags).

A port configured as output can

be

toggled by hitting its number

while

in

the

port

display

mode.

There

is no effect on ports

configured as inputs.

On power

up

all ports are configured as inputs.

Instruction

20

is used to configure a port as

an

output.

Ports are also configured as outputs by

any program control commands

which

uses

the

poft as an output (pulse, set high, set

low,

toggle).

1.4

COMPILING

AND LOGGING

DATA.

*O

MODE

When

the

*0

Mode

is

entered

after

programming

the

CR10,

a

program compile

function

is

executed and the display shows

"LOG"

followed

by

the

program

table

numbers

that were enabled

at

compilation

time.

The

display is not updated after entering

*0.

NOTE: Alloutput

ports are set low,

the

timer

is reset, and data

values in

Input and

Intermediate Storage

are

RESET TO ZERO

whenever

the

program

tables

are altered

and

the

Program is recompiled with the

*0

Mode.

The

same

is

true when the

programs are compiled

with

*B

or

*D.

To

minimize current drain,

the CRlO

should be

left

in

the

*0

Mode when logging data.

1-4

1.5

MEMORY

ALLOCATION

.

-A

1.5.1

INTERNAL

MEMORY

There are

2

sockets

for

Random Access

(RAM)

and

1

socket

which

is used

for

(Programmable) Read

Only

Memory (PROM).

The standard CR10 has 64K

of

RAM:

a

32K

Chip in

each

socket.

Earlier

versions

had an

8K

RAM chip

in

each

socket.

Appendix

G

how to change RAM

and

PROM chips.

When powered

up

with

the

keyboard display

attached, the

CR1OKD

displays HELLO while

performing a self

check.

The

totalsystem

(RAM

and

ROM) memory

is

then

displayed

in

K

bytes.

The

size of RAM can be displayed

in

the

*A'mode.

There

are

1986 bytes allotted

to

Program

memory. This

memory may be used

for

1

table

or shared among all

tables.

Tables 3.9-1

to

3.

4

list

the amount

of

memory used by program

instructions.

lnput

Storage is used

to

store

the

results

of

Input/Output

and

Processing

Instructions.

The

values stored in input locations may

be

displayed using the

*6

Mode (Section

1.3).

The

results of

Output lnstructions

(data used

a

permanent record) are stored

in

Final Storage

when the Output Flag

is

set

(Section

3.7).

The

data

in FinalStorage can

be monitored using

the

*7

Mode (Section 2.3).

Intermediate Storage

is

a scratch pad

for

Output Processing

Instructions.

lt is used to

store

the

results of intermediate calculations

necessary

for

averages, standard deviations,

histograms,

etc.

Intermediate Storage is not

accessible by

the

user.

Each Input

or

Intermediate Storage location

requires

4

bytes

of

memory.

Each Final

Storage location requires

2

bytes

of

memory.

Low

resolution data points require

1

Final

Storage location and high resolution

data

points

require

2.'

Section

2

describes FinalStorage

and data retrieval

in

detail.

Table

1.5-1 lists

the basic

memory functions

and the amount

of

memory allotted to them.

Campbell Scientific CR10 CR10 Measurement and Control - Page 40

Data.

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