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...

Display Elements 

The FAC-2100

...

controller

...

contains

...

three

...

numeric

...

displays

...

to

...

indicate

...

signal

...

values

...

(

...

e.g.

...

,

...

the

...

process

...

variable,

...

set

...

point,

...

output,

...

etc.

...

)

...

These

...

displays

...

are

...

labeled

...

left-top

...

numeric

...

(four-digit),

...

left-bottom

...

numeric

...

(four-digit),

...

and

...

right

...

numeric

...

(three-digit).

...

The

...

four-digit

...

elements

...

display

...

values

...

in

...

the

...

range

...

of

...

-999

...

to

...

9999,

...

and

...

the

...

three-digit

...

elements

...

display

...

values

...

in

...

the

...

range

...

of

...

-99

...

to

...

999.

...

When

...

the

...

number

...

to

...

be

...

shown

...

is

...

above

...

the

...

range,

...

each

...

numeric

...

element

...

will

...

display

...

an

...

'H'

...

character

...

(indicating

...

a

...

HIGH

...

reading).

...

When

...

the

...

number

...

is

...

below

...

the

...

range,

...

each

...

element

...

will

...

display

...

an

...

'L'

...

character

...

(indicating

...

a

...

LOW

...

reading).

...

The

...

decimal

...

point

...

position

...

of

...

a

...

numeric

...

display

...

can

...

be

...

fixed

...

to

...

a

...

specified

...

digit

...

position

...

(for

...

display

...

consistency)

...

or

...

can

...

be

...

floating

...

(to

...

maximize

...

the

...

display

...

range).

...

When

...

the

...

decimal

...

point

...

position

...

is

...

fixed,

...

the

...

numeric

...

display

...

range

...

is

...

reduced.

...

For

...

example,

...

if

...

the

...

decimal

...

point

...

is

...

fixed

...

at

...

the

...

second

...

digit

...

of

...

a

...

four-digit

...

display

...

element,

...

the

...

values

...

shown

...

will

...

range

...

from

...

-99.9

...

to

...

999.9.

...

Signal

...

values

...

may

...

also

...

be

...

indicated

...

on

...

the

...

FAC-2100

...

bargraph

...

displays

...

(labeled

...

left

...

bargraph

...

and

...

right

...

bargraph

...

on

...

The

...

Front

...

Panel

...

).

...

Each

...

bargraph

...

contains

...

40

...

LED

...

elements.

...

Typically,

...

the

...

number

...

of

...

elements

...

illuminated

...

is

...

proportional

...

to

...

the

...

signal

...

value.

...

Alternatively,

...

each

...

bargraph

...

can

...

be

...

programmed

...

to

...

illuminate

...

a

...

variable-height

...

band

...

of

...

LEDs

...

above,

...

below,

...

or

...

centered

...

about

...

the

...

signal

...

value

...

of

...

interest.

...

Each

...

numeric

...

and

...

bargraph

...

display

...

can

...

be

...

configured

...

to

...

flash

...

on

...

and

...

off

...

when

...

a

...

user-specified

...

event

...

occurs

...

(

...

e.g.,

...

a

...

digital

...

input

...

channel

...

is

...

high

...

).

...

This

...

feature

...

can

...

be

...

useful

...

to

...

indicate

...

dangerous

...

operating

...

conditions.

...

It

...

can

...

also

...

be

...

used

...

to

...

indicate

...

manual

...

mode

...

operation.

...

The FAC-2100

...

controller

...

also

...

provides

...

three

...

eight-character

...

alphanumeric

...

display

...

elements

...

to

...

convey

...

text-based

...

information

...

to

...

plant

...

personnel.

...

ASCII

...

text

...

messages

...

(limited

...

to

...

256

...

characters

...

in

...

length)

...

can

...

be

...

scrolled

...

across

...

any

...

of

...

the

...

three-display

...

target

...

lines.

...

These

...

messages

...

can

...

be

...

presented

...

in

...

various

...

ways---they

...

can

...

flash

...

across

...

the

...

display,

...

scroll

...

at

...

variable

...

rates,

...

and

...

repeat

...

a

...

specified

...

number

...

of

...

times.

...

In

...

addition,

...

multiple

...

messages

...

can

...

be

...

assigned

...

to

...

the

...

same

...

target

...

line

...

simultaneously

...

(each

...

target-line

...

maintains

...

a

...

3-level

...

priority

...

queue

...

of

...

messages

...

to

...

display).

...