Industrial Communication Systems

WorldFip 34-11

Considering the WorldFIP characteristics, the BAT can be built as follows:

1.

From

the var

iable

wit

h

the sho

rtest

per

iod

til

l

the var

iable

wit

h

the lon

gest

per

iod

a.

If

the

load

in

each

cycle

plus

the

variable’s

length

(buer

transfer

length)

is

still

shorter

than

the

value

of

the

microcycle,

then

schedule

a

scan

for

that

variable

in

each

of

the

microcycles

(within

the mac

rocycle)

mul

tiple

of the per

iod

of the var

iable.

b.

If

the

load

in

some

of

the

microcycles

does

not

allow

scheduling

a

scan

for

that

variable,

schedule

it

in

a

subsequent

microcycle

up

to

the

microcycle

in

which

a

new

scan

for

that

vari-

able

sho

uld

be mad ...