
34-16 Industrial Communication Systems
intervals since there is a communication jitter inherent to the BAT setting. erefore, the upper bound
for
the dea
d
int
erval
in a sta
tion
k is
σ
k
j Vp j j j
Vp k
i
Tp J Cp Vp Tp Tp
j
i
= + + =
, : minwith
produced in
(34.3)
where
J
Vp
j
is the maximum communication jitter of Vp
j
.
e
following
assumption
is
inherent
to
Equation
34.3:
a
local
aperiodic
request
is
only
processed
(setting
the
request
bit
in
the
RP _ DAT
frame)
if
it
arrives
before
the
start
of
the
related
ID _ DAT.
Hence,
the ter
m
Cp
j
is included in Equation 34.3.
34.5.5.7
A
periodic Busy Interval
e
worst-case
response
time
for
an
aperiodic
variable ...