October 2018
Intermediate to advanced
962 pages
40h 41m
English
Content preview from Industrial Communication Systems
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Prosafe 46-11
while a 4-octet (32 bit) CRC2 is used for 13–123 bytes. e monitor will cause the fail-safe values to be
set
whenever
more
than
one
such
fault
is
detected,
i.e.,
one
detected
corrupted
message
can
be
tolerated.
A
second
corrupted
message
detected
within
time
T
indicates
a
serious
cause,
e.g.,
excessive
EMI,
hard-
ware
fai
lures,
etc
.,
tha
t
req
uires
imm
ediate
att
ention.
46.3 Deployment
Prosafe would not be complete if there were only a specication of the safety communication protocol.
For
F-D
evices
que
stions
wou
ld
be rai
sed
abo
ut
vol
tage
pro
tection,
ins
tallation
rul
es,
and sec
urity.
46.3.1 Power Supplies and Electrical Safety ...
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