SYSTEM ARCHITECTURE
SNAP PAC R-Series Controller User’s Guide
26
Al
l p
roto
cols ex
cept FT
P
ca
n al
so
re
ad str
at
eg
y
variable data fr
om the
Scr
at
ch
Pa
d ar
ea of the
Memor
y Map
.
Al
l p
roto
cols exc
ep
t
FT
P can
re
ad or
writ
e
to
I/O poi
n
ts
d
ire
ct
ly
t
h
ro
u
g
h
th
e Mem
o
ry
Ma
p
.
Since
all pr
otocols ca
n be used simulta
n
eou
sly
, whil
e
the str
at
egy is
running on the con
tr
o
l side
of
the contr
o
ller and
pe
er-t
o
-peer communication is
go
ing on,
co
or
di
nati
on in r
eading and writi
n
g t
o
m
em
o
ry
m
ap
a
re
as
is
c
ri
ti
ca
l t
o
a
vo
id
c
o
n
fli
ct
s.
T
h
e
mor
e capabilities
of the syst
em y
o
u use
, the mor
e
car
eful y
o
u must be in
planning
.
O
ther
Opt
o
22
co
ntr
o
llers can r
ead stra
te
gy variable
data fr
om the S
cr
at
ch
Pa
d
ar
ea.
Pagi
ng
Mo
dbu
s/
TCP
hardware and
software
Fi
le
sy
ste
m
Enterprise
databas
e
3rd-party
software
•
Intellution
•
Wo
nder
war
e
ActiveX
cus
tom
applicatio
n
(V
B, C
, C+
+,
databas
e)
Enterprise
management
system
Any OPC
client so
ftware
Con
trol Side
Run PAC Control
flowcharts
SN
AP
PA
C R-seri
es
contr
o
ller
PAC Control
Use to create flowcharts
an
d do
w
n
lo
ad
s
tra
tegy
to SNA
P
PAC R-series
PA
C
D
isl
a
y (H
MI)
Us
es th
e same tag
databa
se as
PAC Control
Fix
ed me
mor
y ar
ea
(I
/O po
in
t da
ta
)
Sc
ra
tc
h p
ad
a
rea
(str
ate
gy variabl
e dat
a)
SN
AP P
A
C
EB-series I/O
S
N
A
P
PA
C R-series
SN
AP
-P
AC-S
1
SM
TP
SNM
P
Mo
dbu
s/TCP
13
94
-b
ase
d
PAC Control
Database
FTP
OPC
I/O
Sid
e
Read/write to points
using M
emory
Map
