CHAPTER 3: SYSTEM INFORMATION
SNAP PAC R-Series Controller User’s Guide
21
All pr
ot
ocols ex
cept FTP can
also r
ead strat
egy variable
data fr
om the S
crat
ch P
ad
ar
ea of the M
emor
y M
ap
.
All pr
ot
ocols ex
cept
FTP can r
ead or writ
e
to
I/O points dir
ec
tly
thr
ough the M
emor
y
Map
.
Since all pr
ot
ocols can be used simultaneously
, while the strat
egy is running on the contr
ol side of the contr
oller and
peer-t
o
-peer communication is going on, c
oor
dination in accessing data thr
ough the REST API or r
eading and writing t
o
memor
y map ar
eas is critical t
o a
void conflic
ts
. T
he mor
e capabilities of the syst
em y
ou use
, the mor
e car
eful y
ou must be
in planning
.
O
ther Opt
o 22 contr
ollers can r
ead strat
egy variable data
fr
om the S
crat
ch P
ad ar
ea.
Pa
g
ing
Modbus/T
CP
har
dwar
e and
sof
tw
ar
e
File syst
em
Ent
erprise
database
3r
d-par
ty
sof
tw
ar
e
•
In
tellution
•
W
onder
war
e
A
ctiv
eX cust
om
application
(V
B,
C, C++,
database)
Ent
erprise
management
syst
em
An
y OPC
client sof
tw
ar
e
Control Side
Run P
A
C C
ontr
ol flow
char
ts
SNAP PAC R-series
controller
PAC Control
Use t
o cr
ea
te
flo
w
char
ts and
do
wnload strat
egy
to
SNAP P
A
C
R-series
PAC Display
(HMI)
Uses the same tag
database as P
A
C
Co
n
tro
l
Fi
xed memor
y ar
ea
(I/O point data)
Sc
rat
ch pad ar
ea
(strat
egy variable
SNAP PAC
EB-series I/O
SNAP PAC R-series
SNAP-PAC-S1
SMTP
SNMP
Modbus/TCP
1394-based
PAC Control
Database
FTP
OPC
I/O Side
Read/writ
e t
o points
using Memor
y Map
HTTP/HTTPS server
RESTful API
Databases
O
ther syst
ems
Io
T applications
