OPC90 Server
D
s, ODDs, OMSDD, ORCMs, O
When they are used, the Bailey interfaces
OL
RMCs, ORMSCs or OSTNs blocks are to be utilized.
should be assigned the same node address.
TN blocks in fast update mode. This allows the use of that interface for the
eature helps facilitate tuning of fast loops
ICE de
block s
ction
ncing options. Note that the
ime s
o func
depends on several factors. The most important
he A
ey inte
th
Those interfaces that
t
cing ar
SP
and INPCI01. Note
e sy
ill not
on
at have 1400 tag OIUs
on the
P
e SYNC_DCS, SYNC_RING and SYNC_NODE
only up
o
win
they
SYNC_
n
rce
ock
is also
y o
hen the PC clock is changed by more than 2 minutes.
a.) To
s
the ABB
ed.
Cho
i 9
Network 9
he
sys
a
t also be
e
addresses
com
ac
ly configur
esult in malfunction of
the
f
Note that
nfigure the node map
whe
Infi 90. Al
type should be
spe
the
ce is a NC
b.) Two time syncing options are available. The first is “PC Get & Set Bailey System
Time”. This option enables OPC90 to both set the ABB Bailey DCS time to
match the PC time and also set the PC time to match the current DCS time.
When OPC90 starts up with this option set it determines if another ABB Bailey
node is currently considered the time sync master. If another master exists,
OPC90 sets the PC time equal to the current DCS time. When it is determined
that no node is currently the time sync master, OPC90 becomes the master by
setting the DCS time equal to the PC time. OPC90 continues to monitor the PC
clock for changes in time that exceed 2 minutes. When that occurs OPC90 will
become the time sync master by setting the DCS time to the PC time. The
second time syncing option is “PC Get Bailey System Time”. This option enables
OPC90 to keep the PC time equivalent to the DCS time but keeps OPC90 from
ever setting the DCS time. This option is handy for keeping the PC time equal to
the DCS time that is being maintained by another time sync source.
c.) When the ABB Bailey DCS is an Infi 90 system and either time syncing option is
selected, the “Use DCS Timestamp” option may also be enabled. This option
causes the OPC time stamps associated with each data value to be set to the
time stamp generated within the DCS. Normally per the OPC foundation
specification, OPC90 generates the OPC value time stamp when the value is
sent to the OPC client. This option allows more precise time stamping data to be
associated with each value. It should be noted this occurs at the expense of
slightly reduced exception report throughput since each exception reported value
received from the interface will also include a 6 byte DCS time stamp. This
option provides sub second time stamp accuracy versus the 1-2 second time
Otherwise, when AOLs, DOLs, ODDs, OMSDD, ORCMs, ORMCs, ORMSCs and OSTNs are
not used, unique node addresses should be assigned to take advantage of the extra
throughput. When the interfaces are assigned unique addresses, exception report collection
will be temporarily stopped on the secondary interface when loop tuning software has one
ore more S
required STN fast update poll commands. This f
that typically require 4 or more updates per second even when the active database is very
large. When the STN blocks are taken out of fast update mode, exception report collection
on the second interface will resume.
2.) The DEV
finition
upport sele
of several time sy
ability for t
yncing t
tion correction
being that t
BB Bail
rface supports
e time syncing feature.
do not support ime syn
e NSPM01, IM
M01, IMCPM02, NCIU01
also that tim
ncing w
work properly
Network 90 systems th
present
ABB Bailey lant Loop. Th
tags are
dated when ne of the follo
d to fo
g time sync options are enabled. When
are, the
e. Th
DCS tag ca
be use
the DCS to be time synced to the PC cl
tim
automaticall
ccurs w
enable time
ices are Inf
yncing
0 and
Bailey system type must firs
0. When the system type is N
t be specifi
etwork 90 t
configured. This node map defines th
tem node m p mus
and type of nodes present on the ABB Bailey Plant Loop. Failure to
pleting and
time syncing
curate
e the node map could r
it is not necessary to co
eature.
n the system type is
so note that the Infi 90 system
cified when
interfa
IC01.
The RoviSys Company
Version 7.0
Page 68
