OPC90 Server
disabled when unchecked. The state of configuration shadowing is displaye
the OPC90 program window status bar as follows:
d in
< >[] Bad
ing on
if
uch as block modifications, additions and deletions. So for example, when
e
OPC90 is operating
s the “Shadow Master” and “Shadow Slave”. Data such as the CIU state (online
ts
is done on the shadow slave, it is best to do this on the
PC90 currently operating as the shadow master. The current shadow state can
s
he two OPC90 servers. This data is useful when using OPC90 AOL,
OL, ODD, OMSDD, ORCM, ORMC, ORMSC and OSTN blocks. Nodes within
ndant OPC90 servers can be setup with CIUs having the same address.
ly one CIU will be commanded online. The other will have the database
o its CIU and ready to be commanded online when communication
dog time to a non-zero value. Settings in the range of 2-4 are
ommon.
See the device block for more information about the watchdog time.
[] [] Off
[]
ÅÆ
[] Good
[]
Bad Versions
The Device block also has tags that can be accessed by OPC clients to monitor
the state of configuration shadowing. See the Device block for more details of
what can be monitored.
Configuration shadowing has been designed to keep the standard OPC90 ABB,
CFG, CSV and SOE directories synced between two OPC90 servers runn
different PCs. These are sub-directories of the C:\Program Files\OPC90 Server\
directory (or the alternative path setup during program installation). Therefore,
the user stores files outside of these locations, configuration shadowing should
not be used.
In addition to keeping the above mentioned sub-directories synced with each
other, configuration shadowing also copies runtime changes to the database
s
blocks are added using the file import feature, those blocks are also added to th
other OPC90 server database.
Configuration shadowing will dynamically determine which
a
or standby), OPC90 start time and CIU addresses determine this role. The
Device block has a tag that reports the current role. Although no adverse effec
will occur if editing
O
be determined from the Device block faceplate.
5.3.9.1 Redundant Same Address CIUs
Configuration shadowing shares the communication state and address of CIU
between t
D
the ABB Bailey system that need to receive data from these blocks do not need
to be concerned with getting the block data from two different CIU addresses.
The redu
On
downloaded t
with the other OPC90 server fails or the other OPC90 server communication with
its CIU fails.
For this type of setup, it is important to configure the OPC90
Device block watch
c
The RoviSys Company
Version 7.0
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