OPC90 Server
MY Text message indicating the ABB Bailey interface _DEVICE VT_BSTR Read
type (i.e. INICI03, CIC01, etc) and firmware
revision.
MY_RING VT_I4 Read Ring address of the Bailey interface.
MY_NODE VT_I4 Read Node address of the Bailey interface.
SHADOW_OK VT_BOOL Read Shadowing OK (0-Good, 1-Bad or Disabled)
SHADOW_MASTER VT_BOOL Read Currently Shadow Master (0-No, 1-Yes)
SHADOW_PRI_STATUS VT_I4 Read Shadowed CIU primary communication channel
status. A value of zero indicates good and one
means bad or not used.
SHADOW_SEC_STATUS VT_I4 Read Shadowed CIU secondary communication channel
status. A value of zero indicates good and one
means bad.
SHADOW_MY_RING VT_I4 Read Shadowed CIU ring address of the Bailey interface.
SHADOW_MY_NODE VT_I4 Read Shadowed CIU node address of the Bailey
interface.
SHADOW_MY_DEVICE VT_BSTR Read Text message indicating the shadowed ABB Bailey
interface type (i.e. INICI03, CIC01, etc) and
firmware revision.
SYNC_DCS VT_BOOL Read/Write Set this tag to request the DCS to be time synced
to the current PC clock time (see note 2).
SYNC_RING VT_I4 Read Ring address of current time sync master (see note
2).
SYNC_NODE VT_I4 Read Node address of current time sync master (see
note 2).
IMPORT_FILE VT_BSTR Read/Write CSV file to import (see note 3)
IMPORT_READ VT_BOOL Read/Write CSV file import control flag (see note 3)
IMPORT_RESULT VT_BSTR Read Result of CSV import request (see note 3)
Notes:
1.) The DEVICE Definition block is designed to support communication on one or two RS232
ports to a single Bailey interface or two RS232 or SCSI ports to redundant Bailey interfaces.
The first redundant scheme is single interface redundant channel. This scheme provides two
RS232 communication paths to a single Bailey interface. All Bailey interfaces except (SPM,
CPM, CIC, CIU01, INPCI01 and INICI03) have two RS232 ports available for communication.
The second port is switch selectable between a “utility” port and computer communication
cond 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 channel will resume. The second redundant scheme is dual
interfaces single channel. This scheme utilizes two Bailey interfaces. Each Bailey interface
can be assigned the same node address on the Bailey communication highway or given
unique addresses. When the Bailey interfaces are configured for the same node address,
the driver commands the primary interface online to the Bailey communication loop and
commands the secondary interface offline. The database is downloaded to both interfaces
so the secondary can be considered to be in a “warm” standby mode, ready to be
commanded online if the primary interface fails. When the Bailey interfaces are configured
for different node addresses the driver commands both interfaces online receiving exception
report data from each. This increases the effective data throughput. The decision of Bailey
node address assignment should be based on whether or not any OPC90 Server AOLs,
port. Setting it to a computer communication port allows it to be used for the single interface
redundant channel communication scheme. With single interface redundant channel, the
driver issues exception report read requests to both channels resulting in increased
throughput. If loop tuning software has one or more STN blocks in fast update mode,
exception report reading on the second channel is temporarily stopped and instead it is used
for polling the STN block process variable and control outputs. This feature helps facilitate
tuning of fast loops that typically require 4 or more updates per se
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