RoviSys OPC90 - Analog Output Loop (Aol)

OPC90 Server
7.2 Analog Output Loop (AOL)
The AOL OPC90 block is used to send an exception reported output generated
tion reports can be received by by updates to the block input tag (IN). The excep
a Bailey console analog tag, Bailey Analog Input / Loop blocks (function code 26)
and Analog Input / Infinet blocks (function code 121). Note that this block does
not received data from an AOL block (FC 30) running in a Bailey controller. Use
the OPC90 AIL block for that purpose. The OPC90 AOL block will automatically
generate the appropriate quality, and alarming status based on the value
presented at the block input.
Restrictions: This OPC block can be utilized with all Bailey interface types except
serial port module (SPM, CPM02 & CPM03) and computer interface command
series (CIC).
TAGNAME TYPE ACCESS DESCRIPTION
ADDR_RING VT_I2 Config/Read Bailey CIU ring address.
ADDR_NODE VT_I2 Config/Read Bailey CIU node address.
ADDR_MODULE VT_I2 Config/Read Bailey CIU module address.
ADDR_BLOCK VT_I2 Config/Read Block number to establish this point at within
the Bailey interface (see note 1).
INIT_VALUE VT_R4 Config/Read Initial startup value
ZERO VT_R4 Config/Read Zero of IN/OUT value in engineering units
code.
SPAN VT_R4 Config/Read Span of IN/OUT value in engineering units
code.
SIG_CHANGE VT_R4 Config/Read Amount that IN must change, cycle to cycle
before it will be reported to Bailey. Expressed
as a percentage of the SPAN.
EU_CODE VT_I2 Config/Read Bailey engineering units code to use when
establishing this point.
MAX_TIME VT_I4 Config/Read If IN never changes significantly, it will be
reported at the maximum time interval
(seconds) defined by this attribute.
HI_LIM sed to derive
te 2).
VT_R4 Config/ The setting for th
Read/Write
e alarm limit u
the high alarm condition (see no
LO_LIM sed to derive VT_R4 Config/ The setting for the alarm limit u
Read/Write the low alarm condition (see note 2).
MESSAGE VT_BSTR Read Provides the block operational message.
TAG VT_BSTR Read Provides the block name.
TAGLONG VT_BSTR Read Provides the block long OPC path name.
TAGDESC VT_BSTR Read Provides the block descriptor.
IN VT_R4 Read/Write Input value to be exception reported to Bailey.
QUALITY VT_BOOL Read/Write Current quality (see note 3) of Bailey values
(0-good, 1-bad).
OUT VT_R4 Read Last input value reported to Bailey.
HI_ACT VT_BOOL Read High alarm active indicator.
LO_ACT VT_BOOL Read Low alarm active indicator.
Notes:
1.) Make sure the block number attribute is unique with respect to the other AOL, DOL,
ODD, OMSDD, ORCM, ORMC, ORMSC and OSTN OPC90 blocks associated with the
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