Flowserve MX FOUNDATION Fieldbus Field Unit - Manual (Page 51)

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MX/QX FOUNdaTION Fieldbus Field Unit FCd LMENIM2330-01 – 08/11
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Transducer Block Parameters Description
ST_REV The revision level of the static data associated with the function block.
The revision value is incremented each time a static parameter value in
the block is changed.
TAG_DESC The user description of the intended application of the block.
STRATEGY The strategy field can be used to identify grouping of blocks. This data
is not checked or processed by the block.
ALERT_KEY The identification number of the plant unit. This information may be
used in the host for sorting alarms, for example.
MODE_BLK The actual, target, permitted, and normal modes of the block.
Target This is the mode requested by the operator. Only one mode from those
allowed by the permitted mode parameter may be requested.
Actual This is the current mode of the block, which may differ from the target
based on operating conditions. Its value is calculated as part of block
execution.
Permitted Defines the modes, which are allowed for an instance of the block. The
permitted mode is configured based on the application requirement.
Normal This is the mode, which the block should be set to during normal
operating conditions.
BLOCK_ERR This parameter reflects the error status associated with the hardware or
software components associated with a block. It is a bit string, so that
multiple errors may be shown.
UPDATE_EVT This alert is generated by any change to the static data.
Unacknowledged A discrete enumeration which is set to Unacknowledged when an
update occurs, and set to Acknowledged by a write from a human
interface device or other entity which can acknowledge that the alarm
has been noticed.
Update State A discrete enumeration, which gives an indication of whether the alert
has been reported.
Time Stamp The time when evaluation of the block was started and a change in
alarm/event state was detected that is unreported. The time stamp value
is maintained constant until alert confirmation has been received —
even if another change of state occurs.
Static Rev The static revision of the block whose static parameter was changed
and is being reported. It is possible for the present value of static revi-
sion to be greater than this because static can be changed at any time.
Relative Index The OD index of the static parameter whose change caused this alert,
minus the FB starting index. If the update event was caused by a write
to multiple parameters at the same time, then this attribute will be zero.
BLOCK_ALM The block alarm is used for all configuration, hardware, connection
failure or system problems in the block. The cause of the alert is
entered in the subcode field. The first alert to become active will set the
Active status in the Status attribute. As soon as the unreported status is
cleared by the alert reporting task, another block alert may be reported
without clearing the Active status, if the subcode has changed.
TRANSDUCER_DIRECTORY A directory that specifies the number and starting indices of the
transducers in the transducer block. For further information, please
refer to the Transducer Block Application Process – Part 1 (FF-902)
specification.
TRANSDUCER_TYPE Identifies the transducer that follows.