engineering units and the I/O options attribute (IO_OPTS). In addition, you can limit the SP
value and the rate at which a change in the SP is passed to OUT.
In Cascade mode, the cascade input connection (CAS_IN) is used to update the SP. The
back calculation output (BKCAL_OUT) is wired to the back calculation input (BKCAL_IN) of
the upstream block that provides CAS_IN. This provides bumpless transfer on mode
changes and windup protection in the upstream block. The OUT attribute or an analog
readback value, such as valve position, is shown by the process value (PV) attribute in
engineering units.
To support testing, you can enable simulation, which allows you to manually set the
channel feedback. There is no alarm detection in the AO function block.
To select the manner of processing the SP and the channel output value configure the
setpoint limiting options, the tracking options, and the conversion and status calculations.
C.4
Measurement Transducer block
The Measurement Transducer block contains the actual measurement data, including a
level and distance reading. The transducer block includes information about sensor type,
engineering units, and all parameters needed to configure the transmitter.
Table C-5: Measurement Transducer Block Parameters
Index
Number
Parameter
Description
1
ST_REV
The revision level of the static data associated with the
function block. The revision value increments each
time a static parameter value in the block is changed.
2
TAG_DESC
The user description of the intended application of the
block.
3
STRATEGY
The strategy field can be used to identify grouping of
blocks. This data is not checked or processed by the
block.
4
ALERT_KEY
The identification number of the plant unit. This
information may be used in the host for sorting alarms,
etc.
5
MODE_BLK
The actual, target, permitted, and normal modes of the
block. Target: The mode to “go to” Actual: The mode
the “block is currently in” Permitted: Allowed modes
that target may take on Normal: Most common mode
for target
6
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.
7
UPDATE_EVT
This alert is generated by any change to the static data
Reference Manual
F
OUNDATION
™
Fieldbus Block Information
00809-0100-5901
September 2019
Rosemount 5900C Radar Level Gauge
303
Summary of Contents for Rosemount 5900C
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Page 12: ...Introduction Reference Manual September 2019 00809 0100 5901 12 Reference Manual ...
Page 116: ...Installation Reference Manual September 2019 00809 0100 5901 116 Reference Manual ...
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