Ai Block Modes; Ai Block Simulation; Ai Block Configuration; C.1.2 Ai Block Modes - Emerson Micro Motion 2700 Configuration And Use Manual

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FOUNDATION fieldbus function blocks
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C.1.2

AI block modes

The AI Function Block supports three modes of operation as defined by the MODE_BLK
parameter:
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C.1.3

AI block simulation

To support testing, either change the mode of the block to manual and adjust the output
value, or enable simulation through the configuration tool and manually enter a value for
the measurement value and its status. To enable simulation, the Simulation switch has to
be ON. With simulation enabled, the actual measurement value has no impact on the OUT
value or the status.
C.1.4

AI block configuration

A minimum of four parameters are required to configure the AI Block: CHANNEL, L_TYPE,
XD_SCALE, and OUT_SCALE.
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OUT_SCALE: The high and low scale values, engineering units code, and number of
digits to the right of the decimal point associated with OUT when L_TYPE is not
direct.
SIMULATE: A group of data that contains the current transducer value and status,
the simulated transducer value and status, and the enable/disable bit.
PV_FTIME: The time constant of the first-order PV filter. It is the time required for a
63% change in the IN value.
LOW_CUT: If percentage value of transducer input fails below this, PV = 0.
LOW_LIM: The setting for the alarm limit used to detect the LO alarm condition for
process variable in EU of PV_SCALE.
LO_PRI: The priority of the LO alarm.
HI_LIM: The setting for the alarm limit used to detect the HI alarm condition for
process variable in EU of PV_SCALE.
HI_PRI: The priority of the HI alarm.
ALARM_HYS: The percent amount the alarm value must return within the alarm
limit before the associated active alarm condition clears.
Manual (Man): The block output (OUT) may be set manually.
Automatic (Auto): OUT reflects the analog input measurement or the simulated
value when simulation is enabled.
Out of Service (O/S): The block is not processed. FIELD_VAL and PV are not updated
and the OUT status is set to Bad: Out of Service. The BLOCK_ERR parameter shows
Out of Service. In this mode, you can make changes to all configured parameters.
The target mode of a block may be restricted to one or more of the supported
modes.
Micro Motion Model 2700 Transmitters with FOUNDATION Fieldbus