SMAR FP302, Руководство по эксплуатации и техническому обслуживанию владельца

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FP302 - Operation, Maintenance and Instructions Manual
3.4
FP302 – Fieldbus Pressure Transducer
Description
The transducer block receives the desired pressure value through the FINAL_VALUE coming from
the AO block and returns the pressure value generated via the RETURN parameter. The
engineering unit and the final value rate are selected from the XD_SCALE in the AO block.
The allowed units are:
•
Pa,
•
KPa,
•
MPa,
•
bar,
•
mbar,
•
torr,
•
atm,
•
psi,
•
g/cm²,
•
kg/cm²,
•
inH
2
0 to 4
°
C,
•
inH
2
O to 68
°
F,
•
mmH
2
0 to 68
°
F,
•
mmH
2
0 to 4
°
C,
•
ftH
2
0 to 68
°
F,
•
inHg to 0
°
C,
•
mmHg to 0
°
C.
The XD_SCALE range must be within the selected unit range (3-30 psi). The supported modes are
OOS (Out Of Service) and AUTO. Since the transducer block runs together with the AO block, the
transducer block moves to AUTO only if the AO block mode is already on AUTO. The module
temperature sensor may be read through the SECONDARY_VALUE parameter.
Warning messages may appear on the RETURN status or on the Error Block in some cases, as
explained below.
Supported Modes
OOS and AUTO
BLOCK_ERR
The transducer block BLOCK_ERR will reflect the following causes:
Block Configuration – When the XC-SCALE has an improper range or unit.
Output Failure – When the mechanical module is disconnected on the primary electronic board, or
when there is no air suppy.
Out of Service – When the block is on OOS mode.
Return Status
The transducer block RETURN status will reflect the following causes:
-
Bad::NonSpecific:NotLimited – when the mechanical module is disconnected from the primary
electronic board or there is no air supply.
Parameters
Next follows the list of 92 parameters included in the FP302 transducer block;
Idx Parameter Type
Range
Valid
Initial
Value
Unit Memory Description
1 ST_REV Unsigned16 - 0 None S
Number of changes of the static
parameters
2 TAG_DESC VisibleString - Null Na S Transducer Block Description
3 STRATEGY Unsigned16 - 0 None S
This parameter is not checked
and not processed by the
Transducer Block
4 ALERT_KEY Unsigned8 1-255 0 Na S Plant identification number
5 MODE_BLK DS-69 - O/S None S
Transducer Block operation
mode
6 BLOCK_ERR Bit String - - E D
Status associated to the