Phymetrix PLMa, Руководство пользователя

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HART Commands Implemented in the PLMa, PLMaEx and PLMa-Probe-Ex
HART Command
# Name
Description
0 Read Unique Identifier Read Device identification such as address, manufacturer, revision
level etc.
1 Read Primary Variable Read the measurement of the Primary Variable (P.V.)
2 Read Current and % of range Read the current that is produced by the Primary Variable and the
percent of range it represents. These depend on the command #51
measurement assigned to the P.V., the value of that measurement and
the assignments of command #35.
3 Read Dynamic Variables and
P.V. current Read the measurements of up to 4 measurement variables as assigned
by command # 51.
6 Write Polling Address Assign a polling address to a device. An address (1-15) puts the
device in fixed 4mA mode for multidrop connectivity. Address 0 puts
the device in 4/20mA mode.
11 Read Unique Identifier
Associated with Tag Find device that has the desired textual Tag assigned by
command # 18.
12 Read Message Read information written by command # 17.
13 Read Tag, Descriptor and Date Read information written by command # 18.
14 Read P.V. Sensor Information Information on primary sensor Serial Number, range etc.
15 Read P.V. Output Setup Analog output range, alarms etc.
16 Read Final Assembly Number Read number written by command # 19.
17 Write Message For use by owner/operator to identify the device and its use.
18 Write Tag, Descriptor and Date For use by owner/operator to identify the device and its use. Can
search for the Tag, with command # 11, on multidrop connections.
19 Write Final Assembly Number For use by owner/operator to identify the device and its use.
35 Write Primary Variable
Range Values Setup the measurement units and values that correspond to 4mA and
20mA output of the loop.
40 Analog Out Fixed Forces the Analog Output DAC to a specified value.
44 Write Primary Variable Units Select the units of measure for the Primary Variable.
45 Trim DAC Zero Trims the DAC Zero by difference of Cmnd. #40 and observed value.
46 Trim DAC Gain Trims the DAC Gain by ratio of Cmnd. #40 and observed value.
50 Read Dynamic Variable
Assignments Read the assignments of
command # 51.
51 Write Dynamic Variable
Assignments Assign Measurement
Variables to each of the four
primary variables reported by
the analyzer by command # 3.
53 Write Transmitter Variable
Units Select Units of measure for
each of the Variables.
Measurement Variables and [available units]:
00 – Moisture Measurement
°C & °F dewpoint, ppmV, mB H
2
O vapor pressure,
grams of H
2
O / m
3
and
Lbs H
2
O /10
6
standard cubic feet in Natural Gas
01 – Temperature of Gas [ °C, °F ]
02 – Temperature of Board [ °C, °F ]
03 – Pressure [ psi, bar, mbar, kg/sqcm, pascal …]
08 – Loop Voltage [ mV ]
09 – Status Bits
108 Write Burst Command Number Select command number to burst.
109 Burst Mode Control Enable/Disable burst (continuous) transmissions.
A free of charge program may be downloaded from our website www.phymetrix.com/hart.htm
that allows communicating with the PLMa or PLMaEx or PLMa-Probe-Ex HART interface.
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